subject:(smooth particle hydrodynamics)

Delft University of Technology

1. Koning, Jasper (author). Simulating Bending Failure of Ice using Smoothed Particle Hydrodynamics: A re-usable framework for simulating of fluid problems using SPH.

Degree: 2019, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:b71b44a5-a5bc-465a-bac9-f81dcbcca857

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The offshore industry is a conservative industry, sticking to rigid best-practices and reluctant to try new techniques. A promising new technique that hasn't found much… (more)

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The offshore industry is a conservative industry, sticking to rigid best-practices and reluctant to try new techniques. A promising new technique that hasn't found much adoption in offshore industry is SPH. This thesis aims to improve the reach and use of SPH within the offshore industry. With an abundance of world's unexplored hydrocarbons located in the Arctic Region, 18%, ice-structure interactions (ISI) are set to increase. Modeling these ISI requires complex dynamics, SPH can model these ISI dynamics without extra treatment. SPH works by interpolation of a set of neighbouring particles using a weighing function. This modeling technique offers many advantages over conventional rules-of-thumb, Finite Element Modeling (FEM), and Finite Volume (FV) methods. SPH is a particle based method, thus, uniquely suited for problems with large displacements, or discontinuities. However, in the standard, weakly-compressible (WCSPH) method spurious pressure fluctuations and particle clustering can occur. By implementing the plethora of correction methods and equations present in literature, such as kernel corrections, incompressible variants, or density corrections, these drawbacks can be circumvented and a robust framework can be formed. An implementation of WCSPH that focuses on adaptability and flexibility is presented in this work. The flexibility of the implementation allows future researchers to focus on the core of their research, only changing the equations they are interested in, instead of implementing all the required equations for a full SPH simulation. A validation study of the implementation assures that it matches closely with existing implementations and real-world results. The mathematical model developed in Keijdener (2018) is implemented in the proposed WCSPH implementation. Comparing the results shows close agreement for the breaking length. However, significant differences are present in the failure time results. Despite this it shows the possibility of combining solid mechanics with SPH, and validates the integration method, solver, and SPH model.

Offshore and dredging engineering

Advisors/Committee Members: Keijdener, Chris (mentor), Metrikine, Andrei (mentor), Delft University of Technology (degree granting institution).

Subjects/Keywords: SPH; ISI; Simulation; Smooth particle hydrodynamics

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APA (6^th Edition):

Koning, J. (. (2019). Simulating Bending Failure of Ice using Smoothed Particle Hydrodynamics: A re-usable framework for simulating of fluid problems using SPH. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:b71b44a5-a5bc-465a-bac9-f81dcbcca857

Chicago Manual of Style (16^th Edition):

Koning, Jasper (author). “Simulating Bending Failure of Ice using Smoothed Particle Hydrodynamics: A re-usable framework for simulating of fluid problems using SPH.” 2019. Masters Thesis, Delft University of Technology. Accessed January 27, 2021. http://resolver.tudelft.nl/uuid:b71b44a5-a5bc-465a-bac9-f81dcbcca857.

MLA Handbook (7^th Edition):

Koning, Jasper (author). “Simulating Bending Failure of Ice using Smoothed Particle Hydrodynamics: A re-usable framework for simulating of fluid problems using SPH.” 2019. Web. 27 Jan 2021.

Vancouver:

Koning J(. Simulating Bending Failure of Ice using Smoothed Particle Hydrodynamics: A re-usable framework for simulating of fluid problems using SPH. [Internet] [Masters thesis]. Delft University of Technology; 2019. [cited 2021 Jan 27]. Available from: http://resolver.tudelft.nl/uuid:b71b44a5-a5bc-465a-bac9-f81dcbcca857.

Council of Science Editors:

Koning J(. Simulating Bending Failure of Ice using Smoothed Particle Hydrodynamics: A re-usable framework for simulating of fluid problems using SPH. [Masters Thesis]. Delft University of Technology; 2019. Available from: http://resolver.tudelft.nl/uuid:b71b44a5-a5bc-465a-bac9-f81dcbcca857

Delft University of Technology

2. Been, S.K. (author). Smoothed Particle Hydrodynamic Modelling of Wave Impact: A numerical and theoretical analysis of non-breaking wave loads on structures with overhang.

Degree: 2020, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:da456924-c5e4-4e93-8780-cc0853850ddc

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Hydraulic structures can be prone to impulsive wave impact, which is a highly stochastic and uncertain process. This type of impact, defined by extreme pressure… (more)

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Hydraulic structures can be prone to impulsive wave impact, which is a highly stochastic and uncertain process. This type of impact, defined by extreme pressure peaks and a very short duration, is not only caused by breaking waves, but also by non-breaking standing waves on structures with an overhang, such as culverts and steel gates. In this study, the capabilities of the Lagrangian numerical tool Smoothed Particle Hydrodynamics (SPH) are validated by means of experimental research conducted at the Hydraulics lab of the Delft university of Technology, in which two short overhang configurations were subjected to multiple non-breaking wave conditions. SPH distinguishes itself by discretizing the numerical domain in particles instead of a grid, unlike traditional computational fluid dynamics (CFD). In doing so, it excels in free surface modelling and complex wave-structure interaction. In this thesis, the theory of pressure-impulse is applied, which is defined as the integral of the pressure over the impact duration. This method is more stable than using pressure peaks and can be used to obtain the reaction forces on hydraulic structures. However, the theory is in development and subject of recent literature. This research includes the theoretical pressure-impulse model, which is based on the Laplace equation and solely includes the vertical impact by assuming a circular profile under the overhang with a constant impact velocity. Furthermore, a new conceptual model is introduced, which is based on integration by the particle velocities in both horizontal and vertical direction as described by Linear Wave Theory. The assumptions of the velocity fields of both models are assessed by the SPH method. As a result, modifications are proposed to the conceptual model and validated with the experiment. SPH shows good agreement with the experiment in terms of wave generation, pressure distribution and pressure-impulse profile. However, the lack of air in the numerical model result in overestimations of the pressure peaks. The more air is entrapped in the experimental wave impact, the higher the deviation. That said, the impact duration also becomes longer the more air is entrapped while the SPH model shows a somewhat constant and shorter duration. As a result, the pressure-impulse profiles shows corrective behavior over the vertical, mitigates the absence of air and thus greatly increases the accuracy and stability of the results. Finally, an analytical validation is performed in which the theoretical models for overhang configurations and design formulae for vertical walls are compared to SPH and the experiment.

