subject:(Structural mechanics)

Universiteit Utrecht

1. Schoutsen, V.C.M. Worldly Structures.

Degree: 2012, Universiteit Utrecht

URL: http://dspace.library.uu.nl:8080/handle/1874/253307

► The position of structural realism is investigated and defended. A fitting metaphysics is found, notably in the work of Lyre. By using a bundle theory… (more)

Subjects/Keywords: Structural Realism; Ontology; Metaphysics; Quantum Mechanics; Bohm

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APA (6^th Edition):

Schoutsen, V. C. M. (2012). Worldly Structures. (Masters Thesis). Universiteit Utrecht. Retrieved from http://dspace.library.uu.nl:8080/handle/1874/253307

Chicago Manual of Style (16^th Edition):

Schoutsen, V C M. “Worldly Structures.” 2012. Masters Thesis, Universiteit Utrecht. Accessed April 17, 2021. http://dspace.library.uu.nl:8080/handle/1874/253307.

MLA Handbook (7^th Edition):

Schoutsen, V C M. “Worldly Structures.” 2012. Web. 17 Apr 2021.

Vancouver:

Schoutsen VCM. Worldly Structures. [Internet] [Masters thesis]. Universiteit Utrecht; 2012. [cited 2021 Apr 17]. Available from: http://dspace.library.uu.nl:8080/handle/1874/253307.

Council of Science Editors:

Schoutsen VCM. Worldly Structures. [Masters Thesis]. Universiteit Utrecht; 2012. Available from: http://dspace.library.uu.nl:8080/handle/1874/253307

University of Colorado

2. Pope, David. Implementing a Loosely Coupled Fluid Structure Interaction Finite Element Model in PHASTA.

Degree: MS, Aerospace Engineering Sciences, 2015, University of Colorado

URL: https://scholar.colorado.edu/asen_gradetds/109

► Fluid Structure Interaction problems are an important multi-physics phenomenon in the design of aerospace vehicles and other engineering applications. A variety of computational fluid… (more)

Subjects/Keywords: ALE; Structural Equations; Aerodynamics and Fluid Mechanics

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APA (6^th Edition):

Pope, D. (2015). Implementing a Loosely Coupled Fluid Structure Interaction Finite Element Model in PHASTA. (Masters Thesis). University of Colorado. Retrieved from https://scholar.colorado.edu/asen_gradetds/109

Chicago Manual of Style (16^th Edition):

Pope, David. “Implementing a Loosely Coupled Fluid Structure Interaction Finite Element Model in PHASTA.” 2015. Masters Thesis, University of Colorado. Accessed April 17, 2021. https://scholar.colorado.edu/asen_gradetds/109.

MLA Handbook (7^th Edition):

Pope, David. “Implementing a Loosely Coupled Fluid Structure Interaction Finite Element Model in PHASTA.” 2015. Web. 17 Apr 2021.

Vancouver:

Pope D. Implementing a Loosely Coupled Fluid Structure Interaction Finite Element Model in PHASTA. [Internet] [Masters thesis]. University of Colorado; 2015. [cited 2021 Apr 17]. Available from: https://scholar.colorado.edu/asen_gradetds/109.

Council of Science Editors:

Pope D. Implementing a Loosely Coupled Fluid Structure Interaction Finite Element Model in PHASTA. [Masters Thesis]. University of Colorado; 2015. Available from: https://scholar.colorado.edu/asen_gradetds/109

3. Lee, Chun Hean. Development of a cell centred upwind finite volume algorithm for a new conservation law formulation in structural dynamics.

Degree: PhD, 2012, Swansea University

URL: https://cronfa.swan.ac.uk/Record/cronfa42726 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.678409

► Over the past few decades, dynamic solid mechanics has become a major field of interest in industrial applications involving crash simulation, impact problems, forging and… (more)

▼ Over the past few decades, dynamic solid mechanics has become a major field of interest in industrial applications involving crash simulation, impact problems, forging and many others to be named. These problems are typically nonlinear due to large deformations (or geometrical nonlinearity) and nonlinear constitutive relations (or material nonlinearity). For this reason, computer simulations for such problems are of practical importance. In these simulations, the Lagrangian formulation is typically used as it automatically satisfies the mass conservation law. Explicit numerical methods are considered to be efficient in these cases. Most of the numerical methods employed for such simulations are developed from the equation of motion (or momentum balance principle). The use of low-order elements in these numerical methods often exhibits the detrimental locking phenomena in the analysis of nearly incompressible applications, which produces an undesirable effect leading to inaccurate results. Situations of this type are usual in the solid dynamics analysis for rubber materials and metal forming processes. In metal plasticity, the plastic deformation is isochoric (or volume-preserving) whereas, the compressible part is due only to elastic deformation. Recently, a new mixed formulation has been established for explicit Lagrangian transient solid dynamics. This formulation, involving linear momentum, deformation gradient and total energy, results in first order hyperbolic system of equations. Such conservation-law formulation enables stresses to converge at the same rate as velocities and displacements. In addition, it ensures that low order elements can be used without volumetric locking and/or bending difficulty for nearly incompressible applications. The new mixed formulation itself shows a clear advantage over the classical displacement-based formulation, due to its simplicity in incorporating state-of-the-art shock capturing techniques. In this research, a curl-preserving cell centred finite volume computational methodology is presented for solving the first order hyperbolic system of conservation laws on quadrilateral cartesian grids. First, by assuming that the approximation to the unknown variables is constant within each cell. This will lead to discontinuities at cell edges which will motivate the use of a Riemann solver by introducing an upwind bias into the evaluation of the numerical flux function. Unfortunately, the accuracy is severely undermined by an excess of numerical dissipation. In order to alleviate this, it is vital to introduce a linear reconstruction procedure for enhancing the accuracy of the scheme. However the second-order spatial method does not prohibit spurious oscillation in the vicinity of sharp gradients. To circumvent this, a nonlinear slope limiter will then be introduced. It is now possible to evolve the semi-discrete evolutionary system of ordinary equations in time with the aid of the family of explicit Total Variation Diminishing Runge Kutta (TVD-RK) time marching schemes. Moreover, a…

Subjects/Keywords: 624.1; Structural dynamics; Lagrangian functions; Mechanics

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APA (6^th Edition):

Lee, C. H. (2012). Development of a cell centred upwind finite volume algorithm for a new conservation law formulation in structural dynamics. (Doctoral Dissertation). Swansea University. Retrieved from https://cronfa.swan.ac.uk/Record/cronfa42726 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.678409

Chicago Manual of Style (16^th Edition):

Lee, Chun Hean. “Development of a cell centred upwind finite volume algorithm for a new conservation law formulation in structural dynamics.” 2012. Doctoral Dissertation, Swansea University. Accessed April 17, 2021. https://cronfa.swan.ac.uk/Record/cronfa42726 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.678409.

MLA Handbook (7^th Edition):

Lee, Chun Hean. “Development of a cell centred upwind finite volume algorithm for a new conservation law formulation in structural dynamics.” 2012. Web. 17 Apr 2021.

Vancouver:

Lee CH. Development of a cell centred upwind finite volume algorithm for a new conservation law formulation in structural dynamics. [Internet] [Doctoral dissertation]. Swansea University; 2012. [cited 2021 Apr 17]. Available from: https://cronfa.swan.ac.uk/Record/cronfa42726 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.678409.

Council of Science Editors:

Lee CH. Development of a cell centred upwind finite volume algorithm for a new conservation law formulation in structural dynamics. [Doctoral Dissertation]. Swansea University; 2012. Available from: https://cronfa.swan.ac.uk/Record/cronfa42726 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.678409

University of Cape Town

4. De Kock, Warrick. Finite element modelling of voided slab bridge decks using orthotropic plate theory.

Degree: Image, Civil Engineering, 2015, University of Cape Town

URL: http://hdl.handle.net/11427/24304

► Circular voids are often incorporated into concrete bridge decks to reduce their self-weight without greatly reducing the flexural stiffness. Incorporating voids within a slab offers… (more)

▼ Circular voids are often incorporated into concrete bridge decks to reduce their self-weight without greatly reducing the flexural stiffness. Incorporating voids within a slab offers many advantages over a conventional solid concrete slab, for example a lower total cost of construction, reduced material use, and enhanced structural efficiency. The advantages of this topology are obvious, however the voids within the slab complicate the analysis of the structure. The incorporation of the voids within the slab results in different flexural stiffness in the longitudinal and transverse directions, resulting in an orthotropic slab. Another feature which distinguishes voided slabs from other common bridge types is the deformable nature of their cross-sections, which influences the load distribution of the structure. The need for a method of analysis which accounts for the orthotropic behaviour and deformable nature of the cross-section has been suggested by many in the past. The idealisation of voided slabs as an orthotropic plate has been the subject of extensive research. When modelling a voided slab as an orthotropic plate, it is necessary to calculate the reduction in the longitudinal and transverse stiffness due to the presence of the voids. Several equivalent plate parameters, which take on numerous forms, have been suggested by various authors to account for the effect of the voids. No research has been reported in technical literature to compare these different methods employing orthotropic plate parameters. Key shortcomings to these methods include the lack of definition of the suggested equivalent plate parameters, and the geometrical parameters of voided slabs which influence their behaviour. In an attempt to address these limitations, the aim of this study is to verify and validate the effect of the void diameter ratio and void spacing on the structural behaviour of voided slabs, which are the main influences on the orthotropic behaviour and cross-section deformation. The different methods of analysis using orthotropic plate theory suggested by various authors employing equivalent plate parameters are compared and discussed. The objectives of the study were achieved based on the finite element approach using ABAQUS. Finite element models with a void diameter to slab depth ratio range of 0.5 to 0.9, and a void spacing range of 0.9m to 2.7m were considered and analysed. Comparisons were made of the longitudinal and transverse stress distribution results from these models in order to draw conclusions. Results from solid models using both isotropic and orthotropic materials based on the equivalent plate parameters suggested from literature are also presented for comparison in order to verify the methods suggested by the technical literature for the analysis of voided slab bridge decks. Results of the finite element modelling show that the addition of voids causes large variations to the transverse stress distribution from the typical parabolic transverse stress distribution shape, leading to large peak transverse… Advisors/Committee Members: Moyo, Pilate (advisor).

