Study on local deformation of void affecting mechanical property of nanomaterial

摘要

In this study, the FEM (finite elemental method) model that reproduces the void geometry and array was made from the image of the sintered nanomaterial by using SEM (scanning electron microscope). The nonlinear strain can be estimated by using the structural analysis. The strain of elements exceed a certain threshold value was transmuted from the metal to the void. Then, the structural analysis applies against this new model again. The crack initiation, the crack propagation path could be estimated, repeating these processes over and over again. In addition, the average mechanical properties that we have not been able to measure by the experiment of the entire model that has some cracks occurred by forced displacement repeatedly can be evaluated. Thanks to this analysis method, it becomes possible to estimate how the crack affects mechanical property of nanomaterial.