Hydraulic Engineering | Hydraulic Structures and Flood Risk

Advisors/Committee Members: Antonini, A. (mentor), Molenaar, W.F. (graduation committee), de Almeida Sousa, E. (graduation committee), Bricker, J.D. (graduation committee), Kostense, N.W. (graduation committee), Tuin, H.G. (graduation committee), Delft University of Technology (degree granting institution).

Subjects/Keywords: Smooth particle hydrodynamics; Wave impacts; Pressure impulse; Numerical modelling; Hydraulic structures

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

APA (6^th Edition):

Been, S. K. (. (2020). Smoothed Particle Hydrodynamic Modelling of Wave Impact: A numerical and theoretical analysis of non-breaking wave loads on structures with overhang. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:da456924-c5e4-4e93-8780-cc0853850ddc

Chicago Manual of Style (16^th Edition):

Been, S K (author). “Smoothed Particle Hydrodynamic Modelling of Wave Impact: A numerical and theoretical analysis of non-breaking wave loads on structures with overhang.” 2020. Masters Thesis, Delft University of Technology. Accessed January 27, 2021. http://resolver.tudelft.nl/uuid:da456924-c5e4-4e93-8780-cc0853850ddc.

MLA Handbook (7^th Edition):

Been, S K (author). “Smoothed Particle Hydrodynamic Modelling of Wave Impact: A numerical and theoretical analysis of non-breaking wave loads on structures with overhang.” 2020. Web. 27 Jan 2021.

Vancouver:

Been SK(. Smoothed Particle Hydrodynamic Modelling of Wave Impact: A numerical and theoretical analysis of non-breaking wave loads on structures with overhang. [Internet] [Masters thesis]. Delft University of Technology; 2020. [cited 2021 Jan 27]. Available from: http://resolver.tudelft.nl/uuid:da456924-c5e4-4e93-8780-cc0853850ddc.

Council of Science Editors:

Been SK(. Smoothed Particle Hydrodynamic Modelling of Wave Impact: A numerical and theoretical analysis of non-breaking wave loads on structures with overhang. [Masters Thesis]. Delft University of Technology; 2020. Available from: http://resolver.tudelft.nl/uuid:da456924-c5e4-4e93-8780-cc0853850ddc

Rochester Institute of Technology

3. Ponce Castro, J. Marcelo. Event horizons, gravitational waves and astrophysical kicks in black-hole spacetimes.

Degree: PhD, School of Physics and Astronomy (COS), 2011, Rochester Institute of Technology

URL: https://scholarworks.rit.edu/theses/39

► In this thesis we use computational techniques (numerical simulations) to study different stages of black hole mergers. A first project describes topological properties of the… (more)

Subjects/Keywords: Black holes; Computational astrophysics; Event horizons; Gravitational recoils; Numerical relativity; Smooth particle hydrodynamics

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APA (6^th Edition):

Ponce Castro, J. M. (2011). Event horizons, gravitational waves and astrophysical kicks in black-hole spacetimes. (Doctoral Dissertation). Rochester Institute of Technology. Retrieved from https://scholarworks.rit.edu/theses/39

Chicago Manual of Style (16^th Edition):

Ponce Castro, J Marcelo. “Event horizons, gravitational waves and astrophysical kicks in black-hole spacetimes.” 2011. Doctoral Dissertation, Rochester Institute of Technology. Accessed January 27, 2021. https://scholarworks.rit.edu/theses/39.

MLA Handbook (7^th Edition):

Ponce Castro, J Marcelo. “Event horizons, gravitational waves and astrophysical kicks in black-hole spacetimes.” 2011. Web. 27 Jan 2021.

Vancouver:

Ponce Castro JM. Event horizons, gravitational waves and astrophysical kicks in black-hole spacetimes. [Internet] [Doctoral dissertation]. Rochester Institute of Technology; 2011. [cited 2021 Jan 27]. Available from: https://scholarworks.rit.edu/theses/39.

Council of Science Editors:

Ponce Castro JM. Event horizons, gravitational waves and astrophysical kicks in black-hole spacetimes. [Doctoral Dissertation]. Rochester Institute of Technology; 2011. Available from: https://scholarworks.rit.edu/theses/39

4. Begnert, Joel. Combining Regional Time Stepping With Two-Scale PCISPH Method.

Degree: 2015, , Department of Computer Science and Engineering

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:bth-10948

► Context. In computer graphics, realistic looking fluid is often desired. Simulating realistic fluids is a time consuming and computationally expensive task, therefore, much research… (more)

Subjects/Keywords: smooth particle hydrodynamics; two-scale; regional time stepping; fluid simulation; Computer Sciences; Datavetenskap (datalogi)

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APA (6^th Edition):

Begnert, J. (2015). Combining Regional Time Stepping With Two-Scale PCISPH Method. (Thesis). , Department of Computer Science and Engineering. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:bth-10948

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):

Begnert, Joel. “Combining Regional Time Stepping With Two-Scale PCISPH Method.” 2015. Thesis, , Department of Computer Science and Engineering. Accessed January 27, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-10948.

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

MLA Handbook (7^th Edition):

Begnert, Joel. “Combining Regional Time Stepping With Two-Scale PCISPH Method.” 2015. Web. 27 Jan 2021.

Vancouver:

Begnert J. Combining Regional Time Stepping With Two-Scale PCISPH Method. [Internet] [Thesis]. , Department of Computer Science and Engineering; 2015. [cited 2021 Jan 27]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:bth-10948.

