摘要
用Ｊ积分方法研究球墨铸铁和可锻铸铁的断裂韧性可以满足其有效性，并对它们的断裂韧性进行比较，试验结果表明它们的断裂韧性各有特点，在机件设计过程中充分考虑其断裂韧性是十分必要的．
The frature toughness of DCI and MCI'research is valid with the method of J-integral. Compare the fracture toughness of DCI with MCI's. Experiment results prove:Their the fractrue toughness have themselves characteristic. It is very necessary in machine desig ,Full thougt it's the fracture toughness.
基金
云南省教委青年教师科研基金
关键词
球墨铸铁
可锻铸铁
断裂韧性
断裂失效
ductile cast iron
malleable cast iron
fracture toughness
