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SIAM Chapter Seminar

Lauren A Ferguson
University of Dayton Research Institute
Title: Modeling Fracture by Incorporating Interfacial Mechanics

Abstract: Continuum surface methods use boundary mechanics to augment the classical linear elastic fracture mechanics model and provide improved prediction of material behavior near fracture surfaces. We will present our approach for the numerical implementation of one such method, the Sendova-Walton fracture model, which weakens or eliminates the standard crack-tip stress singularity and predicts a more realistic opening profile. A finite element solution for this model would be highly advantageous for design simulation, but is difficult to accomplish due to the higher-order tangential derivatives which appear in the fracture surface boundary conditions. We will discuss our strategy for reducing or removing these derivatives in the case of mode-I and mode-III fracture and show some implementation results which agree with the model's predictions. Finally, we will present our approach for the experimental validation of this model via nanoindentation.

Date: Thursday, November 13, 2014
Time: 5:30 pm
Location: Wean Hall 8220