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该文基于一种弹塑性损伤本构模型,分析了材料在有限变形下的力学行为及结构力学响应。将模型建立的本构方程进行线性化处理,嵌入到有限元计算软件ABAQUS的子程序中,实现模型在结构计算中的应用。针对铝合金材料(6061-T6),建立了两种不同的结构模型进行数值模拟。模拟结果与实验结果对比表明,模型能较好地描述材料的变形过程及结构的力学行为。最后基于模型的理论基础,分析了材料在超出弹性范围时的复杂变形行为。
Based on an elasto-plastic damage constitutive model, the mechanical behavior and structural mechanical response of the material under finite deformation are analyzed. The constitutive equation established by the model is linearized and embedded into the subroutine of finite element calculation software ABAQUS to realize the application of the model in structural calculation. For the aluminum alloy material (6061-T6), two different structural models were established for numerical simulation. The simulation results and experimental results show that the model can describe the deformation process and the mechanical behavior of the structure well. Finally, based on the theoretical basis of the model, the complex deformation behavior of the material beyond the elastic range was analyzed.