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

Council of Science Editors:

Begnert J. Combining Regional Time Stepping With Two-Scale PCISPH Method. [Thesis]. , Department of Computer Science and Engineering; 2015. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:bth-10948

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

Delft University of Technology

5. Salet, Jesse (author). Tsunami induced failure of bridges: Determining failure modes with the use of SPH-modeling.

Degree: 2019, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:56d1ccc2-b50a-44a6-9908-d5f495c6951c

► Recent major tsunami events generated by earthquakes inundated coastal cities and caused extreme destruction and loss of human lives. The collapse of coastal bridges due… (more)

▼ Recent major tsunami events generated by earthquakes inundated coastal cities and caused extreme destruction and loss of human lives. The collapse of coastal bridges due to tsunami wave impact represents a huge obstacle for rescue works. The need to understand tsunami effects and develop tsunami-resilient bridges became apparent in the aftermath of extreme tsunami events in the Indian Ocean (2004), Chile (2010) and Japan (2011). Different coastal topographies affect tsunami propagation near shore. Varying wave characteristics lead to various failure mechanisms of bridge decks. Together with the wave characteristics, the bridge properties and the settings around the bridge play a major role in this failure, think for example of shear keys, seawalls or inclination of the bridge. To find out more about these failure mechanism and what role all these measures have in the failure, a laboratory experiment is executed and a numerical SPH model is set up to investigate the impacts of various wave characteristics, a seawall, shear key and inclination of the bridge deck. The numerical SPH model is validated with the help of wave gauge data and tracked bridge deck movement from the executed physical tests. In this thesis the focus is on the movement of the bridge deck, what kind of effect do the different interventions have on the movement of the deck. Since the movement is highly dependent on the forcing on the bridge deck, the forces are analyzed thoroughly. From the force time series countermeasures are proposed and modeled in the SPH model. Wave forces from different type of waves are simulated with the SPH model. The overall behavior of the hydrodynamics and the deck movement are validated and suited for qualitative analysis. Some disadvantages of the model are the lack of bottom friction and air bubbles in turbulent regions. The 3D model represented the movement on the deck in a very good way, runtimes and storage capacity formed an obstacle. A 2D model was used to do qualitative analysis of the changes of wave characteristics and the effects of the structural measures. The limiting factor in the commercial use of SPH is the computation time. In future models this could be accelerated by the use of GPU processors instead of CPU processors which are able to solve many parallel processes at the same time. Apart from wave heights and inundation heights, the wave phase appeared to be a major decisive factor in the failure method of the bridge deck. If the wave breaks near the shore and reaches the bridge structure as a propagating wave front, the hydrodynamic situation results in high horizontal forces and a sliding failure mode is apparent. When a wave is still in a surging phase and the fluid particles still have their rotational movement, the dominant forcing on the bridge is in vertical direction. Since the vertical force applied to the bridge deck moves from seaside to shore side, the sea side of the bridge deck has a higher vertical velocity which initiates… Advisors/Committee Members: Bricker, Jeremy (mentor), Antonini, Alessandro (graduation committee), Yang, Yuguang (graduation committee), Suzuki, Tomohiro (graduation committee), Kostense, N.W. (graduation committee), Delft University of Technology (degree granting institution).

Subjects/Keywords: Bridge; SPH; Smooth particle hydrodynamics; LS-DYNA; Laboratory experiment; CFD; Tsunami; wave; Flume experiments

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

APA (6^th Edition):

Salet, J. (. (2019). Tsunami induced failure of bridges: Determining failure modes with the use of SPH-modeling. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:56d1ccc2-b50a-44a6-9908-d5f495c6951c

Chicago Manual of Style (16^th Edition):

Salet, Jesse (author). “Tsunami induced failure of bridges: Determining failure modes with the use of SPH-modeling.” 2019. Masters Thesis, Delft University of Technology. Accessed January 27, 2021. http://resolver.tudelft.nl/uuid:56d1ccc2-b50a-44a6-9908-d5f495c6951c.

MLA Handbook (7^th Edition):

Salet, Jesse (author). “Tsunami induced failure of bridges: Determining failure modes with the use of SPH-modeling.” 2019. Web. 27 Jan 2021.

Vancouver:

Salet J(. Tsunami induced failure of bridges: Determining failure modes with the use of SPH-modeling. [Internet] [Masters thesis]. Delft University of Technology; 2019. [cited 2021 Jan 27]. Available from: http://resolver.tudelft.nl/uuid:56d1ccc2-b50a-44a6-9908-d5f495c6951c.

Council of Science Editors:

Salet J(. Tsunami induced failure of bridges: Determining failure modes with the use of SPH-modeling. [Masters Thesis]. Delft University of Technology; 2019. Available from: http://resolver.tudelft.nl/uuid:56d1ccc2-b50a-44a6-9908-d5f495c6951c

Queensland University of Technology

6. Gover, Rory Benjamin. Experimental impact and finite element analysis of a composite, portable road safety barrier.

Degree: 2013, Queensland University of Technology

URL: https://eprints.qut.edu.au/62339/

► This thesis provides an experimental and computational platform for investigating the performance and behaviour of water filled, plastic portable road safety barriers in an isolated… (more)

Subjects/Keywords: Road safety barriers; impact; polymeric foams; LDPE; impact testing; finite element analysis; smooth particle hydrodynamics; XPS; water ballast

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APA (6^th Edition):

Gover, R. B. (2013). Experimental impact and finite element analysis of a composite, portable road safety barrier. (Thesis). Queensland University of Technology. Retrieved from https://eprints.qut.edu.au/62339/

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):

Gover, Rory Benjamin. “Experimental impact and finite element analysis of a composite, portable road safety barrier.” 2013. Thesis, Queensland University of Technology. Accessed January 27, 2021. https://eprints.qut.edu.au/62339/.

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

MLA Handbook (7^th Edition):

Gover, Rory Benjamin. “Experimental impact and finite element analysis of a composite, portable road safety barrier.” 2013. Web. 27 Jan 2021.

