Three-dimensional moving finite element analysis of Charpy impact test

Measurement of material resistance toward imposed impact loading are required for safety design and safety maintenance. The common method of evaluating impact resistant is Charpy impact test. This is an impact test for evaluating the energy required for breaking the specimen. Result of the Charpy impact test is derived from absorbed energy of the specimen. The absorbed energy consists of kinetic energy, strain energy, fracture energy. Therefore, we cannot treat Charpy impact value as dynamic fracture toughness. So we make 3D simulation based on the Charpy impact test to clarify correlation between material fracture resistance and the Charpy impact parameter. In the 3D moving finite element analyses, fracture resistance is estimated based on dynamic J integral.