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You searched for +publisher:"Mississippi State University" +contributor:("Steve Daniewicz"). Showing records 1 – 3 of 3 total matches.

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Mississippi State University

1. Crapps, Justin Mandel. DEVELOPMENT OF A MACROSTRUCTURAL MODEL FOR STUDYING THE COMBINED EFFECTS OF PLASTICITY AND ROUGHNESS INDUCED CRACK CLOSURE.

Degree: PhD, Mechanical Engineering, 2010, Mississippi State University

A weight function based modified strip-yield model is adapted to include the mode I effects of roughness induced crack closure. The weight function methodology is verified for arbitrary mixed mode loading conditions under load levels experienced in fatigue crack growth. A rough crack geometry is simulated as a sine wave fitted to a sawtooth defined by an asperity angle and period. Additional mode I crack closure due to mode II sliding of crack faces is calculated and incorporated into the strip-yield model by lengthening and shortening the crack face elements. Simulations of fatigue crack growth using the newly developed model are examined via a design and analysis of computer experiments. The effects of model parameters are identified. Combined roughness and plasticity induced crack closure for long cracks is studied. Advisors/Committee Members: Rogelio Luck (committee member), Oliver Myers (committee member), Jim Newman Jr (committee member), Steve Daniewicz (chair).

Subjects/Keywords: Weight Function; Dugdale Model; Strip Yield Model; Fracture Mechanics; Crack Growth; Crack; Fatigue

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APA (6th Edition):

Crapps, J. M. (2010). DEVELOPMENT OF A MACROSTRUCTURAL MODEL FOR STUDYING THE COMBINED EFFECTS OF PLASTICITY AND ROUGHNESS INDUCED CRACK CLOSURE. (Doctoral Dissertation). Mississippi State University. Retrieved from http://sun.library.msstate.edu/ETD-db/theses/available/etd-11012010-144328/ ;

Chicago Manual of Style (16th Edition):

Crapps, Justin Mandel. “DEVELOPMENT OF A MACROSTRUCTURAL MODEL FOR STUDYING THE COMBINED EFFECTS OF PLASTICITY AND ROUGHNESS INDUCED CRACK CLOSURE.” 2010. Doctoral Dissertation, Mississippi State University. Accessed July 16, 2019. http://sun.library.msstate.edu/ETD-db/theses/available/etd-11012010-144328/ ;.

MLA Handbook (7th Edition):

Crapps, Justin Mandel. “DEVELOPMENT OF A MACROSTRUCTURAL MODEL FOR STUDYING THE COMBINED EFFECTS OF PLASTICITY AND ROUGHNESS INDUCED CRACK CLOSURE.” 2010. Web. 16 Jul 2019.

Vancouver:

Crapps JM. DEVELOPMENT OF A MACROSTRUCTURAL MODEL FOR STUDYING THE COMBINED EFFECTS OF PLASTICITY AND ROUGHNESS INDUCED CRACK CLOSURE. [Internet] [Doctoral dissertation]. Mississippi State University; 2010. [cited 2019 Jul 16]. Available from: http://sun.library.msstate.edu/ETD-db/theses/available/etd-11012010-144328/ ;.

Council of Science Editors:

Crapps JM. DEVELOPMENT OF A MACROSTRUCTURAL MODEL FOR STUDYING THE COMBINED EFFECTS OF PLASTICITY AND ROUGHNESS INDUCED CRACK CLOSURE. [Doctoral Dissertation]. Mississippi State University; 2010. Available from: http://sun.library.msstate.edu/ETD-db/theses/available/etd-11012010-144328/ ;


Mississippi State University

2. McKnight, Dustin Henry. The use of compression precracking constant amplitude (CPCA) test method to obtain near-threshold fatigue crack growth behavior in AA7075-T7351.

Degree: MS, Mechanical Engineering, 2005, Mississippi State University

Traditionally, pre-cracking has been performed under tension-tension loading, followed by a load reduction scheme to obtain fatigue crack growth rate data in the near threshold regime. These data have been shown to exhibit load history effects due to remote crack closure. An alternative test method has been developed to minimize these load history effects. This test procedure uses compression pre-cracking to initiate a crack, followed by constant amplitude loading to grow the crack to failure. Compression-compression (C-C) loading as a means of forming a starter crack for fatigue crack growth is a relatively new concept. Cracks grown under C-C loading emanate from the notch tip due to a tensile residual stress field formed during the unloading cycle. The subsequent constant amplitude steady-state crack growth is free of load history effects, after crack growth beyond several compressive plastic zone sizes, and therefore will give a better steady-state representation of the near-threshold regime. A more in-depth examination at this phenomenon is performed herein. Advisors/Committee Members: Judy Schneider (chair), James Newman Jr. (committee member), Steve Daniewicz (committee member), Peter McKeighan (committee member), Donald Smith (committee member).