Vancouver:

Gover RB. Experimental impact and finite element analysis of a composite, portable road safety barrier. [Internet] [Thesis]. Queensland University of Technology; 2013. [cited 2021 Jan 27]. Available from: https://eprints.qut.edu.au/62339/.

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

Council of Science Editors:

Gover RB. Experimental impact and finite element analysis of a composite, portable road safety barrier. [Thesis]. Queensland University of Technology; 2013. Available from: https://eprints.qut.edu.au/62339/

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

University of Manitoba

7. Polyzois, Ioannis. Prediction of the formation of adiabatic shear bands in high strength low alloy 4340 steel through analysis of grains and grain deformation.

Degree: Mechanical Engineering, 2014, University of Manitoba

URL: http://hdl.handle.net/1993/30072

► High strain rate plastic deformation of metals results in the formation of localized zones of severe shear strain known as adiabatic shear bands (ASBs), which… (more)

▼ High strain rate plastic deformation of metals results in the formation of localized zones of severe shear strain known as adiabatic shear bands (ASBs), which are a precursor to shear failure. The formation of ASBs in a high-strength low alloy steel, namely AISI 4340, was examined based on prior heat treatments (using different austenization and tempering temperatures), testing temperatures, and impact strain rates in order to map out grain size and grain deformation behaviour during the formation of ASBs. In the current experimental investigation, ASB formation was shown to be a microstructural phenomenon which depends on microstructural properties such as grain size, shape, orientation, and distribution of phases and hard particles—all controlled by the heat treatment process. Each grain is unique and its material properties are heterogeneous (based on its size, shape, and the complexity of the microstructure within the grain). Using measurements of grain size at various heat treatments as well as dynamic stress-strain data, a finite element model was developed using Matlab and explicit dynamic software LSDYNA to simulate the microstructural deformation of grains during the formation of ASBs. The model simulates the geometrical grain microstructure of steel in 2D using the Voronoi Tessellation algorithm and takes into account grain size, shape, orientation, and microstructural material property inhomogeneity between the grains and grain boundaries. The model takes advantage of the Smooth Particle Hydrodynamics (SPH) meshless method to simulate highly localized deformation as well as the Johnson-Cook Plasticity material model for defining the behavior of the steel at various heat treatments under high strain rate deformation.The Grain Model provides a superior representation of the kinematics of ASB formation on the microstructural level, based on grain size, shape and orientation. It is able to simulate the microstructural mechanism of ASB formation and grain refinement in AISI 4340 steel, more accurately and realistically than traditional macroscopic models, for a wide range of heat treatment and testing conditions. Advisors/Committee Members: Bassim, Nabil (Mechanical Engineering) (supervisor), Luo, Yunhua (Mechanical Engineering) Telichev, Igor (Mechanical Engineering) Shalaby, Ahmed (Civil Engineering) Wang, Zhirui (Materials Science and Technology, University of Toronto) (examiningcommittee).

Subjects/Keywords: adiabatic shear band; grain refinement; microstructure; simulations; high strength low alloy steel; heat treatment; grain size; meshless; Smooth Particle Hydrodynamics

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

APA (6^th Edition):

Polyzois, I. (2014). Prediction of the formation of adiabatic shear bands in high strength low alloy 4340 steel through analysis of grains and grain deformation. (Thesis). University of Manitoba. Retrieved from http://hdl.handle.net/1993/30072

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):

Polyzois, Ioannis. “Prediction of the formation of adiabatic shear bands in high strength low alloy 4340 steel through analysis of grains and grain deformation.” 2014. Thesis, University of Manitoba. Accessed January 27, 2021. http://hdl.handle.net/1993/30072.

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

MLA Handbook (7^th Edition):

Polyzois, Ioannis. “Prediction of the formation of adiabatic shear bands in high strength low alloy 4340 steel through analysis of grains and grain deformation.” 2014. Web. 27 Jan 2021.

Vancouver:

Polyzois I. Prediction of the formation of adiabatic shear bands in high strength low alloy 4340 steel through analysis of grains and grain deformation. [Internet] [Thesis]. University of Manitoba; 2014. [cited 2021 Jan 27]. Available from: http://hdl.handle.net/1993/30072.

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

Council of Science Editors:

Polyzois I. Prediction of the formation of adiabatic shear bands in high strength low alloy 4340 steel through analysis of grains and grain deformation. [Thesis]. University of Manitoba; 2014. Available from: http://hdl.handle.net/1993/30072

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

8. Sticko, Simon. Smooth Particle Hydrodynamics Applied to Fracture Mechanics.

Degree: Applied Mechanics, 2013, Uppsala University

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-202881

► A numerical method commonly referred to as smooth particle hydrodynamics (SPH) is implemented in two dimensions for solid mechanics in general and fracture mechanics… (more)

Subjects/Keywords: SPH; Smooth Particle Hydrodynamics; Applied Mechanics; Fracture

…Particle i Surrounding particles W ( x¯ − x¯i ) y −yi h x −xi h Figure 2.2… …x28;2.11) Of particle i where Einstein summation convention is applied over the greek… …ij Since one can interpret the “force contribution”, Fα , on particle i from particle j as… …particle distance we define: h h˜ = 1 (∆x + ∆y ) 2 where ∆x and ∆y are the initial… …particle spacings in the x - and y -direction. This quantity will be called the relative…

4 more images…

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APA (6^th Edition):

Sticko, S. (2013). Smooth Particle Hydrodynamics Applied to Fracture Mechanics. (Thesis). Uppsala University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-202881

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):

Sticko, Simon. “Smooth Particle Hydrodynamics Applied to Fracture Mechanics.” 2013. Thesis, Uppsala University. Accessed January 27, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-202881.

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

MLA Handbook (7^th Edition):

Sticko, Simon. “Smooth Particle Hydrodynamics Applied to Fracture Mechanics.” 2013. Web. 27 Jan 2021.