Subjects/Keywords: Civil Engineering; Structural Engineering and Mechanics

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APA (6^th Edition):

De Kock, W. (2015). Finite element modelling of voided slab bridge decks using orthotropic plate theory. (Thesis). University of Cape Town. Retrieved from http://hdl.handle.net/11427/24304

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

De Kock, Warrick. “Finite element modelling of voided slab bridge decks using orthotropic plate theory.” 2015. Thesis, University of Cape Town. Accessed April 17, 2021. http://hdl.handle.net/11427/24304.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

De Kock, Warrick. “Finite element modelling of voided slab bridge decks using orthotropic plate theory.” 2015. Web. 17 Apr 2021.

Vancouver:

De Kock W. Finite element modelling of voided slab bridge decks using orthotropic plate theory. [Internet] [Thesis]. University of Cape Town; 2015. [cited 2021 Apr 17]. Available from: http://hdl.handle.net/11427/24304.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

De Kock W. Finite element modelling of voided slab bridge decks using orthotropic plate theory. [Thesis]. University of Cape Town; 2015. Available from: http://hdl.handle.net/11427/24304

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Montana State University

5. Seifert, Neil Jordan. Structural analysis of the Benkar Fault Zone, a cross structure in the higher Himalaya of the Khumbu Region, eastern Nepal.

Degree: MS, College of Letters & Science, 2019, Montana State University

URL: https://scholarworks.montana.edu/xmlui/handle/1/15597

► The Himalaya are dominated by laterally continuous, range-parallel thrust faults and less frequent extensional structures such as the South Tibetan Detachment system. Recent discovery of… (more)

▼ The Himalaya are dominated by laterally continuous, range-parallel thrust faults and less frequent extensional structures such as the South Tibetan Detachment system. Recent discovery of range-perpendicular strike-slip and extensional fault zones (cross structures) in the Himalaya has raised questions regarding the significance of these structures in the collisional process. I have analyzed a newly-recognized cross structure in the Khumbu region of eastern Nepal, the Benkar Fault Zone. Structural mapping, petrographic observation, and analytical evidence reveals a zone of consistently NE-striking, SE-dipping metamorphic foliation from the villages of Phakding to Gorak Shep along the Dudh Kosi valley. Deformation within this zone is restricted to foliation-parallel, nonpenetrative, anastomosing sillimanite- and mica-bearing shear zones that wrap around poorly deformed quartz and feldspar enclaves. Kinematics of these shear zones from thin sections and outcrop observations are consistent with normal, right-lateral oblique slip and some local zones of purely extensional displacement. Quartz crystallographic fabric orientation suggests crystal plastic deformation under upper greenschist to lower amphibolite facies conditions. Outcrop observations show evidence for isolated brittle-ductile deformation, suggesting short-lived brittle events that punctuated a history of predominantly plastic deformation. Benkar Fault Zone fabric crosscuts older, thrust-related foliation and suggests that deformation within the zone postdates peak metamorphism and occurred while rocks were on the retrograde path. Crosscutting relationships between Benkar Fault Zone fabric and leucogranites constraints the timing of deformation to be younger than 20.5-21.3 Ma. The Benkar Fault Zone is interpreted to represent a tear fault within the Greater Himalayan sequence associated with differential displacement along a structurally deeper thrust. Advisors/Committee Members: Chairperson, Graduate Committee: Mary S. Hubbard (advisor).

Subjects/Keywords: Faults (Geology); Geology, Structural; Deformations (Mechanics)

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APA (6^th Edition):

Seifert, N. J. (2019). Structural analysis of the Benkar Fault Zone, a cross structure in the higher Himalaya of the Khumbu Region, eastern Nepal. (Masters Thesis). Montana State University. Retrieved from https://scholarworks.montana.edu/xmlui/handle/1/15597

Chicago Manual of Style (16^th Edition):

Seifert, Neil Jordan. “Structural analysis of the Benkar Fault Zone, a cross structure in the higher Himalaya of the Khumbu Region, eastern Nepal.” 2019. Masters Thesis, Montana State University. Accessed April 17, 2021. https://scholarworks.montana.edu/xmlui/handle/1/15597.

MLA Handbook (7^th Edition):

Seifert, Neil Jordan. “Structural analysis of the Benkar Fault Zone, a cross structure in the higher Himalaya of the Khumbu Region, eastern Nepal.” 2019. Web. 17 Apr 2021.

Vancouver:

Seifert NJ. Structural analysis of the Benkar Fault Zone, a cross structure in the higher Himalaya of the Khumbu Region, eastern Nepal. [Internet] [Masters thesis]. Montana State University; 2019. [cited 2021 Apr 17]. Available from: https://scholarworks.montana.edu/xmlui/handle/1/15597.

Council of Science Editors:

Seifert NJ. Structural analysis of the Benkar Fault Zone, a cross structure in the higher Himalaya of the Khumbu Region, eastern Nepal. [Masters Thesis]. Montana State University; 2019. Available from: https://scholarworks.montana.edu/xmlui/handle/1/15597

University of Maine

6. Alabbad, Maitham. Impact Resistance of Fiber-Reinforced Composites Using Computational Simulations.

Degree: MS, Mechanical Engineering, 2020, University of Maine

URL: https://digitalcommons.library.umaine.edu/etd/3174

► Composite materials are widely used in aerospace, automotive and wind power industries due to their high strength-to-weight and stiffness-to-weight ratios and their improved mechanical… (more)

Subjects/Keywords: Engineering Mechanics; Mechanical Engineering; Mechanics of Materials; Structural Materials

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APA (6^th Edition):

Alabbad, M. (2020). Impact Resistance of Fiber-Reinforced Composites Using Computational Simulations. (Masters Thesis). University of Maine. Retrieved from https://digitalcommons.library.umaine.edu/etd/3174

Chicago Manual of Style (16^th Edition):

Alabbad, Maitham. “Impact Resistance of Fiber-Reinforced Composites Using Computational Simulations.” 2020. Masters Thesis, University of Maine. Accessed April 17, 2021. https://digitalcommons.library.umaine.edu/etd/3174.

MLA Handbook (7^th Edition):

Alabbad, Maitham. “Impact Resistance of Fiber-Reinforced Composites Using Computational Simulations.” 2020. Web. 17 Apr 2021.

Vancouver:

Alabbad M. Impact Resistance of Fiber-Reinforced Composites Using Computational Simulations. [Internet] [Masters thesis]. University of Maine; 2020. [cited 2021 Apr 17]. Available from: https://digitalcommons.library.umaine.edu/etd/3174.

Council of Science Editors:

Alabbad M. Impact Resistance of Fiber-Reinforced Composites Using Computational Simulations. [Masters Thesis]. University of Maine; 2020. Available from: https://digitalcommons.library.umaine.edu/etd/3174

Delft University of Technology

7. De Lazzari, Elena (author). A NURBS-enhanced Discontinuity-Enriched Finite Element Method.

Degree: 2017, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:2a4f3015-0fb5-4342-96c8-eb6fd1d92646

► Generalized finite element methods have proved a great potential in the mesh-independent modeling of both weak and strong discontinuities, such as the ones encountered when… (more)

▼ Generalized finite element methods have proved a great potential in the mesh-independent modeling of both weak and strong discontinuities, such as the ones encountered when treating materials with inclusions or cracks. By removing the constraint of a conforming mesh, more freedom is offered to modeling exact geometries by means of splines. However, very few studies have been published which combine Non-Uniform Rational B-Splines (NURBS) to interface-enriched methods, addressing uniquely weak discontinuities. Therefore, the aim of this thesis is to propose a NURBS-based enhancement to the Discontinuity-Enriched Finite Element Method (DE-FEM) in two dimensions and to discuss the potential of its application. The main advantage of this method is the possibility to study problems that present discontinuities with arbitrary smooth shapes, while maintaining exact geometries throughout the analysis: in this way, the equivalence between design and computational geometry is preserved. To this purpose, a suitable NURBS-based analysis technique is selected and implemented within the framework offered by the group's finite element library, Hybrida. The capabilities of the NURBS-enhanced DE-FEM to solve several weakly discontinuous problems are assessed for composites of different complexities. Furthermore, a novel study is presented which extends this technique to the treatment of strong discontinuities, in the context of fracture mechanics. The accuracy, convergence properties and numerical efficiency of the proposed method are investigated, in particular in comparison with the standard DE-FEM. Based on these observations, further insights are provided into the convenience and the limitations of adopting NURBS enhancements within the DE-FEM formulation. Lastly, some recommendations about possible directions of improvement are provided. Advisors/Committee Members: Aragon, Alejandro (mentor), van Keulen, Fred (graduation committee), van der Meer, Frans (graduation committee), Turteltaub, Sergio (graduation committee), Delft University of Technology (degree granting institution).

Subjects/Keywords: FEM; NURBS; structural mechanics; discontinuities; composites; fracture mechanics

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APA (6^th Edition):

De Lazzari, E. (. (2017). A NURBS-enhanced Discontinuity-Enriched Finite Element Method. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:2a4f3015-0fb5-4342-96c8-eb6fd1d92646

Chicago Manual of Style (16^th Edition):

De Lazzari, Elena (author). “A NURBS-enhanced Discontinuity-Enriched Finite Element Method.” 2017. Masters Thesis, Delft University of Technology. Accessed April 17, 2021. http://resolver.tudelft.nl/uuid:2a4f3015-0fb5-4342-96c8-eb6fd1d92646.

MLA Handbook (7^th Edition):

De Lazzari, Elena (author). “A NURBS-enhanced Discontinuity-Enriched Finite Element Method.” 2017. Web. 17 Apr 2021.

Vancouver:

De Lazzari E(. A NURBS-enhanced Discontinuity-Enriched Finite Element Method. [Internet] [Masters thesis]. Delft University of Technology; 2017. [cited 2021 Apr 17]. Available from: http://resolver.tudelft.nl/uuid:2a4f3015-0fb5-4342-96c8-eb6fd1d92646.

