A novel finite deformation FE model is developed in this paper for coupled electro-mechanical response with crack evolution heterogeneous piezoelectric composite microstructures. Fracture these composites driven by complex mechanical and electrical mechanisms leading to a set of strongly coupled, nonlinear governing equations. Crack propagation interfacial decohesion the presence fields are mod...

Bin Zhou, M. D. Thouless, and S. M. Ward Department of Mechanical Engineering Department of Material Science and Engineering University of Michigan Ann Arbor, MI, 48109 Scientific Research Laboratory Ford Motor Company Dearborn, MI, 48124 Abstract A methodology for determining the cohesive facture parameters associated with pull-out of spot welds is presented. Since failure of a spot weld by pu...

Intergranular fracture in polycrystals is often simulated by finite elements coupled to a cohesive zone model for the interfaces, requiring cohesive laws for grain boundaries as a function of their geometry. We discuss three challenges in understanding intergranular fracture in polycrystals. First, 3D grain boundary geometries comprise a five-dimensional space. Second, the energy and peak stres...

The fracture behaviour of human cortical bone was analysed considering a miniaturized version of the Double Cantilever Beam (DCB) test. A specific data reduction scheme based on crack equivalent concept was used to obtain the resistance curves. The definition of the cohesive laws mimicking the fracture process was performed measuring the crack tip opening displacement by digital image correlati...