Vancouver:

Sticko S. Smooth Particle Hydrodynamics Applied to Fracture Mechanics. [Internet] [Thesis]. Uppsala University; 2013. [cited 2021 Jan 27]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-202881.

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

Council of Science Editors:

Sticko S. Smooth Particle Hydrodynamics Applied to Fracture Mechanics. [Thesis]. Uppsala University; 2013. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-202881

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

University of Cincinnati

9. Boregowda, Parikshit. Techniques to Improve Application of Smooth Particle Hydrodynamics in Incompressible Flows.

Degree: MS, Engineering and Applied Science: Mechanical Engineering, 2019, University of Cincinnati

URL: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1563527410355176

► In this investigation, incompressible flow is analyzed using Smooth Particle Hydrodynamics (SPH). SPH is meshfree and offers various advantages over mesh-based methods. SPH has been… (more)

▼ In this investigation, incompressible flow is analyzed using Smooth Particle Hydrodynamics (SPH). SPH is meshfree and offers various advantages over mesh-based methods. SPH has been applied to a mixed boundary problem- a pipe break problem involving flow boundary and a free surface. This combination of boundaries has not been previously analyzed in the literature. The pipe break problem is analyzed as a 2-D problem, and for simplicity is modeled as two infinitely long plates with a hole on one side. The problem is first simulated using a Weakly Compressible SPH (WCSPH) model since WCSPH is easy to implement and has been effectively applied to incompressible flows previously. However, the conventional WCSPH method failed to model the 2D pipe break problem successfully due to its poor ability to handle pressure variations. An Incompressible SPH (ISPH) based on the projection scheme, considering the flow as completely incompressible, is then used for the analysis of the pipe break problem. This projection scheme demands a numerical Neumann boundary condition on pressure, which leads to errors in all numerical methods. One way to solve this issue is to model the ISPH boundary to handle non-homogeneous pressure. Current ISPH boundaries, especially corners, are modelled to handle homogeneous pressure. Hence, a new corner boundary particle modeling technique is introduced here which can handle non-homogeneous pressure. The boundary modeling technique used is that of edge and dummy particles, which is computationally cheap. Pressure fluctuation in confined flow is studied in detail, and do’s and dont’s while modeling for pressure results are highlighted. ISPH is then extended to a dam collapse problem, which is a free surface problem. Tensile instability is solved by using the popular particle shifting scheme of ISPH. The particle shifting scheme is modified and applied to the free surface, without having to draw normal and tangents. This makes modeling not only computationally cheap but slightly more reliable since obtaining normal and tangents accurately in SPH is still being investigated by researchers. Finally, flow boundary particles are proposed, which is applied to both WCSPH and ISPH. Flow particles are modeled as edge particles that move, with a similar relation to dummy particles as that of edge particles. Flow particles are also modelled to handle non-zero Neumann Pressure boundary by making use of ghost particles inside the flow regime related to the flow particles. Both homogeneous and non-homogeneous pressure boundaries at the flow inlet and exit have been analyzed in a plane Poiseuille flow problem. After successfully validating ISPH to various boundary conditions, namely confined flow, free surface flow, and inflow-outflow, the numerical technique is then extended to 2D pipe break problem. Advisors/Committee Members: Liu, Gui-Rong (Committee Chair).

Subjects/Keywords: Mechanical Engineering; Incompressible Smooth Particle Hydrodynamics; Pipe break; Flow boundary conditions in SPH; Free surface particle shifting; corner particle modelling in SPH; Mixed boundary in SPH

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

APA (6^th Edition):

Boregowda, P. (2019). Techniques to Improve Application of Smooth Particle Hydrodynamics in Incompressible Flows. (Masters Thesis). University of Cincinnati. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=ucin1563527410355176

Chicago Manual of Style (16^th Edition):

Boregowda, Parikshit. “Techniques to Improve Application of Smooth Particle Hydrodynamics in Incompressible Flows.” 2019. Masters Thesis, University of Cincinnati. Accessed January 27, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1563527410355176.

MLA Handbook (7^th Edition):

Boregowda, Parikshit. “Techniques to Improve Application of Smooth Particle Hydrodynamics in Incompressible Flows.” 2019. Web. 27 Jan 2021.

Vancouver:

Boregowda P. Techniques to Improve Application of Smooth Particle Hydrodynamics in Incompressible Flows. [Internet] [Masters thesis]. University of Cincinnati; 2019. [cited 2021 Jan 27]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1563527410355176.

Council of Science Editors:

Boregowda P. Techniques to Improve Application of Smooth Particle Hydrodynamics in Incompressible Flows. [Masters Thesis]. University of Cincinnati; 2019. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1563527410355176

RMIT University

10. Charles, A. Smoothed particle modelling of liquid-vapour phase transitions.

Degree: 2014, RMIT University

URL: http://researchbank.rmit.edu.au/view/rmit:160833

► Liquid-vapour phase transition in a simple fluid is studied using Smoothed Particle Hydrodynamics (SPH), a Lagrangian numerical method. A continuum fluid model displaying a liquid-vapour… (more)