Council of Science Editors:

De Lazzari E(. A NURBS-enhanced Discontinuity-Enriched Finite Element Method. [Masters Thesis]. Delft University of Technology; 2017. Available from: http://resolver.tudelft.nl/uuid:2a4f3015-0fb5-4342-96c8-eb6fd1d92646

University of Johannesburg

8. Human, Etienne. The feasibility of vibration analysis as a mechanism of failure analysis in failure investigations and root cause analysis.

Degree: 2012, University of Johannesburg

URL: http://hdl.handle.net/10210/5339

►

M.Phil.

“Failure is one of the unfortunate facts of life”. This is the very first statement in the book by Coetzee (1998). This statement is… (more)

Subjects/Keywords: Vibration; Structural dynamics; Structural analysis (Engineering); Mechanics, Applied; System failures (Engineering)

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APA (6^th Edition):

Human, E. (2012). The feasibility of vibration analysis as a mechanism of failure analysis in failure investigations and root cause analysis. (Thesis). University of Johannesburg. Retrieved from http://hdl.handle.net/10210/5339

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Human, Etienne. “The feasibility of vibration analysis as a mechanism of failure analysis in failure investigations and root cause analysis.” 2012. Thesis, University of Johannesburg. Accessed April 17, 2021. http://hdl.handle.net/10210/5339.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Human, Etienne. “The feasibility of vibration analysis as a mechanism of failure analysis in failure investigations and root cause analysis.” 2012. Web. 17 Apr 2021.

Vancouver:

Human E. The feasibility of vibration analysis as a mechanism of failure analysis in failure investigations and root cause analysis. [Internet] [Thesis]. University of Johannesburg; 2012. [cited 2021 Apr 17]. Available from: http://hdl.handle.net/10210/5339.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Human E. The feasibility of vibration analysis as a mechanism of failure analysis in failure investigations and root cause analysis. [Thesis]. University of Johannesburg; 2012. Available from: http://hdl.handle.net/10210/5339

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Duke University

9. Sanders, Clay Michael. Inverse-Problem Inspired Approaches in the Design of Solids for Frequency-Domain Dynamics .

Degree: 2020, Duke University

URL: http://hdl.handle.net/10161/21500

► Dynamic conditions and harmful vibration are prevalent in many engineered systems. Computational optimization methods can usefully guide the design of structures and solid systems… (more)

▼ Dynamic conditions and harmful vibration are prevalent in many engineered systems. Computational optimization methods can usefully guide the design of structures and solid systems to obtain layouts with desired dynamic behaviors, such as minimized or tailored vibration response, while accounting for additional constraints. Due to resonance phenomena in steady-state dynamics, however, objectives used to control dynamic response possess many local minima that may represent poor solutions to a design problem, causing challenges for gradient-based optimization methods. Additionally, designs are typically characterized by high-dimensional parameter spaces, which require costly regularization operations and can lead to slow convergence. This dissertation presents strategies to address these obstacles in dynamic response design problems, seeking inspiration from solution strategies for the related class of medium inversion problems. We propose an extension of the modified error in constitutive equations (MECE) method, used previously in material identification problems, as a new approach for frequency-domain dynamics topology optimization to mitigate solution dependence upon initial guess and considered loading conditions. The main idea of the MECE strategy is to relax the constitutive relations between stresses and strains and between inertial forces and displacements in the elastodynamic PDE-constraint. An additional penalty-like term measuring the discrepancy in these relations is added to the objective, so that both model error and the original response objective are minimized. The resulting optimization problem features an objective more amenable to minimization, as resonant responses are suppressed in the relaxed elastodynamic model. We show that this approach yields superior designs to conventional gradient-based optimization approaches that solely use a functional of displacements as the objective, while strictly enforcing the constitutive equations. We highlight the merits of our approach in a variety of scenarios for direct frequency response design, considering multiple frequency load cases and different frequency-response control objectives. We next present an adaptive eigenspace basis (AEB) strategy for effective design dimensionality reduction in topology optimization problems. We construct the density field as a linear combination of eigenfunctions, computed for an elliptic operator defined over the design domain, and solve for the associated eigenfunction coefficients. Restriction to this finite-dimensional eigenspace drastically reduces the design dimension and imposes implicit regularization upon the solution. We furthermore develop a basis adaptation scheme, in which we iteratively recompute the eigenfunction basis to conform to the evolving solution field, enabling further dimension reduction and acceleration of the optimization process. We demonstrate the AEB method on topology optimization problems for static linear elasticity, benchmarking its performance against conventional TO… Advisors/Committee Members: Aquino, Wilkins (advisor).

Subjects/Keywords: Engineering; Computational Mechanics; Structural Design; Structural Dynamics; Topology Optimization

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APA (6^th Edition):

Sanders, C. M. (2020). Inverse-Problem Inspired Approaches in the Design of Solids for Frequency-Domain Dynamics . (Thesis). Duke University. Retrieved from http://hdl.handle.net/10161/21500

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Sanders, Clay Michael. “Inverse-Problem Inspired Approaches in the Design of Solids for Frequency-Domain Dynamics .” 2020. Thesis, Duke University. Accessed April 17, 2021. http://hdl.handle.net/10161/21500.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Sanders, Clay Michael. “Inverse-Problem Inspired Approaches in the Design of Solids for Frequency-Domain Dynamics .” 2020. Web. 17 Apr 2021.

Vancouver:

Sanders CM. Inverse-Problem Inspired Approaches in the Design of Solids for Frequency-Domain Dynamics . [Internet] [Thesis]. Duke University; 2020. [cited 2021 Apr 17]. Available from: http://hdl.handle.net/10161/21500.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Sanders CM. Inverse-Problem Inspired Approaches in the Design of Solids for Frequency-Domain Dynamics . [Thesis]. Duke University; 2020. Available from: http://hdl.handle.net/10161/21500

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Michigan Technological University

10. Prabhakara, Parijata. INCREASING ACCESS TO PV TECHNOLOGY THROUGH SUSTAINABLE RACKING: A REVIEW OF EXISTING LITERATURE AND GROUND MOUNTED FIXED TILT DESIGNS, AND WHAT CAN BE DONE NEXT.

Degree: MS, Department of Mechanical Engineering-Engineering Mechanics, 2020, Michigan Technological University

URL: https://digitalcommons.mtu.edu/etdr/1017

► There is a lack of literature on the structural balance of systems (BOS), also called racking, for ground mount, fixed-tilt solar PV systems. Literature… (more)

Subjects/Keywords: solar; pv; sustainable; racking; community development; structural analysis; Applied Mechanics; Engineering Mechanics; Mechanics of Materials; Structural Materials

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APA (6^th Edition):

Prabhakara, P. (2020). INCREASING ACCESS TO PV TECHNOLOGY THROUGH SUSTAINABLE RACKING: A REVIEW OF EXISTING LITERATURE AND GROUND MOUNTED FIXED TILT DESIGNS, AND WHAT CAN BE DONE NEXT. (Masters Thesis). Michigan Technological University. Retrieved from https://digitalcommons.mtu.edu/etdr/1017

Chicago Manual of Style (16^th Edition):

Prabhakara, Parijata. “INCREASING ACCESS TO PV TECHNOLOGY THROUGH SUSTAINABLE RACKING: A REVIEW OF EXISTING LITERATURE AND GROUND MOUNTED FIXED TILT DESIGNS, AND WHAT CAN BE DONE NEXT.” 2020. Masters Thesis, Michigan Technological University. Accessed April 17, 2021. https://digitalcommons.mtu.edu/etdr/1017.

MLA Handbook (7^th Edition):

Prabhakara, Parijata. “INCREASING ACCESS TO PV TECHNOLOGY THROUGH SUSTAINABLE RACKING: A REVIEW OF EXISTING LITERATURE AND GROUND MOUNTED FIXED TILT DESIGNS, AND WHAT CAN BE DONE NEXT.” 2020. Web. 17 Apr 2021.

Vancouver:

Prabhakara P. INCREASING ACCESS TO PV TECHNOLOGY THROUGH SUSTAINABLE RACKING: A REVIEW OF EXISTING LITERATURE AND GROUND MOUNTED FIXED TILT DESIGNS, AND WHAT CAN BE DONE NEXT. [Internet] [Masters thesis]. Michigan Technological University; 2020. [cited 2021 Apr 17]. Available from: https://digitalcommons.mtu.edu/etdr/1017.

Council of Science Editors:

Prabhakara P. INCREASING ACCESS TO PV TECHNOLOGY THROUGH SUSTAINABLE RACKING: A REVIEW OF EXISTING LITERATURE AND GROUND MOUNTED FIXED TILT DESIGNS, AND WHAT CAN BE DONE NEXT. [Masters Thesis]. Michigan Technological University; 2020. Available from: https://digitalcommons.mtu.edu/etdr/1017

Ryerson University

11. Waseem, Muhammad. Design and analysis of plate anchors in sand.

Degree: 2011, Ryerson University

URL: https://digital.library.ryerson.ca/islandora/object/RULA%3A6366

► Plate anchors, as an efficient and reliable anchorage system, have been widely used to resist uplift forces produced by structures, such as transmission towers, offshore… (more)

Subjects/Keywords: Anchorage (Structural engineering) – Testing; Materials – Dynamic testing; Soil mechanics – Testing; Loads (Mechanics)

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Waseem, M. (2011). Design and analysis of plate anchors in sand. (Thesis). Ryerson University. Retrieved from https://digital.library.ryerson.ca/islandora/object/RULA%3A6366

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Waseem, Muhammad. “Design and analysis of plate anchors in sand.” 2011. Thesis, Ryerson University. Accessed April 17, 2021. https://digital.library.ryerson.ca/islandora/object/RULA%3A6366.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Waseem, Muhammad. “Design and analysis of plate anchors in sand.” 2011. Web. 17 Apr 2021.

