粘弹塑性杆系结构的非线性分析  

NONLINEAR ANALYSIS OF A STATICALLY INDETERMINATE ELASTICVISCOPLASTIC TRUSS

作　　者：余激扬 杨挺青[2] 杨正文[2] 

机构地区：[1]东方电机厂 [2]华中理工大学

出　　处：《工程力学》1992年第4期70-76,共7页Engineering Mechanics

基　　金：国家自然科学基金资助项目

摘　　要：本文对粘弹塑性静不定结构进行非线性有限元分析。材料非线性粘弹塑性行为通过幂律函数和指数函数综合表征;计算分析了等加载率受载情况下简单杆系结构的应力、应变和应变率的变化及影响因素;研究了恒载荷作用时杆系的蠕变规律。A nonlinear finite element formulation is given for a statically indeterminate elasticviscoplastic structure in the present paper. The nonlinear behavior of material is characterized by a coupling of power law with exponential function. Variations of stresses, strains and strain rates in a coplanar truss are studied in the case of constant loading rate. Meanwhile, the creep is also investigated when the structure is subjected to a constant external force.

关 键 词：非线性 粘弹塑性 有限元 杆系结构 

分 类 号：TU323[建筑科学—结构工程]