摘要
根据Ｂｕｉ的脆性损伤理论，本文研究Ⅰ型拉伸裂纹的平面应变过程区及其力学场．计及裂尖材料的有限变形，细致的有限元分析结出了小范围屈服条件下两种典型的损伤区形貌．
An abrupt damage model,taking full account of finite geometry changes,is used to study both the shapes of damaSe zones and the stress strain fields for a plane-strain tensile crack under the small scale yielding condition. Two typical crack-tip damage profiles are simulated by means of element vanish technique. The corresponding fracture toughness increment due to damage dissipation is evaluated in terms of the energy release rate.
出处
《固体力学学报》
CAS
CSCD
北大核心
1995年第2期132-139,共8页
Chinese Journal of Solid Mechanics
关键词
脆性损伤
裂纹
二维问题
损伤力学
brittle damage
damage process zone
element vanish technique
fracturetoughness increment
