考虑材料应变硬化的结构极限分析的弹性模量缩减法
Abstract
基于应变能等效原则求解了考虑材料应变硬化的等效屈服强度,建立了双线性、幂强化和Ramberg-Osgood材料的等效弹塑性模型,定义了基于等效屈服强度的单元承载比,给出了动态识别高承载单元的基准承载比,利用变形能守恒原则确定了高承载单元的弹性模量缩减策略,进而建立了考虑材料应变硬化结构极限分析的弹性模量缩减法,解除了弹性模量调整法受理想弹塑性材料本构关系的限制,可应用于考虑材料应变硬化的结构承载力设计与安全评估中.
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Key words
material strain hardening,limit analysis,elastic modulus reduction method,equivalent elastic-perfectly plastic model,strain energy equivalence
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