▼ Liquid-vapour phase transition in a simple fluid is studied using Smoothed Particle Hydrodynamics (SPH), a Lagrangian numerical method. A continuum fluid model displaying a liquid-vapour phase transition, based on the van der Waals equation of state with a squared density gradient capillary force and linear constitutive relations for viscosity and heat flux, is solved using SPH. The liquid vapour interface is intrinsically diffuse in both the analytical model and the numerical method. In SPH a continuous field is represented by interpolation over particles whose properties are smoothed over space and which interact with an environment dependent two-body potential. By applying SPH to the partial differential equations of continuum mechanics, a set of ordinary differential equations governing an N-body system of particles is obtained. A two dimensional SPH code was developed and used to simulate phase transitions. Temperature quenches were used to produce an instability driven decomposition into coexisting liquid and vapour. Stable coexisting vapour and liquid phases, with densities in good agreement with theory, are produced. Condensation emerges from the solution of the model with no explicit tracking of the vapour-liquid interface. Simulated fluids phase separate with a flow that appears realistic and without gross artifacts, containing droplets and bubbles which coalesce when driven together by flow. The kinetics of the growth of liquid domains in the phase separating fluid are divided into two regimes: an initial period in which density perturbations grow with an exponent close to one third, followed by a coarsening of liquid droplets where the exponent is strongly influenced by the quench depth. A three dimensional SPH code was developed in order to investigate the behaviour of the model when parameterised for water and used to simulate mesoscopic systems with length scales of the order of nanometres. When stable liquid vapour interfaces were formed for the continuum model of water, the density gradient and associated surface tension are resolved, however the surface tensions were found to be orders of magnitude too small. At coarse spatial resolution the interface is artificially broadened, leading to spuriously low surface tension. It is found that the spatial resolution must be of the order of the liquid-vapour interfacial width in order to accurately resolve density gradients and surface energy. Ultimately, liquid-vapour phase transitions can be modelled using SPH, however the microscopic width of the interface requires either microscopic simulation resolution or parameterisation to account for unresolved spatial scales.

Subjects/Keywords: Fields of Research; phase transition dynamics; numerical modelling; condensation; smoothed particle hydrodynamics; smooth particle applied mechanics; liquid-vapour coexistence; phase transition kinetics

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APA (6^th Edition):

Charles, A. (2014). Smoothed particle modelling of liquid-vapour phase transitions. (Thesis). RMIT University. Retrieved from http://researchbank.rmit.edu.au/view/rmit:160833

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):

Charles, A. “Smoothed particle modelling of liquid-vapour phase transitions.” 2014. Thesis, RMIT University. Accessed January 27, 2021. http://researchbank.rmit.edu.au/view/rmit:160833.

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

MLA Handbook (7^th Edition):

Charles, A. “Smoothed particle modelling of liquid-vapour phase transitions.” 2014. Web. 27 Jan 2021.

Vancouver:

Charles A. Smoothed particle modelling of liquid-vapour phase transitions. [Internet] [Thesis]. RMIT University; 2014. [cited 2021 Jan 27]. Available from: http://researchbank.rmit.edu.au/view/rmit:160833.

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

Council of Science Editors:

Charles A. Smoothed particle modelling of liquid-vapour phase transitions. [Thesis]. RMIT University; 2014. Available from: http://researchbank.rmit.edu.au/view/rmit:160833

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

Indian Institute of Science

11. Rahaman, Md Masiur. Dynamic Flow Rules in Continuum Visco-plasticity and Damage Models for Poly-crystalline Solids.

Degree: PhD, Faculty of Science, 2019, Indian Institute of Science

URL: http://etd.iisc.ac.in/handle/2005/4240

► Modelling highly non-linear, strongly temperature- and rate-dependent visco-plastic behaviour of poly-crystalline solids (e.g., metals and metallic alloys) is one of the most challenging topics of… (more)

▼ Modelling highly non-linear, strongly temperature- and rate-dependent visco-plastic behaviour of poly-crystalline solids (e.g., metals and metallic alloys) is one of the most challenging topics of contemporary research interest, mainly owing to the increasing use of metallic structures in engineering applications. Numerous classical models have been developed to model the visco-plastic behaviour of poly-crystalline solids. However, limitations of classical visco-plasticity models have been realized mainly in two cases: in problems at the scale of mesoscopic length (typically in the range of a tenth of a micron to a few tens of micron) or lower, and in impact problems under high-strain loading with varying temperature. As a remedy of the first case, several length scale dependent non-local visco-plasticity models have been developed in the last few decades. Unfortunately, a rationally grounded continuum model with the capability of reproducing visco-plastic response in accord with the experimental observations under high strain-rates and varying temperatures remains elusive and attempts in this direction are often mired in controversies. With the understanding of metal visco-plasticity as a macroscopic manifestation of the underlying dislocation motion, there are attempts to develop phenomenological as well as physics-based continuum models that could be applied across different regimes of temperature and strain rate. Yet, none of these continuum visco-plasticity models accurately capture the experimentally observed oscillations in the stress-strain response of metals (e.g. molybdenum, tantalum etc.) under high strain rates and such phenomena are sometimes even dismissed as mere experimental artefacts. The question arises as to whether the existing models have consistently overlooked any important mechanism related to dislocation motion which could be very important at high strain-rate loading and possibly responsible for oscillations in the stress-strain response. In the search for an answer to this question, one observes that the existing macro-scale continuum visco-plasticity models do not account for the effects of dislocation inertia which is identified in this thesis as a dominating factor in the visco-plastic response under high strain rates. Incorporating the effect of dislocation inertia in the continuum response, a visco-plasticity model is developed. Here the ow rule is derived based on an additional balance law, the micro-force balance, for the forces arising from (and maintaining) the plastic flow. The micro-force balance together with the classical momentum balance equations thus describes the visco-plastic response of isotropic poly-crystalline materials. The model is thermodynamically consistent as the constitutive relations for the fluxes are determined on satisfying the laws of thermodynamics. The model includes consistent derivation of temperature evolution, thus replaces the empirical route. Partial differential equations (PDEs) describing the visco-plastic behaviour in the present model is… Advisors/Committee Members: Roy, Debasish (advisor).

Subjects/Keywords: Visco-plasticity Model; Visco-plastic Damage Model; Polycrystalline Solids; Thermo-viscoplastic Damage Model; Micro-inertia Driven Flow Rule; Peridynamics Model; Smooth Particle Hydrodynamics (SPH); Dynamic Flow Rule; Mathematics

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

APA (6^th Edition):

Rahaman, M. M. (2019). Dynamic Flow Rules in Continuum Visco-plasticity and Damage Models for Poly-crystalline Solids. (Doctoral Dissertation). Indian Institute of Science. Retrieved from http://etd.iisc.ac.in/handle/2005/4240

Chicago Manual of Style (16^th Edition):

Rahaman, Md Masiur. “Dynamic Flow Rules in Continuum Visco-plasticity and Damage Models for Poly-crystalline Solids.” 2019. Doctoral Dissertation, Indian Institute of Science. Accessed January 27, 2021. http://etd.iisc.ac.in/handle/2005/4240.

