论文部分内容阅读
针对活性粉末混凝土(RPC200:Reactive Powder Concrete 200MPa)的非线性行为,将连续损伤力学和塑性力学结合起来,建立了RPC200的弹塑性各向异性损伤耦合本构。在有效应力空间内,采用非关联流动法则和非均匀等向强化法则建立了RPC200的塑性本构。基于损伤能释放率建立了损伤准则,并由正交法则给出损伤演化法则,同时采用两个不同的损伤硬化法则来描述拉、压性能不同的损伤硬化。证明了该文所建模型与热动力学基本原理的相容性。最后,给出了RPC弹塑性各向异性损伤耦合本构模型数值计算流程,并以简单例证证明了所建模型的预测能力。
Aiming at the nonlinear behavior of RPC200: Reactive Powder Concrete 200MPa, the continuity damage mechanics and plasticity mechanics are combined to establish a coupling constitutive model of RPC200. In the effective stress space, the plastic constitutive of RPC200 is established by using the non-associated flow rule and the non-uniform isotropic strengthening law. The damage criterion was established based on the release rate of damage energy, and the damage evolution law was given by orthogonal law. At the same time, two different damage hardening rules were used to describe the damage hardening with different tensile and compressive properties. This paper proves the compatibility between the model and thermodynamics. Finally, the numerical calculation procedure of RPC elasto-plastic anisotropic damage coupling constitutive model is given, and a simple example is given to demonstrate the predictive ability of the model.