Vancouver:

Waseem M. Design and analysis of plate anchors in sand. [Internet] [Thesis]. Ryerson University; 2011. [cited 2021 Apr 17]. Available from: https://digital.library.ryerson.ca/islandora/object/RULA%3A6366.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Waseem M. Design and analysis of plate anchors in sand. [Thesis]. Ryerson University; 2011. Available from: https://digital.library.ryerson.ca/islandora/object/RULA%3A6366

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Arizona

12. Qashu, Riyad K. FINITE DEFORMATION AND STABILITY OF NONRECTANGULAR ELASTIC RIGID FRAME STRUCTURES .

Degree: 1980, University of Arizona

URL: http://hdl.handle.net/10150/298672

Subjects/Keywords: Structural frames.; Deformations (Mechanics); Buckling (Mechanics)

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Qashu, R. K. (1980). FINITE DEFORMATION AND STABILITY OF NONRECTANGULAR ELASTIC RIGID FRAME STRUCTURES . (Doctoral Dissertation). University of Arizona. Retrieved from http://hdl.handle.net/10150/298672

Chicago Manual of Style (16^th Edition):

Qashu, Riyad K. “FINITE DEFORMATION AND STABILITY OF NONRECTANGULAR ELASTIC RIGID FRAME STRUCTURES .” 1980. Doctoral Dissertation, University of Arizona. Accessed April 17, 2021. http://hdl.handle.net/10150/298672.

MLA Handbook (7^th Edition):

Qashu, Riyad K. “FINITE DEFORMATION AND STABILITY OF NONRECTANGULAR ELASTIC RIGID FRAME STRUCTURES .” 1980. Web. 17 Apr 2021.

Vancouver:

Qashu RK. FINITE DEFORMATION AND STABILITY OF NONRECTANGULAR ELASTIC RIGID FRAME STRUCTURES . [Internet] [Doctoral dissertation]. University of Arizona; 1980. [cited 2021 Apr 17]. Available from: http://hdl.handle.net/10150/298672.

Council of Science Editors:

Qashu RK. FINITE DEFORMATION AND STABILITY OF NONRECTANGULAR ELASTIC RIGID FRAME STRUCTURES . [Doctoral Dissertation]. University of Arizona; 1980. Available from: http://hdl.handle.net/10150/298672

Stellenbosch University

13. van Zijl, Gideon Pieter Adriaan Greeff. Contributions to structural mechanics and durability in structural engineering.

Degree: DEng, Civil Engineering, 2016, Stellenbosch University

URL: http://hdl.handle.net/10019.1/100182

► ENGLISH ABSTRACT: Contributions to structural engineering have been made since 2001 from the basis of the Department of Civil Engineering of Stellenbosch University (SU). The… (more)

▼ ENGLISH ABSTRACT: Contributions to structural engineering have been made since 2001 from the basis of the Department of Civil Engineering of Stellenbosch University (SU). The inauguration of the Centre for Development of Sustained Infrastructure (CDSI) in 2002 has been instrumental in defining, directing and scoping the research and development in the categories Advanced cement-based construction materials, Crack formation and durability towards durability design, Renovation and retrofitting towards extended life span and Sustainable energy harvesting structures. The contributions are structured along these categories as chapters of this dissertation. Early career background in structural Engineering at the Institute for Structural Engineering (1987-1989) and Bureau for Mechanical Engineering (1989-1992) and higher education in computational and structural mechanics (PhD 1995-1999, Research Fellow 1999-2001, TU Delft), shaped the research interests in these fields. Continued affiliation with TU Delft (30%) and SU (70%) in the years 2001-2009 provided access to collegial expertise in related fields of experimental research, materials engineering, risk and reliability, and structural design at these institutions and beyond. In this way, national and international collaboration complemented structural and computational mechanics in well-rounded research programs in the mentioned categories. Clearly, the contributions are the result of collaboration in which the author to various degrees led, participated in and supervised research and development. Highlights of the contributions in the four categories are described at a relatively high level towards conveying the contributions in the national and international context. To a degree selective reporting is done, and the reader directed to detailed elaborations in roughly 200 dissertations, theses and technical papers supervised or co-supervised, authored and co-authored. Approach by the infrastructure pre-fabrication industry in South Africa towards development of accelerated and new product lines led to the development of advanced cement-based construction materials (ACM) with local ingredients, and appropriate adaption of the materials to industrial fabrication process of high-pressure extrusion. What started as fibre inclusion towards reduced traditional steel reinforcement in concrete pipes, led to development, characterisation, manufacturing and constitutive modelling of steel fibre concrete and strainhardening cement-based composites (SHCC). Roles of international leadership in co-chairing and chairing RILEM technical committees followed, as well as co-editing of books on the state-of-the-art of Durability of SHCC and a Framework of durability design with SHCC respectively. Particular contributions of significant potential towards the ability to design for durable, sustainable infrastructure, were made in chloride-induced corrosion and alkali silica reaction. In both cases crack formation and durability, i.e. structural durability in … Advisors/Committee Members: Boshoff, William Peter, Stellenbosch University. Faculty of Engineering. Dept. of Civil Engineering..

Subjects/Keywords: Structural mechanics; Durability of building materials; Structural analysis (Engineering); Buildings – Retrofitting; UCTD

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

van Zijl, G. P. A. G. (2016). Contributions to structural mechanics and durability in structural engineering. (Thesis). Stellenbosch University. Retrieved from http://hdl.handle.net/10019.1/100182

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

van Zijl, Gideon Pieter Adriaan Greeff. “Contributions to structural mechanics and durability in structural engineering.” 2016. Thesis, Stellenbosch University. Accessed April 17, 2021. http://hdl.handle.net/10019.1/100182.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

van Zijl, Gideon Pieter Adriaan Greeff. “Contributions to structural mechanics and durability in structural engineering.” 2016. Web. 17 Apr 2021.

Vancouver:

van Zijl GPAG. Contributions to structural mechanics and durability in structural engineering. [Internet] [Thesis]. Stellenbosch University; 2016. [cited 2021 Apr 17]. Available from: http://hdl.handle.net/10019.1/100182.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

van Zijl GPAG. Contributions to structural mechanics and durability in structural engineering. [Thesis]. Stellenbosch University; 2016. Available from: http://hdl.handle.net/10019.1/100182

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Johannesburg

14. Bukusa, Gregoire Mulumba. Lateral torsional instability of single channels restrained by angle cleats.

Degree: 2014, University of Johannesburg

URL: http://hdl.handle.net/10210/10811

►

M.Ing. (Civil Engineering)

Cold-formed steel lipped channels are among the most used sections, as framing members in the building construction industry, especially in residential, commercial… (more)

▼

M.Ing. (Civil Engineering)

Cold-formed steel lipped channels are among the most used sections, as framing members in the building construction industry, especially in residential, commercial and industrial buildings. In portal frame, when lipped channels are used as main frame members, they are usually restrained from the top flange through angle-cleat to prevent lateral-torsional buckling. This restraining system works together with an additional restrain system called fly-bracing. Drilling a bolt-hole or welding the angle cleat onto the flange of the main frame weakens its bearing length. Additional disadvantage of this restraining system is the fabrication costs of providing fly bracing. However, past research into lateral-torsional buckling of cold-formed steel lipped channel sections are limited. Therefore this study investigates a restrain that avoids bolt holes and welding in the top flange of the rafter, and the use of fly bracing. In the first phase of this research, tensile coupon tests of the three cross-sections are conducted to obtain the material properties. The elastic modulus and yield strength of the cold-formed steel used are determined from stress-strain relationship. These properties are used to calculate the code-predicted lateral-torsional buckling moment resistance. The second phase of this study involves a series of experiments on the lateral torsional instability of single cold-formed channels. The channels are restrained by a purlin – angle cleat connection and are subjected to a two point loading system in order to simulate a distributed load. Failure of the channels occurred by local buckling of the compression zone of the flange and web and lateral torsional buckling of the channels between points of lateral support. Tests have shown the purlin – angle cleat connection to be capable of restraining the frames from failing due to lateral-torsional buckling. This eliminates the idea of using fly-bracings, as is normally done in practice to restrain torsional instability. The results from the experimental study do agree well with those predict by the South- African code, SANS 10162-2: 2005. This research presents the details and results of the experimental study including a comparison of results with the South-African code SANS 10162-2: 2005 predictions. It also presents the recommendations made regarding the use of a numerical model study in order to compare the results with those from the experiments.

Subjects/Keywords: Channels (Structural members) - Testing; Angles (Structural members) - Testing; Strains and stresses; Buckling (Mechanics)

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Bukusa, G. M. (2014). Lateral torsional instability of single channels restrained by angle cleats. (Thesis). University of Johannesburg. Retrieved from http://hdl.handle.net/10210/10811

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Bukusa, Gregoire Mulumba. “Lateral torsional instability of single channels restrained by angle cleats.” 2014. Thesis, University of Johannesburg. Accessed April 17, 2021. http://hdl.handle.net/10210/10811.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Bukusa, Gregoire Mulumba. “Lateral torsional instability of single channels restrained by angle cleats.” 2014. Web. 17 Apr 2021.

Vancouver:

Bukusa GM. Lateral torsional instability of single channels restrained by angle cleats. [Internet] [Thesis]. University of Johannesburg; 2014. [cited 2021 Apr 17]. Available from: http://hdl.handle.net/10210/10811.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Bukusa GM. Lateral torsional instability of single channels restrained by angle cleats. [Thesis]. University of Johannesburg; 2014. Available from: http://hdl.handle.net/10210/10811

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Columbia University

15. Arriaga e Cunha, Miguel Torre do Vale. Stability Analysis of Metals Capturing Brittle and Ductile Fracture through a Phase Field Method and Shear Band Localization.

