塑性阶段卸载后的残余应力理论计算及数值模拟*
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(1 西南交通大学土木工程学院,成都 610031；2 长安大学建筑工程学院，西安，710061；3 同济大学土木工程防灾国家重点实验室，上海 200092）[摘要] 以受弯构件和三杆结构为例，推导了塑性阶段卸载后残余应力的理论计算公式，接着通过利用现有的一些大型通用有限元软件的弹塑性分析，比较精确地模拟获得残余应力和残余变形的值，为结构或者构件在反复荷载作用（如地震作用或者疲劳循环作用）下的残余应力分析指出了一条有用的途径。[关键词] 塑性; 残余应力; 计算公式; 数值模拟中图分类号：TU311.3 文献标识码：A 文章编号：1002-848X(2013)S2-0441-04Theoretical calculation and numerical simulation on residual stress after unloading in the plastic phaseLiu Chengqing1, Li Junjun1,Lei Tuo2, Shi Weixing3(1 School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China;2 School of Civil Engineering, Chang’an University, Xi’an 710061, China;3 State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China)Abstract: Theoretical formulas of residual stress were derived in bending members and the structures of three members. Using the existing large elastic-plastic finite element analysis software, the precise simulation of residual stress and residual deformation were carried out. A useful way about the residual stress analysis on the structure or component in the repeated loads was pointed out.Keywords: plastic; residual stress; formula; numerical simulation
