平面应变脆性损伤裂纹场分析  

BRITTLE-DAMAGE OF CRACKS UNDER CONDITIONS OF PLANE-STRAIN TENSILE LOADING

作　　者：郭田福[1] 杨卫[1] 

机构地区：[1]北京航空航天大学,清华大学工程力学系

出　　处：《固体力学学报》1995年第2期132-139,共8页Chinese Journal of Solid Mechanics

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.

关 键 词：脆性损伤 裂纹 二维问题 损伤力学 

分 类 号：O346.5[理学—固体力学]