摘要
基于经典守恒积分方法对刚性压头冲压平板情况下应力强度因子(SIF)进行数值分析,应有有限元软件模拟冲压形成的奇异应力场,并计算应力强度因子。比较了几组具有不同弹性模量和泊松比的应力强度因子,研究其与断裂韧性之间关系得出变化规律。工程中可利用奇异应力场数值分析结果研究材料的破坏行为、测试材料的机械性能。
Numerical analysis of the stress intensity factor（SIF） induced by indentations was proposed based on the conservation integral.Simulation of the intensification of the stress fields by software of finite element method.The stress intensity factor for such stress fields was calculated.The SIF with different elastic modulus and poisson ratio was compared,focused on the relation between SIF and fracture toughness,and investigated the change law.Use the numerical result to researching damage behavior of material and testing the mechanical properties in engineering.
出处
《石油化工高等学校学报》
CAS
2012年第4期77-80,共4页
Journal of Petrochemical Universities
基金
国家自然科学基金(50771052
50971068)
辽宁省自然基金项目(20082188)
辽宁省教育厅重点实验室项目(LS2010100)
关键词
断裂
冲压
应力强度因子
弹性模量
数值分析
Fracture； Indentation； Stress intensity factor； Elastic modulus； Numerical analysis