Degree: 2016, Columbia University

URL: https://doi.org/10.7916/D8RX9HPR

► Dynamic fracture of metals is a fascinating multiphysics-multiscale problem that often results in brittle and/or ductile fracture of structural components. Additionally, under high strain rates… (more)

▼ Dynamic fracture of metals is a fascinating multiphysics-multiscale problem that often results in brittle and/or ductile fracture of structural components. Additionally, under high strain rates such as impact or blast loads, a failure phenomena known as shear banding may also occur, which is a common precursor to fracture. Both fracture and shear banding are instability processes leading to strong discontinuities and strain localization, respectively. Namely, shear bands are zones of highly localized plastic deformation, while brittle/ductile cracks are material discontinuities due to cleavage and/or void coalescence. Furthermore, while fracture events are mostly driven by triaxial tensile loading, shear bands are driven by shear heating caused by inelastic deformations and high temperature rise. In this work, fracture is modeled through a phase field formulation coupled to a set of equations that describe shear bands. While fracture is governed by a strong length scale that propagates at a fast time scale, shear bands are dominated by a weak length scale and propagate slower. These are two different failure modes with distinct spatial and temporal scales. This thesis is aimed at the development of analytical and numerical methods to determine the onset of both shear band localization and fracture. The main contribution of this thesis is the formulation of analytical criteria, based on the linear perturbation method, for the onset of fracture and shear band instabilities. We first propose a stability framework for shear bands that account for a non-constant Taylor Quinney coefficient. In addition, we apply the linear perturbation method to the phase field formulation of fracture to study the onset of unstable crack growth. The derivations lead to an analytical, energy based criterion for the phase field method in linear elastic and visco-plastic materials. The stability criterion not only recovers the critical stress value reported in the literature for simple elastic cases but also provides a criterion for visco-plastic materials with a general degradation function and fracture induced by cold-work. Finally, we analyze the physical stability of both failure modes and their interaction. The analysis provides insight into the dominant failure mode and can be used as a criterion for mesh refinement. Several numerical results with different geometries and a range of strain rate loadings demonstrate that the stability criterion predicts well the onset of failure instability in dynamic fracture applications. For the example problems considered, if a fracture instability precedes shear banding, a brittle-like failure mode is observed, while if a shear band instability is initiated significantly before fracture, a ductile-like failure mode is expected. In any case, fracture instability is stronger than a shear band instability and if initiated will dominate the response. Another contribution of this thesis is the development of numerical type…

Subjects/Keywords: Metals – Brittleness; Metals – Ductility; Viscoplasticity; Structural failures; Structural stability; Fracture mechanics; Civil engineering

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Arriaga e Cunha, M. T. d. V. (2016). Stability Analysis of Metals Capturing Brittle and Ductile Fracture through a Phase Field Method and Shear Band Localization. (Doctoral Dissertation). Columbia University. Retrieved from https://doi.org/10.7916/D8RX9HPR

Chicago Manual of Style (16^th Edition):

Arriaga e Cunha, Miguel Torre do Vale. “Stability Analysis of Metals Capturing Brittle and Ductile Fracture through a Phase Field Method and Shear Band Localization.” 2016. Doctoral Dissertation, Columbia University. Accessed April 17, 2021. https://doi.org/10.7916/D8RX9HPR.

MLA Handbook (7^th Edition):

Arriaga e Cunha, Miguel Torre do Vale. “Stability Analysis of Metals Capturing Brittle and Ductile Fracture through a Phase Field Method and Shear Band Localization.” 2016. Web. 17 Apr 2021.

Vancouver:

Arriaga e Cunha MTdV. Stability Analysis of Metals Capturing Brittle and Ductile Fracture through a Phase Field Method and Shear Band Localization. [Internet] [Doctoral dissertation]. Columbia University; 2016. [cited 2021 Apr 17]. Available from: https://doi.org/10.7916/D8RX9HPR.

Council of Science Editors:

Arriaga e Cunha MTdV. Stability Analysis of Metals Capturing Brittle and Ductile Fracture through a Phase Field Method and Shear Band Localization. [Doctoral Dissertation]. Columbia University; 2016. Available from: https://doi.org/10.7916/D8RX9HPR

Hong Kong University of Science and Technology

16. Jamshidi, Maziar CIVL. Development of a new regenerative electromagnetic damper for vibration control of civil engineering structures.

Degree: 2018, Hong Kong University of Science and Technology

URL: http://repository.ust.hk/ir/Record/1783.1-92264 ; https://doi.org/10.14711/thesis-991012588466403412 ; http://repository.ust.hk/ir/bitstream/1783.1-92264/1/th_redirect.html

► In recent years, there has been a surge of interest in scavenging the mechanical energy from the ambient vibration induced by environmental disturbance. In the… (more)

▼ In recent years, there has been a surge of interest in scavenging the mechanical energy from the ambient vibration induced by environmental disturbance. In the field of civil engineering, the potential of using this harvested power to supply the power demand of small consuming devices, like sensors, gave researchers the motivation to explore this area. Among all harvesting techniques Piezoelectric and Electromagnetic methods are the most popular methods. However, for low frequency vibration sources (e.g. civil engineering structures) Electromagnetic (EM) conversion mechanism is shown to produce a higher harvested power. On the other hand, in a more common application, EM transducers have been used for the structural vibration control as actuators in active control systems, or adjustable dampers in passive and semi-active control schemes. Therefore, the incorporation of adaptive EM damping and energy harvesting makes it possible to develop smart regenerative dampers. In this study, the main focus is the development of such control systems for vibration control of civil engineering structures. In that regard, a new self-powered hybrid electromagnetic damper is proposed that can harvest energy while mitigating the vibration of a structure by switching between two separate modes, namely passive energy harvesting and semi-active modes. The harvested energy stored in the battery during the passive mode is employed to power up the monitoring and electronic components necessary for the semi-active control. It is shown that in comparison with the other regenerative semi-active dampers, the new design increases the feasible force-velocity region that is available to the damper. This gives more flexibility to the damper to tackle the vibration more effectively. Besides, since the harvested power is random by nature, it is possible that the available energy is less than the operational requirement of the system. In that case, the damper can switch back to the passive mode, thus, energy outage does not negatively affect the control performance of the system. In the first part, the device mechanism and the circuitry that can drive this self-powered electromagnetic damper are described. The parameters that determine the constitutive force-velocity relation of the damper are identified and discussed. Next, a prototype of the damper is designed and tested under different harmonic excitations. The mechanical and electrical characteristics of both passive and semi-active modes were investigated and verified. The average harvested power and current were measured, and the efficiency of different parts of the damper is determined. Afterward, the effectiveness of the hybrid damper is evaluated through numerical simulation study on vibration mitigation of a bridge stay cable under wind excitation. It is demonstrated that the proposed hybrid design outperforms the conventional passive damper without external power supply. It is also shown that a broader force range, facilitated by decoupled passive and semi-active modes, can improve the…

Subjects/Keywords: Structural dynamics ; Measurement ; Mathematical models ; Structural analysis (Engineering) ; Electromagnetic devices ; Damping (Mechanics)

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Jamshidi, M. C. (2018). Development of a new regenerative electromagnetic damper for vibration control of civil engineering structures. (Thesis). Hong Kong University of Science and Technology. Retrieved from http://repository.ust.hk/ir/Record/1783.1-92264 ; https://doi.org/10.14711/thesis-991012588466403412 ; http://repository.ust.hk/ir/bitstream/1783.1-92264/1/th_redirect.html

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Jamshidi, Maziar CIVL. “Development of a new regenerative electromagnetic damper for vibration control of civil engineering structures.” 2018. Thesis, Hong Kong University of Science and Technology. Accessed April 17, 2021. http://repository.ust.hk/ir/Record/1783.1-92264 ; https://doi.org/10.14711/thesis-991012588466403412 ; http://repository.ust.hk/ir/bitstream/1783.1-92264/1/th_redirect.html.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Jamshidi, Maziar CIVL. “Development of a new regenerative electromagnetic damper for vibration control of civil engineering structures.” 2018. Web. 17 Apr 2021.

Vancouver:

Jamshidi MC. Development of a new regenerative electromagnetic damper for vibration control of civil engineering structures. [Internet] [Thesis]. Hong Kong University of Science and Technology; 2018. [cited 2021 Apr 17]. Available from: http://repository.ust.hk/ir/Record/1783.1-92264 ; https://doi.org/10.14711/thesis-991012588466403412 ; http://repository.ust.hk/ir/bitstream/1783.1-92264/1/th_redirect.html.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Jamshidi MC. Development of a new regenerative electromagnetic damper for vibration control of civil engineering structures. [Thesis]. Hong Kong University of Science and Technology; 2018. Available from: http://repository.ust.hk/ir/Record/1783.1-92264 ; https://doi.org/10.14711/thesis-991012588466403412 ; http://repository.ust.hk/ir/bitstream/1783.1-92264/1/th_redirect.html

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

17. Chagneau, Anthony. Méthode de zoom structural étendue aux hétérogénéités non linéaires. : A structural multiscale zooming method extended to non linearheterogeneous media.

Degree: Docteur es, Mécanique et Génie Civil, 2019, Montpellier

URL: http://www.theses.fr/2019MONTS051

►

Une approche multi-échelle introduit une méthode de zoom structural dans une zone d’intérêt, appelé le patch, utilisant uniquement des opérateurs de projection de champs. Les… (more)

▼

Une approche multi-échelle introduit une méthode de zoom structural dans une zone d’intérêt, appelé le patch, utilisant uniquement des opérateurs de projection de champs. Les différents comportements dans le patch et dans la structure globale sont pris en compte sans utiliser des paramètres de poids entre énergies locales et globales comme la méthode Arlequin. Notre problème initial est de fiabiliser numériquement la méthode de zoom structural pour le cas linéaire, et plus précisément de choisir un solveur performant sur les espaces de Krylov, ainsi qu’un préconditionnement et une rénumérotation efficaces et adaptés au système à résoudre. Une fois le solveur choisi, cette approche est validée mécanique sur deux essais, un de traction et l’autre de cisaillement. Une étude paramétrique sur le patch est effectué afin d’obtenir une solution acceptable. L’objectif suivant est d’étendre cette approche à des régions comportant des hétérogénéités à comportement non linéaire. On s’est intéressé au comportement élastoplastique. L’hypothèse de départ est de considérer le comportement élastoplastique uniquement à l’intérieur du patch et un comportement élastique sur la structure globale ainsi que sur la zone de raccord. On valide ensuite cette approche avec différents essais comprenant plusieurs défauts et donc plusieurs patchs ainsi que des histoire de chargement différents.