MLA Handbook (7^th Edition):

Rahaman, Md Masiur. “Dynamic Flow Rules in Continuum Visco-plasticity and Damage Models for Poly-crystalline Solids.” 2019. Web. 27 Jan 2021.

Vancouver:

Rahaman MM. Dynamic Flow Rules in Continuum Visco-plasticity and Damage Models for Poly-crystalline Solids. [Internet] [Doctoral dissertation]. Indian Institute of Science; 2019. [cited 2021 Jan 27]. Available from: http://etd.iisc.ac.in/handle/2005/4240.

Council of Science Editors:

Rahaman MM. Dynamic Flow Rules in Continuum Visco-plasticity and Damage Models for Poly-crystalline Solids. [Doctoral Dissertation]. Indian Institute of Science; 2019. Available from: http://etd.iisc.ac.in/handle/2005/4240

12. Βορτσέλας, Αχιλλεύς. Μοντελοποίηση της φθοράς των μεταλλικών και κεραμικών επιφανειών με τη συνδυασμένη χρήση αριθμητικών προσομοιώσεων και στοχαστικών μοντέλων σε μικροκλίμακα και μακροκλίμακα.

Degree: 2011, National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ)

URL: http://hdl.handle.net/10442/hedi/27391

► The ultimate goal of wear modelling is the relatively accurate prediction of the wear rate, over a wide range of operational conditions, without the need… (more)

▼ The ultimate goal of wear modelling is the relatively accurate prediction of the wear rate, over a wide range of operational conditions, without the need to recur to wear testing. The current state of the art in tribological modelling may be considered to be still quite far away from this goal, for three main reasons: • The complexity and non-linearity and the cooperative phenomena found in wear mechanisms, related to relatively weak analytical solutions. • The stochastic nature of surface morphology and material properties which inhibit a deterministic approach. • The multiscale nature of wear, since it is essentially a macroscopic manifestation of cooperative micro-, and nanoscale phenomena. The present work presents a combination of novel modelling techniques, focused in addressing the above challenges. A dual-scale model is formulated, with single asperity interactions at the microscale and interaction of surfaces with stochastic morphology at the macroscale. In this multiscale model of sliding wear, the interface is modelled at the macroscale level by a Monte Carlo simulation, which is an excellent method for the easy integration of stochastic functions in multidimensional spaces. The simulation is based on data about the forces, wear volume and topography evolution of the surface for each contact zone, derived from an asperity interaction model in the microscale. Analytical wear models are the basis for the original application of the multiscale approach, so initially an extensive review of them was conducted. The modeling methodologies have been examined, for analytical as well as numerical or multiscale models. The Monte Carlo method has been applied on such models for abrasive, adhesive, fatigue and erosive wear and subsequently integrated into the macroscale model. Meshfree numerical methods, where the flow of nodal masses is not confined by a grid, are considered more suitable than the Finite Element Method to address the complications which arise in a tribosystem. These are large, non-linear deformations, causing severe instability to mesh-based methods, as well as extensive formation of new surfaces, due to crack propagation, fragmentation and wear debris separation. The suitability of various numerical methods in addressing such problems was extensively reviewed. The microscale model is based on a parametric numerical simulation, employing the Smooth Particle Hydrodynamics (SPH) method. The issues arising for the implementation of the SPH method in solving problems of elastic-plastic solids at the microscale (numerical efficiency, tensile instability, mass scaling) have been examined theoretically and solutions have been incorporated in the implementation of the method. Various microscale models have been constructed, in two and three dimensions, along with the respective pre- and post-processing algorithms, in order to be incorporated into a fully automated solution cycle of the multiscale model. The data exchange between the two scales of the model is conducted via interpolation on a map of microscale…

Subjects/Keywords: Τριβολογία; Φθορά; Πολυκλίμακη μοντελοποίηση; Υπολογιστική μηχανική; Στοχαστική προσομοίωση; Μεταλλικά υλικά; Κεραμικά υλικά; Υδροδυναμική ρεόντων σωματιδίων; Tribology; Wear; Multiscale modelling; Computational mechanics; Stochastic simulation; Metallic materials; Ceramic materials; Smooth particle hydrodynamics

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

APA (6^th Edition):

Βορτσέλας, . �. (2011). Μοντελοποίηση της φθοράς των μεταλλικών και κεραμικών επιφανειών με τη συνδυασμένη χρήση αριθμητικών προσομοιώσεων και στοχαστικών μοντέλων σε μικροκλίμακα και μακροκλίμακα. (Thesis). National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ). Retrieved from http://hdl.handle.net/10442/hedi/27391

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):

Βορτσέλας, Αχιλλεύς. “Μοντελοποίηση της φθοράς των μεταλλικών και κεραμικών επιφανειών με τη συνδυασμένη χρήση αριθμητικών προσομοιώσεων και στοχαστικών μοντέλων σε μικροκλίμακα και μακροκλίμακα.” 2011. Thesis, National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ). Accessed January 27, 2021. http://hdl.handle.net/10442/hedi/27391.

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

MLA Handbook (7^th Edition):

Βορτσέλας, Αχιλλεύς. “Μοντελοποίηση της φθοράς των μεταλλικών και κεραμικών επιφανειών με τη συνδυασμένη χρήση αριθμητικών προσομοιώσεων και στοχαστικών μοντέλων σε μικροκλίμακα και μακροκλίμακα.” 2011. Web. 27 Jan 2021.

Vancouver:

Βορτσέλας �. Μοντελοποίηση της φθοράς των μεταλλικών και κεραμικών επιφανειών με τη συνδυασμένη χρήση αριθμητικών προσομοιώσεων και στοχαστικών μοντέλων σε μικροκλίμακα και μακροκλίμακα. [Internet] [Thesis]. National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ); 2011. [cited 2021 Jan 27]. Available from: http://hdl.handle.net/10442/hedi/27391.

