多轴比例加载下镍基合金GH4169试件的弹塑性有限元分析  

ELASTIC-PLASTIC FINITE ELEMENT ANALYSIS OF NICKEL-BASED SUPERALLOY GH4169 UNDER MULTIAXIAL PROPORTIONAL LOADING

作　　者：陈建华[1] 尚德广[1] 孙国芹[1] 

机构地区：[1]北京工业大学机电学院,北京100022

出　　处：《机械强度》2007年第4期620-626,共7页Journal of Mechanical Strength

基　　金：国家自然科学基金(10172010);北京市高校拔尖创新人才资助项目~~

摘　　要：对薄壁管进行多轴恒幅比例加载疲劳试验,并运用弹塑性有限元法对该加载条件下的薄壁管进行分析和计算,材料弹塑性特性由von Mises屈服准则和多线性随动硬化准则描述。结果表明,用有限元法计算的试件应力应变值与试验结果吻合。最后,用此方法对缺口件危险点处应力应变状态进行分析。The thin tubular specimens are used to carry out the multiaxial fatigue tests under proportional loading with constant amplitudes. The stress and strain of tubular specimen subjected to proportional loading are analyzed by the elastic-plastic finite element method with von Mises yield criterion and multilinear kinematic hardening rule. The results showed that the calculated stress-strain values by FEM（finite element method） have good agreement with the experimental results. Finally the stress-strain state of the critical position for notched specimen is analyzed and calculated by the proposed finite element model.

关 键 词：有限元法 比例加载 缺口件 

分 类 号：TG146.15[一般工业技术—材料科学与工程] TB115[金属学及工艺—金属材料]