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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 SendovaWalton fracture model, which weakens or eliminates the standard cracktip 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 higherorder 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 modeI and modeIII 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 