Laminated Cr-NiAl micro-cantilever for fracture toughness measurement experiment (courtesy of Stefan Gabel) and finite element simulation.
Finite element method simulation of single crystalline cantilever bending for fracture toughness measurement
Micro-cantilever bending test is often applied to micro-scale samples for fracture toughness measurement. Due to the size of these samples, they are usually single crystalline materials in which the underlining deformation is always anisotropic. Yet isotropic theory is usually applied to evaluate the fracture toughness in experiments. In this project, we apply finite element method to assess the the deviation of the fracture toughness when isotropic theory is applied, i.e., trying to answer the question whether the fracture toughness is underestimated or overestimated by using isotropic theory.