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A Critical Evaluation of Computational Fracture Using a Smeared Crack Approach in MPM

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Please use this identifier to cite or link to this item: http://hdl.handle.net/1928/12110

A Critical Evaluation of Computational Fracture Using a Smeared Crack Approach in MPM

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Title: A Critical Evaluation of Computational Fracture Using a Smeared Crack Approach in MPM
Author: Sanchez, Jason
Advisor(s): Khraishi, Tariq
Committee Member(s): Schreyer, Howard
Sulsky, Deborah
Yu-Lin, Shen
Department: University of New Mexico. Dept. of Mechanical Engineering
Subject(s): Computational Fracture
Material-point method
MPM
de-cohesion
smeared crack
Degree Level: Doctoral
Abstract: An evaluation of the smeared crack representation of material failure using the material-point method (MPM) as a feasible computational failure approach is performed. The spatial descretization in MPM is defined by a grid of cells that represent space and a set of points that represent the deformable solid. A grid orientation bias in the numerical results is demonstrated. Solution accuracy is lost when failure surface and grid line orientations are not aligned. Causes of the grid orientation dependence are identified, but the problem remains unresolved. Limited use of the smeared crack approach in MPM for solving problems of material failure is advised.
Graduation Date: December 2010
URI: http://hdl.handle.net/1928/12110

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