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

Council of Science Editors:

Βορτσέλας �. Μοντελοποίηση της φθοράς των μεταλλικών και κεραμικών επιφανειών με τη συνδυασμένη χρήση αριθμητικών προσομοιώσεων και στοχαστικών μοντέλων σε μικροκλίμακα και μακροκλίμακα. [Thesis]. National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ); 2011. Available from: http://hdl.handle.net/10442/hedi/27391

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

13. MD. JAHIDUL ISLAM. Response and failure mechanisms of structural member under high velocity impact.

Degree: 2011, National University of Singapore

URL: http://scholarbank.nus.edu.sg/handle/10635/31651

Subjects/Keywords: Finite element method (FEM); smooth particle hydrodynamics (SPH); high velocity impact; strain rate effect; adiabatic heating; material modeling

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

APA (6^th Edition):

ISLAM, M. J. (2011). Response and failure mechanisms of structural member under high velocity impact. (Thesis). National University of Singapore. Retrieved from http://scholarbank.nus.edu.sg/handle/10635/31651

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):

ISLAM, MD. JAHIDUL. “Response and failure mechanisms of structural member under high velocity impact.” 2011. Thesis, National University of Singapore. Accessed January 27, 2021. http://scholarbank.nus.edu.sg/handle/10635/31651.

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

MLA Handbook (7^th Edition):

ISLAM, MD. JAHIDUL. “Response and failure mechanisms of structural member under high velocity impact.” 2011. Web. 27 Jan 2021.

Vancouver:

ISLAM MJ. Response and failure mechanisms of structural member under high velocity impact. [Internet] [Thesis]. National University of Singapore; 2011. [cited 2021 Jan 27]. Available from: http://scholarbank.nus.edu.sg/handle/10635/31651.

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

Council of Science Editors:

ISLAM MJ. Response and failure mechanisms of structural member under high velocity impact. [Thesis]. National University of Singapore; 2011. Available from: http://scholarbank.nus.edu.sg/handle/10635/31651

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

Penn State University

14. Lescoe, Ryan. Improvement of Soil Modeling in a Tire-Soil Interaction Using Finite Element Analysis and Smooth Particle Hydrodynamics .

Degree: 2010, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/10823

► In recent years, the advancement of computerized modeling has allowed for the creation of extensive pneumatic tire models. These models have been used to determine… (more)

▼ In recent years, the advancement of computerized modeling has allowed for the creation of extensive pneumatic tire models. These models have been used to determine many tire properties and tire-road interaction parameters which are either prohibitively expensive or unavailable with physical models. More recently, computerized modeling has been used to explore tire-soil interactions. The new parameters created by these interactions were defined for these models, but accurate soil constitutive equations were lacking. With the previous models, the soil was simulated using Finite Element Analysis (FEA) with soil material models requiring calibration and validation. Furthermore, the meshless modeling method of Smooth Particle Hydrodynamics (SPH) may be a viable approach to more accurately simulating large soil deformations and complex tire-soil interactions. For this thesis, a rigid tire model is used to perform an extensive sensitivity study on the previously used FEA soft soil (dense sand) in order to determine the importance of mesh size, soil plot size, and edge constraints. Then, parameters for SPH particles are determined for either complete or partial replacement of FEA elements in the soil model. Rolling resistance tests are conducted with a rigid tire model for different SPH and FEA/SPH soil models and compared to the previously determined best FEA soil model. Replacement of FEA elements with SPH particles is found to be the key variable as using a deeper amount of SPH particles increases rolling resistance while increasing the SPH particle density has little effect on rolling resistance. These results are then replicated using a pneumatic tire model. For further validation, pressure-sinkage tests are conducted with the FEA and SPH soils to explore the differences in the two soil modeling methods. Also, shear-displacement tests are conducted with the SPH soil—a test which cannot easily be performed with an FEA soil model. These shear tests show that the SPH soil behaves more like a clay in initial shearing and more like a sand by exhibiting increased shearing due to vertical loading. Furthermore, both the pressure-sinkage and shear-displacement tests still indicate that a larger particle density is unnecessary. Advisors/Committee Members: Moustafa El Gindy, Thesis Advisor/Co-Advisor, Moustafa El Gindy, Thesis Advisor/Co-Advisor, Kevin L Koudela, Thesis Advisor/Co-Advisor.

Subjects/Keywords: smoothed; smooth particle hydrodynamics; FEA; finite element analysis; tire-soil interaction; soil modeling; SPH; PAM-Crash; PAM-Shock; pneumatic tire; rigid tire

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

APA (6^th Edition):

Lescoe, R. (2010). Improvement of Soil Modeling in a Tire-Soil Interaction Using Finite Element Analysis and Smooth Particle Hydrodynamics . (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/10823

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):

Lescoe, Ryan. “Improvement of Soil Modeling in a Tire-Soil Interaction Using Finite Element Analysis and Smooth Particle Hydrodynamics .” 2010. Thesis, Penn State University. Accessed January 27, 2021. https://submit-etda.libraries.psu.edu/catalog/10823.

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

MLA Handbook (7^th Edition):

Lescoe, Ryan. “Improvement of Soil Modeling in a Tire-Soil Interaction Using Finite Element Analysis and Smooth Particle Hydrodynamics .” 2010. Web. 27 Jan 2021.

Vancouver:

Lescoe R. Improvement of Soil Modeling in a Tire-Soil Interaction Using Finite Element Analysis and Smooth Particle Hydrodynamics . [Internet] [Thesis]. Penn State University; 2010. [cited 2021 Jan 27]. Available from: https://submit-etda.libraries.psu.edu/catalog/10823.

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

Council of Science Editors:

Lescoe R. Improvement of Soil Modeling in a Tire-Soil Interaction Using Finite Element Analysis and Smooth Particle Hydrodynamics . [Thesis]. Penn State University; 2010. Available from: https://submit-etda.libraries.psu.edu/catalog/10823

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

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Open Access Theses and Dissertations