A multi-scale approach introduces a structural zoom method into a region of interest, called the patch, using only field projection operators. The different behaviours in the patch and in the overall structure are taken into account without using weight parameters between local and global energies such as the Arlequin method. Our initial problem is to digitally reliable the structural zoom method for the linear case, and more precisely to choose a high-performance solver on Krylov spaces, as well as effective preconditioning and ordering adapted to the system to be solved. Once the solver is chosen, this approach is mechanically validated in the mean of two tests, namely traction and shear. A parametric study of the patch is performed to obtain an acceptable solution. The next objective is to extend this approach to regions with heterogeneities of non-linear behaviour. The method has been reached out for elastoplastic behaviour. Initial hypothesis assumes the elastoplastic behaviour only inside the patch and an elastic behaviour of the overall structure as well as of the gluing area. Finally, this approach is validated with different tests including several faults and therefore several patches as well as different loading history.

Advisors/Committee Members: Pagano, Stéphane (thesis director), Alart, Pierre (thesis director).

Subjects/Keywords: Zoom structural; Mécanique; Éléments finis; Structural multiscale zooming method; Mechanics; Finite element

Record Details Similar Records Cite « Share

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Chagneau, A. (2019). Méthode de zoom structural étendue aux hétérogénéités non linéaires. : A structural multiscale zooming method extended to non linearheterogeneous media. (Doctoral Dissertation). Montpellier. Retrieved from http://www.theses.fr/2019MONTS051

Chicago Manual of Style (16^th Edition):

Chagneau, Anthony. “Méthode de zoom structural étendue aux hétérogénéités non linéaires. : A structural multiscale zooming method extended to non linearheterogeneous media.” 2019. Doctoral Dissertation, Montpellier. Accessed April 17, 2021. http://www.theses.fr/2019MONTS051.

MLA Handbook (7^th Edition):

Chagneau, Anthony. “Méthode de zoom structural étendue aux hétérogénéités non linéaires. : A structural multiscale zooming method extended to non linearheterogeneous media.” 2019. Web. 17 Apr 2021.

Vancouver:

Chagneau A. Méthode de zoom structural étendue aux hétérogénéités non linéaires. : A structural multiscale zooming method extended to non linearheterogeneous media. [Internet] [Doctoral dissertation]. Montpellier; 2019. [cited 2021 Apr 17]. Available from: http://www.theses.fr/2019MONTS051.

Council of Science Editors:

Chagneau A. Méthode de zoom structural étendue aux hétérogénéités non linéaires. : A structural multiscale zooming method extended to non linearheterogeneous media. [Doctoral Dissertation]. Montpellier; 2019. Available from: http://www.theses.fr/2019MONTS051

University of Tasmania

18. Kjar, AR. An approach to structural analysis.

Degree: 1968, University of Tasmania

URL: https://eprints.utas.edu.au/20135/1/whole_KjarAnthonyR1968_thesis.pdf

► The purpose of this thesis is to present to the engineering profession a method of structural analysis which is peculiarly suited to the way engineers… (more)

▼ The purpose of this thesis is to present to the engineering profession a method of structural analysis which is peculiarly suited to the way engineers think. The range and the power of structural analysis are extended by careful study of the actual deformations of structures, leading to the formulation of simple mathematical models. The theme throughout this thesis is the deliberate effort to look for, and to describe characteristic shapes which define the deformed structure; general statements are obtained similar to the historically valuable models which used "plane sections remain plane" or "radial lines remain radial". Once an appreciation of the deformations of the structure is gained, the forces to sustain these deformations are then found easily. This is one of the oldest approaches of engineering analysis, and the most powerful methods of analysis of structures have been along these lines, Men like Galileo, Parent, Navier, Bernoulli, and Ooidoimb developed an appreciation of structural behaviour by looking for simple geometric characteristics which would describe the deformed shape of the structure. (We may note also that Kepler's purely geometric study of the motions of the planets paved the way for Newton's formulation of his laws). And todayp when one tries to visualize and calculate the deformations of a bent beam, it is difficult to improve upon the first overall approximation that plane sections remain plane. The key to obtaining a simple mathematical model of a real problem is to start with a simple physical or laboratory model. Simple geometric approximations are then obtained by fitting an analytic function to the form of the deformations of the simple structure. The functional form is chosen so that the strains, the stresses, and hence the overall statical equilibrium of the structure can be evaluated. With this basis on which thoughts can be focussed, the laboratory and mathematical models can be improved to be a closer representation of the real problem. This approach reduces the need to test full size structures, as the geometric functional form acts as the geometric scaling factor. When full size testing is carried out, model tests are still a valuable means of providing a quick overall picture. This picture can then be used to determine which important geometric deformations should be measured. At present, full size testing, although expensive, is still necessary as the relationships between the strength and the size of the material remain unanswered. Nevertheless, improvements in this field can be made; for example R.E. Rowe (Ref. 1) has shown that concrete mixtures can be scaled to produce the same geometric crack pattern as would be expected in the full size structure. An engineer is frequently using approximate overall characteristics of a simple model as a basis for obtaining further thoughts on the real problem. However, the inability to measure quickly the overall geometric deformations of a simple model has led to specialized full size structural tests, not by engineers, but by…

Subjects/Keywords: Structural analysis (Engineering); Deformations (Mechanics)

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APA (6^th Edition):

Kjar, A. (1968). An approach to structural analysis. (Thesis). University of Tasmania. Retrieved from https://eprints.utas.edu.au/20135/1/whole_KjarAnthonyR1968_thesis.pdf

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Kjar, AR. “An approach to structural analysis.” 1968. Thesis, University of Tasmania. Accessed April 17, 2021. https://eprints.utas.edu.au/20135/1/whole_KjarAnthonyR1968_thesis.pdf.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Kjar, AR. “An approach to structural analysis.” 1968. Web. 17 Apr 2021.

Vancouver:

Kjar A. An approach to structural analysis. [Internet] [Thesis]. University of Tasmania; 1968. [cited 2021 Apr 17]. Available from: https://eprints.utas.edu.au/20135/1/whole_KjarAnthonyR1968_thesis.pdf.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Kjar A. An approach to structural analysis. [Thesis]. University of Tasmania; 1968. Available from: https://eprints.utas.edu.au/20135/1/whole_KjarAnthonyR1968_thesis.pdf

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Adelaide

19. Feng, Qian. A mechanics simulation of the influence of reinforcement corrosion on RC beam behaviour.

Degree: 2016, University of Adelaide

URL: http://hdl.handle.net/2440/119485

► Corrosion influences both of the serviceability limit state and the ultimate limit state of the reinforced concrete structures. The mass loss of reinforcement caused by… (more)

▼ Corrosion influences both of the serviceability limit state and the ultimate limit state of the reinforced concrete structures. The mass loss of reinforcement caused by corrosion not only reduces cross sectional area of the reinforcement but also the bond between the steel reinforcement and surrounding concrete. By reducing the bond between the reinforcement and surrounding concrete, at serviceability limit state, corrosion may lead to an increase crack width and deflection, while at the ultimate limit state it may lead to reinforcement debonding. Hence, knowledge of the influence of corrosion on the bond between reinforcement and concrete is required to evaluate structural behaviour and extend the life span of the reinforced concrete structures. This thesis first investigates the influence of corrosion on bond properties yielding a new bond-slip material model which has been developed from the analysis of a large data base of 377 individual test results obtained from published experimental results. From the resulting bond-slip model it is shown the debonding of reinforcement may occur at relatively low levels of corrosion and that the influence of corrosion on bond is more significant corrosion for large bar diameters. Having developed a material model illustrating how corrosion influences the bond-slip relationship, the impact of corrosion on reinforced concrete beams is considered. Firstly the performance of beams at the ultimate limit state is considered through the development of a numerical segmental analysis technique to simulate member behaviour prior to and post debonding. Importantly this model shows that although debonding of reinforcement may occur at a relatively low level of corrosion, it does not always negatively impact member strength or ductility. The impact of reinforcement corrosion at the serviceability limit state is then considered through the extension of the segmental approach to incorporate not only the influence of bond but also concrete creep and shrinkage. The resulting model couples concrete creep and shrinkage with reinforcement corrosion and predicts the influence of each on crack width and member deflection. Significantly it is shown that reinforcement corrosion can be much more easily monitored through measurement of crack widths over time rather than through consideration of member deflection and the approach proposed may be used to provide guidance on the variation in reinforcement corrosion along a span. Advisors/Committee Members: Oehlers, Deric (advisor), Visintin, Phillip (advisor), Griffith, Michael (advisor), School of Civil, Environmental and Mining Engineering (school).

Subjects/Keywords: corrosion; reinforced concrete; bond-slip; structural behaviour; material model; mechanics solution

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APA (6^th Edition):

Feng, Q. (2016). A mechanics simulation of the influence of reinforcement corrosion on RC beam behaviour. (Thesis). University of Adelaide. Retrieved from http://hdl.handle.net/2440/119485

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Feng, Qian. “A mechanics simulation of the influence of reinforcement corrosion on RC beam behaviour.” 2016. Thesis, University of Adelaide. Accessed April 17, 2021. http://hdl.handle.net/2440/119485.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Feng, Qian. “A mechanics simulation of the influence of reinforcement corrosion on RC beam behaviour.” 2016. Web. 17 Apr 2021.

