Mississippi State University
Daniewicz, S. R.
Newman, J. C., Jr.
Horstemeyer, M. F.
Date of Degree
Graduate Thesis - Open Access
Master of Science
James Worth Bagley College of Engineering
Department of Mechanical Engineering
This thesis discusses plasticity-induced crack closure based finite element simulations of small fatigue cracks in three dimensions utilizing crystal plasticity theory. Previously, modeling has been performed in two dimensions using a double-slip crystal plasticity material model. The goal of this work is to extend that research using a full three-dimensional FCC crystal plasticity material model implementation that accounts for all twelve FCC slip systems. Discussions of Python scripts that were written to perform analyses with the commercial finite element code ABAQUS are given. A detailed description of the modeling methodology is presented along with results for single crystals and bicrystals. The results are compared with finite element and experimental results from the literature. A discussion of preliminary work for the analysis of crack growth around an intermetallic particle is also presented.
Johnston, Stephen R (Stephen Riley), "Finite Element Simulations of Three-Dimensional Microstructurally Small Fatigue Crack Growth in 7075 Aluminum Alloy Using Crystal Plasticity Theory" (2005). Theses and Dissertations. 2290.