摘要
针对薄膜非线性撕裂的弯曲模型,引入了3种表征薄膜撕裂过程的双参数准则.这3种表征分别为:(1)界面断裂韧度和分离应力; (2)界面断裂韧度和薄膜的裂尖转角; (3)界面断裂韧度和薄膜在裂尖的临界Mises等效应变.从3种双参数准则入手,分析并给出了针对上述各准则的薄膜非线性撕裂问题的解答.通过分析和比较,建立弯曲模型解答与严格平面应变弹塑性分析解答之间的关联.
Based on the bending model for thin film nonlinear peeling, three double-parameter criteria characterizing peeling process are introduced. Three double-parameter characterizations include: (1) the interfacial fracture toughness and the separation strength, (2) the interfacial fracture toughness and the slope angle at crack tip of thin film, and (3) the interfacial fracture toughness and the critical Mises effective strain of thin film at crack tip. Based on the three double-parameter criteria, the thin film nonlinear peeling problems are solved for each case. Through analyses and comparisons for different solutions, the solutions based on the bending model and based on the plane strain elastic-plastic analysis are connected.
出处
《力学学报》
EI
CSCD
北大核心
2003年第6期677-689,共13页
Chinese Journal of Theoretical and Applied Mechanics
基金
国家自然科学基金(19925211)
中国科学院"百人计划"资助项目
