论文部分内容阅读
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.
Based on the principle of strain energy equivalence, the equivalent yield strength considering the strain hardening of the material was solved. The equivalent elastoplastic model of bilinear, exponentiation and Ramberg-Osgood materials was established, and the element bearing ratio based on equivalent yield strength was defined. Based on the principle of conservation of deformation energy, the elastic modulus reduction strategy of high load bearing element is given. Then the elastic modulus reduction method which takes into account the limit analysis of the strain hardening structure is established, and the elastic modulus The modulus adjustment method accepts the constitutive relation of the elastoplastic material and can be used in the design and safety assessment of the structural bearing capacity of the material considering the strain hardening.