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Thermodynamically Consistent Phase Field Modeling of Interaction Between Crack Propagation and Phase Transformation
, Ph.D. Dissertation Sharif University of Technology ; Farrahi, Gholam Hossein (Supervisor) ; Javanbakht, Mahdi (Co-Supervisor)
Abstract
According to the widespread application of shape memory alloys, their study in the presence of cracks has received lots of attention in the last two decades. The phase transformation ahead of the crack tip may change the stress field and the fracture behavior, especially at the nanoscale. Thus, modeling this phenomenon helps to recognize the affecting factors on crack propagation and prediction of material behavior when cracks exist. In the first step of this thesis, a phase field approach for crack propagation was presented, first by considering fracture as phase transformation and then as bond breaking. According to the scaling-up strategy, the developed theory is applicable from the...