光滑薄壁管件的多轴循环弹塑性有限元分析  

Elastoplastic Finite Element Analysis of Smoothing Specimen Under Multiaxial Cycle Loading

作　　者：孙国芹[1] 尚德广[1] 丁雷[1] 邓静[1] 贾冠华[1] 阎楚良[1] 

机构地区：[1]北京工业大学机械工程与应用电子技术学院,北京100022

出　　处：《北京工业大学学报》2007年第3期235-239,共5页Journal of Beijing University of Technology

基　　金：国家自然科学基金(10172010)

摘　　要：为数值模拟构件在多轴循环加载下的应力应变响应,利用ANSYS分析软件对承受高温2轴比例与非比例循环拉扭加载下的光滑薄壁管件进行了弹塑性有限元分析．分析模拟过程中,采用von Mises屈服准则、多线性随动强化准则和高温单轴循环加载的应力应变数据来描述材料高温弹塑性特性．采用柱坐标系下在试样一端加轴向位移和周向位移来实现拉扭应变加载．通过对光滑薄壁管件的后处理结果与试验比较表明,采用的循环弹塑性有限元分析得到的结果与试验结果相吻合．To numerically simulate the stress-strain response of the components under multiaxial cyclic loading, an elastoplastic finite element analysis was adopted to thin tubular specimens under multiaxial proportional and nonproportional tension/torsion loading at high temperature. Finite element modeling was founded by ANSYS FEA software. Elastoplastic material property under high temperature was described by the yon Mises yield criterion and the multilinear kinematic hardening rule and uniaxial cyclic stress-strain data under high temperature. Triangle waves were used in the proportional and nonproportiaonal loading. Tension-torsion loading with strain controlling was carried out by applying the axial and circular displacement on one end of the specimen in the cylindrical coordinate system. It had a good agreement between postprocessing results of the thin tubular specimens and the test results.

关 键 词：弹塑性 有限元法 疲劳 应变控制 多轴 迟滞迥线 

分 类 号：O346.2[理学—固体力学]