Vancouver:

Feng Q. A mechanics simulation of the influence of reinforcement corrosion on RC beam behaviour. [Internet] [Thesis]. University of Adelaide; 2016. [cited 2021 Apr 17]. Available from: http://hdl.handle.net/2440/119485.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Feng Q. A mechanics simulation of the influence of reinforcement corrosion on RC beam behaviour. [Thesis]. University of Adelaide; 2016. Available from: http://hdl.handle.net/2440/119485

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Arizona

20. Melvin, Dyan. Model Based Structural Monitoring of Plates using Kalman Filter .

Degree: 2016, University of Arizona

URL: http://hdl.handle.net/10150/621369

► Structural health monitoring (SHM) is a quickly advancing field of study in civil engineering and recent advances in the field are in stark contrast to… (more)

▼ Structural health monitoring (SHM) is a quickly advancing field of study in civil engineering and recent advances in the field are in stark contrast to where the field started. For example modern technology of wireless sensing systems allowed for easier monitoring of structures, but the challenge of limiting the number of instrumented locations has not been overcome with traditional methods. The potential of alternative methods has only been realized in recent years with the increase of model based approaches. In particular, the use of limited measurements to estimate structural response at all locations is appealing. To accomplish this goal, this work approaches SHM by using a numerical model combined with a linear recursive state estimation algorithm, known as the Kalman Filter, to update the model-based prediction with a limited number of real time measurements taken on the structure. A thorough overview of the contents is given here. The first section introduces the topic of SHM and the goal of SHM. Then the challenges and limitation that face SHM are discussed along with the recent advances that can be used to overcome them. In Section 2, the proposed framework, a Kalman filter approach, is established. First, a finite element model is formulated for plate structures using the Mindlin-Reissner plate theory and then this finite element code is verified by a comparison with a commercial FEA software. Then the state space model of the system is defined for use with the Augmented Kalman Filter (AKF); the AKF approach overcomes the intrinsic challenge of unknown excitations for civil structures. The AKF is then formulated and discussed. For Section 3, using the AKF in numerical simulations are conducted for 5 different cases. The first three cases study the advantages of multi-metric measurements, i.e. strain and acceleration measurements combined, versus single metric measurement, i.e. strain measurement only or acceleration measurement only. Following that, the next two cases explore the question of whether multi-metric measurements will always provide the best results. Based on the conclusions from the previous section, Section 4 investigates the application of a genetic algorithm, a search algorithm based of Darwinian principles, to find the optimal sensor placement to use as the input to the AKF. Here the developed search algorithm is used in two cases, the first is to find the optimal placement for the strain measurement only case. Next, the improvements in accuracy that are gained by placing taking more measurements is investigated to determine if the gain in accuracy per added measurement decreases for large numbers of measurements. Section 5 contains the final conclusions about the use of the AKF for SHM of plate structures then the potential opportunities of future work regarding plate structures are discussed. Advisors/Committee Members: Jo, Hongki (advisor), Fleischman, Robert (committeemember), Kundu, Tribikram (committeemember).

Subjects/Keywords: Plates; Structural Health Monitoring; Civil Engineering and Engineering Mechanics; Kalman Filter

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APA (6^th Edition):

Melvin, D. (2016). Model Based Structural Monitoring of Plates using Kalman Filter . (Masters Thesis). University of Arizona. Retrieved from http://hdl.handle.net/10150/621369

Chicago Manual of Style (16^th Edition):

Melvin, Dyan. “Model Based Structural Monitoring of Plates using Kalman Filter .” 2016. Masters Thesis, University of Arizona. Accessed April 17, 2021. http://hdl.handle.net/10150/621369.

MLA Handbook (7^th Edition):

Melvin, Dyan. “Model Based Structural Monitoring of Plates using Kalman Filter .” 2016. Web. 17 Apr 2021.

Vancouver:

Melvin D. Model Based Structural Monitoring of Plates using Kalman Filter . [Internet] [Masters thesis]. University of Arizona; 2016. [cited 2021 Apr 17]. Available from: http://hdl.handle.net/10150/621369.

Council of Science Editors:

Melvin D. Model Based Structural Monitoring of Plates using Kalman Filter . [Masters Thesis]. University of Arizona; 2016. Available from: http://hdl.handle.net/10150/621369

University of Arizona

21. Hansen, Stanley Dee, 1934-. Analysis of structural systems having large deflections .

Degree: 1965, University of Arizona

URL: http://hdl.handle.net/10150/318437

Subjects/Keywords: Structural analysis (Engineering); Deformations (Mechanics)

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APA (6^th Edition):

Hansen, Stanley Dee, 1. (1965). Analysis of structural systems having large deflections . (Masters Thesis). University of Arizona. Retrieved from http://hdl.handle.net/10150/318437

Chicago Manual of Style (16^th Edition):

Hansen, Stanley Dee, 1934-. “Analysis of structural systems having large deflections .” 1965. Masters Thesis, University of Arizona. Accessed April 17, 2021. http://hdl.handle.net/10150/318437.

MLA Handbook (7^th Edition):

Hansen, Stanley Dee, 1934-. “Analysis of structural systems having large deflections .” 1965. Web. 17 Apr 2021.

Vancouver:

Hansen, Stanley Dee 1. Analysis of structural systems having large deflections . [Internet] [Masters thesis]. University of Arizona; 1965. [cited 2021 Apr 17]. Available from: http://hdl.handle.net/10150/318437.

Council of Science Editors:

Hansen, Stanley Dee 1. Analysis of structural systems having large deflections . [Masters Thesis]. University of Arizona; 1965. Available from: http://hdl.handle.net/10150/318437

Georgia Tech

22. Rapp, Ira Hammes. Snap-through buckling of shallow arches with nonuniform stiffness under dynamic and quasi-static loadings.

Degree: PhD, Engineering mechanics, 1974, Georgia Tech

URL: http://hdl.handle.net/1853/18976

Subjects/Keywords: Buckling (Mechanics); Arches; Structural dynamics

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APA (6^th Edition):

Rapp, I. H. (1974). Snap-through buckling of shallow arches with nonuniform stiffness under dynamic and quasi-static loadings. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/18976

Chicago Manual of Style (16^th Edition):

Rapp, Ira Hammes. “Snap-through buckling of shallow arches with nonuniform stiffness under dynamic and quasi-static loadings.” 1974. Doctoral Dissertation, Georgia Tech. Accessed April 17, 2021. http://hdl.handle.net/1853/18976.

MLA Handbook (7^th Edition):

Rapp, Ira Hammes. “Snap-through buckling of shallow arches with nonuniform stiffness under dynamic and quasi-static loadings.” 1974. Web. 17 Apr 2021.

Vancouver:

Rapp IH. Snap-through buckling of shallow arches with nonuniform stiffness under dynamic and quasi-static loadings. [Internet] [Doctoral dissertation]. Georgia Tech; 1974. [cited 2021 Apr 17]. Available from: http://hdl.handle.net/1853/18976.

Council of Science Editors:

Rapp IH. Snap-through buckling of shallow arches with nonuniform stiffness under dynamic and quasi-static loadings. [Doctoral Dissertation]. Georgia Tech; 1974. Available from: http://hdl.handle.net/1853/18976

Georgia Tech

23. Caldwell, Hartley McMullin. Optimization of shallow arches against snap-through buckling.

Degree: PhD, Engineering mechanics, 1977, Georgia Tech

URL: http://hdl.handle.net/1853/15493

Subjects/Keywords: Arches; Buckling (Mechanics); Structural stability

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APA (6^th Edition):

Caldwell, H. M. (1977). Optimization of shallow arches against snap-through buckling. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/15493

Chicago Manual of Style (16^th Edition):

Caldwell, Hartley McMullin. “Optimization of shallow arches against snap-through buckling.” 1977. Doctoral Dissertation, Georgia Tech. Accessed April 17, 2021. http://hdl.handle.net/1853/15493.

MLA Handbook (7^th Edition):

Caldwell, Hartley McMullin. “Optimization of shallow arches against snap-through buckling.” 1977. Web. 17 Apr 2021.

Vancouver:

Caldwell HM. Optimization of shallow arches against snap-through buckling. [Internet] [Doctoral dissertation]. Georgia Tech; 1977. [cited 2021 Apr 17]. Available from: http://hdl.handle.net/1853/15493.

Council of Science Editors:

Caldwell HM. Optimization of shallow arches against snap-through buckling. [Doctoral Dissertation]. Georgia Tech; 1977. Available from: http://hdl.handle.net/1853/15493

Georgia Tech

24. Nassar, Esam Eldin. On the dynamic characteristics of beams, plates and shells.

Degree: PhD, Aerospace Engineering, 1973, Georgia Tech

URL: http://hdl.handle.net/1853/12095

Subjects/Keywords: Structural stability; Buckling (Mechanics)

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APA (6^th Edition):

Nassar, E. E. (1973). On the dynamic characteristics of beams, plates and shells. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/12095

Chicago Manual of Style (16^th Edition):

Nassar, Esam Eldin. “On the dynamic characteristics of beams, plates and shells.” 1973. Doctoral Dissertation, Georgia Tech. Accessed April 17, 2021. http://hdl.handle.net/1853/12095.

MLA Handbook (7^th Edition):

Nassar, Esam Eldin. “On the dynamic characteristics of beams, plates and shells.” 1973. Web. 17 Apr 2021.

Vancouver:

Nassar EE. On the dynamic characteristics of beams, plates and shells. [Internet] [Doctoral dissertation]. Georgia Tech; 1973. [cited 2021 Apr 17]. Available from: http://hdl.handle.net/1853/12095.

Council of Science Editors:

Nassar EE. On the dynamic characteristics of beams, plates and shells. [Doctoral Dissertation]. Georgia Tech; 1973. Available from: http://hdl.handle.net/1853/12095

Georgia Tech

25. Chaudhari, Sopan Narayan. The instability of partially restrained columns and plates.

Degree: PhD, Aeronautical Engineering, 1973, Georgia Tech

URL: http://hdl.handle.net/1853/12356

Subjects/Keywords: Structural stability; Buckling (Mechanics)

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APA (6^th Edition):

Chaudhari, S. N. (1973). The instability of partially restrained columns and plates. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/12356

Chicago Manual of Style (16^th Edition):

Chaudhari, Sopan Narayan. “The instability of partially restrained columns and plates.” 1973. Doctoral Dissertation, Georgia Tech. Accessed April 17, 2021. http://hdl.handle.net/1853/12356.

MLA Handbook (7^th Edition):

Chaudhari, Sopan Narayan. “The instability of partially restrained columns and plates.” 1973. Web. 17 Apr 2021.

Vancouver:

Chaudhari SN. The instability of partially restrained columns and plates. [Internet] [Doctoral dissertation]. Georgia Tech; 1973. [cited 2021 Apr 17]. Available from: http://hdl.handle.net/1853/12356.

Council of Science Editors:

Chaudhari SN. The instability of partially restrained columns and plates. [Doctoral Dissertation]. Georgia Tech; 1973. Available from: http://hdl.handle.net/1853/12356

University of Hong Kong

26. Wei, Yong. On fatigue failure prediction with damage mechanics: theory and application.

Degree: 1993, University of Hong Kong

URL: http://hdl.handle.net/10722/34268

Subjects/Keywords: Fatigue.; Fracture mechanics.; Structural engineering.

