衝撃試験と数値解析を用いた破壊じん性評価法に関する研究

抄録

In the Charpy impact tests, the he absorbed energy of specimen are treated as material toughness. However, fracture mechanics approach are required for crack problems in materials. In this study, some experimental results are derived using two type specimens under various collision speeds. Numerical simulations for crack propagation in the Charpy specimen are operated based on the absorbed energy in these experiments. The dynamic J integral is calculated in numerical singular deformation field around crack tip. Similar numerical fracture toughness are indicated from the numerical simulations based on some experimental conditions.