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本文首先根据描写复杂载荷作用下材料特征行为的需要, 提出结合Dafalias双面模型和广义Hodge混合硬化模型两者特点的新的本构模型,并给出此模型本构方程的似近解析积分表达式。针对复杂载荷作用下的结构弹塑性分析的特点,本文还提出若干算法措施,以保证计算机执行过程的可靠性和有效性。实际算例的结果表明本文所提出的本构模型及算法措施是可行的。
In this paper, firstly, according to the need of describing the characteristic behavior of materials under complex loads, a new constitutive model combining the features of the Dafalias double-sided model and the generalized Hodge mixed hardening model is proposed, and the near-analytical integral expression of the model constitutive equation is given. formula. In view of the characteristics of structural elasto-plastic analysis under complex loads, several algorithmic measures are also proposed in this paper to ensure the reliability and effectiveness of the computer execution process. The results of practical examples show that the proposed constitutive model and algorithm measures are feasible.