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APA (6^th Edition):

Wei, Y. (1993). On fatigue failure prediction with damage mechanics: theory and application. (Thesis). University of Hong Kong. Retrieved from http://hdl.handle.net/10722/34268

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Wei, Yong. “On fatigue failure prediction with damage mechanics: theory and application.” 1993. Thesis, University of Hong Kong. Accessed April 17, 2021. http://hdl.handle.net/10722/34268.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Wei, Yong. “On fatigue failure prediction with damage mechanics: theory and application.” 1993. Web. 17 Apr 2021.

Vancouver:

Wei Y. On fatigue failure prediction with damage mechanics: theory and application. [Internet] [Thesis]. University of Hong Kong; 1993. [cited 2021 Apr 17]. Available from: http://hdl.handle.net/10722/34268.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Wei Y. On fatigue failure prediction with damage mechanics: theory and application. [Thesis]. University of Hong Kong; 1993. Available from: http://hdl.handle.net/10722/34268

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Hong Kong

27. Ko, Jan-ming. Behaviour under lateral loading of rectangular framed structures stiffened with shear walls.

Degree: 1969, University of Hong Kong

URL: http://hdl.handle.net/10722/34933

Subjects/Keywords: Structural frames.; Shear (Mechanics)

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APA (6^th Edition):

Ko, J. (1969). Behaviour under lateral loading of rectangular framed structures stiffened with shear walls. (Thesis). University of Hong Kong. Retrieved from http://hdl.handle.net/10722/34933

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Ko, Jan-ming. “Behaviour under lateral loading of rectangular framed structures stiffened with shear walls.” 1969. Thesis, University of Hong Kong. Accessed April 17, 2021. http://hdl.handle.net/10722/34933.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Ko, Jan-ming. “Behaviour under lateral loading of rectangular framed structures stiffened with shear walls.” 1969. Web. 17 Apr 2021.

Vancouver:

Ko J. Behaviour under lateral loading of rectangular framed structures stiffened with shear walls. [Internet] [Thesis]. University of Hong Kong; 1969. [cited 2021 Apr 17]. Available from: http://hdl.handle.net/10722/34933.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Ko J. Behaviour under lateral loading of rectangular framed structures stiffened with shear walls. [Thesis]. University of Hong Kong; 1969. Available from: http://hdl.handle.net/10722/34933

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

28. Svensson, Natasha. Thermo-mechanical modelling of structural battery composites .

Degree: Chalmers tekniska högskola / Institutionen för industri- och materialvetenskap, 2020, Chalmers University of Technology

URL: http://hdl.handle.net/20.500.12380/301574

► Industries are searching for energy efficient zero-emission transport solutions to minimise environmental impact from transportation [1]. A possible solution to this can be the use… (more)

▼ Industries are searching for energy efficient zero-emission transport solutions to minimise environmental impact from transportation [1]. A possible solution to this can be the use of structural battery composites which combines the ability to take mechanical load while also store electrical energy [1], i.e. combining the functionalities of structures and batteries. The aim of this thesis is to develop a model which can predict the thermo-mechanical behaviour of a laminated structural battery composite. It is conducted in collaboration with an other master’s thesis which instead focus on the battery modelling [2]. The laminated structural battery composite studied in this project has a similar structure to a regular Li-ion battery. The simplified model, made in comsol, was constructed as a three-layered battery unit cell where each layer’s properties was approximated by using composite micro-mechanics models. The boundary conditions were such that only the top boundary was allowed to move while having a convective heat flux applied. As the behaviour is only modelled (numerical investigation), i.e. no manufacturing or testing was conducted on real batteries, there is no way to know how good the modelled prediction actually compares to the reality. Instead investigation is made as a sensitivity study, to see how different parameters change the outcome which includes time, generated heat in the battery cell, heat transfer coefficient of the heat flux and thicknesses of the different layers. The results show that after some time a steady state temperature will be reached as long as the heat transfer coefficient is non-zero. This steady state temperature is important for future thermal experiments as a too low temperature will give misleading results. This thesis has though shown that it can be controlled by changing e.g. the generated heat from the battery cell by changing the C-rate or the heat exchange with the surroundings. The conclusion is therefore that this developed framework, in combination with the collaborated thesis [2], can be used to guide future experiments on the thermo-mechanical behaviour of a laminated structural battery composite.

Subjects/Keywords: Structural battery composite; comsol; Finite Element; composite mechanics; thermal-mechanical behaviour

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APA (6^th Edition):

Svensson, N. (2020). Thermo-mechanical modelling of structural battery composites . (Thesis). Chalmers University of Technology. Retrieved from http://hdl.handle.net/20.500.12380/301574

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Svensson, Natasha. “Thermo-mechanical modelling of structural battery composites .” 2020. Thesis, Chalmers University of Technology. Accessed April 17, 2021. http://hdl.handle.net/20.500.12380/301574.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Svensson, Natasha. “Thermo-mechanical modelling of structural battery composites .” 2020. Web. 17 Apr 2021.

Vancouver:

Svensson N. Thermo-mechanical modelling of structural battery composites . [Internet] [Thesis]. Chalmers University of Technology; 2020. [cited 2021 Apr 17]. Available from: http://hdl.handle.net/20.500.12380/301574.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Svensson N. Thermo-mechanical modelling of structural battery composites . [Thesis]. Chalmers University of Technology; 2020. Available from: http://hdl.handle.net/20.500.12380/301574

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Cambridge

29. Walker, Martin. Flexural mechanics of creased thin metallic strips.

Degree: PhD, 2018, University of Cambridge

URL: https://doi.org/10.17863/CAM.24199 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.744919

► The introduction of creases into thin sheets has a dramatic effect on their global mechanical properties. This can be observed by manipulating a crumpled piece… (more)

▼ The introduction of creases into thin sheets has a dramatic effect on their global mechanical properties. This can be observed by manipulating a crumpled piece of paper which has been unfolded; it no longer deforms in the same way as the original sheet. Creases have typically been modelled as singular hinge lines, often accompanied by a torsional spring to provide some opening resistance; however, the appropriate stiffness of these springs is unclear. In reality, creases have a discrete geometry based on the method they were formed. This dissertation investigates the flexural behaviour of a creased thin metallic strip and the influence of the crease geometry. When a strip is bent perpendicular to the crease, putting the crease region in tension and the strip edges in compression, initially torsional deformations occur which ultimately coalesce into a central localised flattened region. An analytical model of this flexural behaviour is developed, which idealises the crease as an initially circular segment. Predictions show the bending resistance increases as the crease decreases in size. The model predictions are compared to finite element analysis and experimental results showing excellent agreement. When a strip is bent in the opposite direction, with the crease region in compression and the strip edges in tension, a bistable snap-through occurs. The deformed shape is characterised by a sharp vertex on the crease line. An analytical model is developed by generalising a Gauss mapping approach, and used to predict the deformed shape. These predictions match experimental results well. This dissertation provides an understanding of the mechanics of creased thin strips, where the crease is given a discrete geometry, and explores the nature of localisation. It also provides the foundation to explore the mechanics of thin sheets featuring a network of creases. This offers the opportunity to improve the efficiency of thin shell structures by using creasing to optimise the mechanics, leading to reduced material use, more sustainable construction, and fuel savings from lighter vehicles.

Subjects/Keywords: 669; Creasing; Localisation; Folding; Origami; Structural Mechanics; Shells

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APA (6^th Edition):

Walker, M. (2018). Flexural mechanics of creased thin metallic strips. (Doctoral Dissertation). University of Cambridge. Retrieved from https://doi.org/10.17863/CAM.24199 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.744919

Chicago Manual of Style (16^th Edition):

Walker, Martin. “Flexural mechanics of creased thin metallic strips.” 2018. Doctoral Dissertation, University of Cambridge. Accessed April 17, 2021. https://doi.org/10.17863/CAM.24199 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.744919.

MLA Handbook (7^th Edition):

Walker, Martin. “Flexural mechanics of creased thin metallic strips.” 2018. Web. 17 Apr 2021.

Vancouver:

Walker M. Flexural mechanics of creased thin metallic strips. [Internet] [Doctoral dissertation]. University of Cambridge; 2018. [cited 2021 Apr 17]. Available from: https://doi.org/10.17863/CAM.24199 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.744919.

Council of Science Editors:

Walker M. Flexural mechanics of creased thin metallic strips. [Doctoral Dissertation]. University of Cambridge; 2018. Available from: https://doi.org/10.17863/CAM.24199 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.744919

University of British Columbia

30. Egerup, Arne Ryden. Lateral stability of two-and three-hinged glulam arches.

Degree: Master of Applied Science - MASc, Civil Engineering, 1972, University of British Columbia

URL: http://hdl.handle.net/2429/33335

► This thesis presents the results of a theoretical and experimental study of the lateral buckling of two- and three-hinged arches of rectangular cross-section with laterally… (more)

Subjects/Keywords: Buckling (Mechanics); Structural analysis (Engineering)

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APA (6^th Edition):

Egerup, A. R. (1972). Lateral stability of two-and three-hinged glulam arches. (Masters Thesis). University of British Columbia. Retrieved from http://hdl.handle.net/2429/33335

Chicago Manual of Style (16^th Edition):

Egerup, Arne Ryden. “Lateral stability of two-and three-hinged glulam arches.” 1972. Masters Thesis, University of British Columbia. Accessed April 17, 2021. http://hdl.handle.net/2429/33335.

MLA Handbook (7^th Edition):

Egerup, Arne Ryden. “Lateral stability of two-and three-hinged glulam arches.” 1972. Web. 17 Apr 2021.

Vancouver:

Egerup AR. Lateral stability of two-and three-hinged glulam arches. [Internet] [Masters thesis]. University of British Columbia; 1972. [cited 2021 Apr 17]. Available from: http://hdl.handle.net/2429/33335.

Council of Science Editors:

Egerup AR. Lateral stability of two-and three-hinged glulam arches. [Masters Thesis]. University of British Columbia; 1972. Available from: http://hdl.handle.net/2429/33335

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