Subjects/Keywords: effective stress intensity factor; closure

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APA (6th Edition):

McKnight, D. H. (2005). The use of compression precracking constant amplitude (CPCA) test method to obtain near-threshold fatigue crack growth behavior in AA7075-T7351. (Masters Thesis). Mississippi State University. Retrieved from http://sun.library.msstate.edu/ETD-db/theses/available/etd-11102005-065337/ ;

Chicago Manual of Style (16th Edition):

McKnight, Dustin Henry. “The use of compression precracking constant amplitude (CPCA) test method to obtain near-threshold fatigue crack growth behavior in AA7075-T7351.” 2005. Masters Thesis, Mississippi State University. Accessed July 16, 2019. http://sun.library.msstate.edu/ETD-db/theses/available/etd-11102005-065337/ ;.

MLA Handbook (7th Edition):

McKnight, Dustin Henry. “The use of compression precracking constant amplitude (CPCA) test method to obtain near-threshold fatigue crack growth behavior in AA7075-T7351.” 2005. Web. 16 Jul 2019.

Vancouver:

McKnight DH. The use of compression precracking constant amplitude (CPCA) test method to obtain near-threshold fatigue crack growth behavior in AA7075-T7351. [Internet] [Masters thesis]. Mississippi State University; 2005. [cited 2019 Jul 16]. Available from: http://sun.library.msstate.edu/ETD-db/theses/available/etd-11102005-065337/ ;.

Council of Science Editors:

McKnight DH. The use of compression precracking constant amplitude (CPCA) test method to obtain near-threshold fatigue crack growth behavior in AA7075-T7351. [Masters Thesis]. Mississippi State University; 2005. Available from: http://sun.library.msstate.edu/ETD-db/theses/available/etd-11102005-065337/ ;


Mississippi State University

3. Jordon, James Brian. EXPERIMENTS AND MODELING OF FATIGUE AND FRACTURE OF ALUMINUM ALLOYS.

Degree: PhD, Mechanical Engineering, 2008, Mississippi State University

In this work, understanding the microstructural effects of monotonic and cyclic failure of wrought 7075-T651 and cast A356 aluminum alloys were examined. In particular, the structure-property relations were quantified for the plasticity/damage model and two fatigue crack models. Several types of experiments were employed to adapt an internal state variable plasticity and damage model to the wrought alloy. The damage model was originally developed for cast alloys and thus, the model was modified to account for void nucleation, growth, and coalescence for a wrought alloy. In addition, fatigue experiments were employed to determine structure-property relations for the cast alloy. Based on microstructural analysis of the fracture surfaces, modifications to the microstructurally-based MultiStage fatigue model were implemented. Additionally, experimental fatigue crack results were used to calibrate FASTRAN, a fatigue life prediction code, to small fatigue-crack-growth behavior. Lastly, a set of experiments were employed to explore the damage history effect associated with cast and wrought alloys and to provide motivation for monotonic and fatigue modeling efforts. Advisors/Committee Members: Haitham El Kadiri (committee member), John Berry (committee member), Steve Daniewicz (committee member), James Newman, Jr (committee member), Mark Horstemeyer (chair).

Subjects/Keywords: Damage; Fatigue; Small fatigue crack growth; Aluminum alloys; Anisotropic microstructure

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

APA (6th Edition):

Jordon, J. B. (2008). EXPERIMENTS AND MODELING OF FATIGUE AND FRACTURE OF ALUMINUM ALLOYS. (Doctoral Dissertation). Mississippi State University. Retrieved from http://sun.library.msstate.edu/ETD-db/theses/available/etd-11062008-110529/ ;

Chicago Manual of Style (16th Edition):

Jordon, James Brian. “EXPERIMENTS AND MODELING OF FATIGUE AND FRACTURE OF ALUMINUM ALLOYS.” 2008. Doctoral Dissertation, Mississippi State University. Accessed July 16, 2019. http://sun.library.msstate.edu/ETD-db/theses/available/etd-11062008-110529/ ;.

MLA Handbook (7th Edition):

Jordon, James Brian. “EXPERIMENTS AND MODELING OF FATIGUE AND FRACTURE OF ALUMINUM ALLOYS.” 2008. Web. 16 Jul 2019.

Vancouver:

Jordon JB. EXPERIMENTS AND MODELING OF FATIGUE AND FRACTURE OF ALUMINUM ALLOYS. [Internet] [Doctoral dissertation]. Mississippi State University; 2008. [cited 2019 Jul 16]. Available from: http://sun.library.msstate.edu/ETD-db/theses/available/etd-11062008-110529/ ;.

Council of Science Editors:

Jordon JB. EXPERIMENTS AND MODELING OF FATIGUE AND FRACTURE OF ALUMINUM ALLOYS. [Doctoral Dissertation]. Mississippi State University; 2008. Available from: http://sun.library.msstate.edu/ETD-db/theses/available/etd-11062008-110529/ ;

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