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首页> 外文期刊>International Journal of Plasticity >Kinematic hardening model considering directional hardening response
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Kinematic hardening model considering directional hardening response

机译：考虑定向硬化反应的运动硬化模型

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This paper proposes a kinematic hardening model to capture both asymmetric plastic behavior (early-reyielding, transient Bauschinger effect and permanent softening) and directional hardening (anisotropic hardening) response at the same time. The previously reported kinematic hardening models have brought significant improvements of ability to describe the asymmetric plastic behavior of sheet metal in cycling loading conditions at fixed one angle from the rolling direction (RD). However, their inability to cover the anisotropy in the directional hardening response has a limitation to describe the anisotropic hardening behavior because material constants of general kinematic hardening models are only fitted to one reference axis. In order to capture the anisotropic hardening with a kinematic hardening model, this work proposes a scheme to combine a kinematic hardening model with a function, which is called the condition function in this paper, to account for the change of the mechanical property with respect to the RD. The condition function should explicitly capture four independent hardening data in different directions, 0 degrees, 45 degrees, 90 degrees to the RD and the equal biaxial (EB) condition in order to gain an appropriate parameter set. The new model is validated with four tests and the results are compared with other material models to clearly show that the new model can capture both the anisotropic hardening response and the asymmetric plastic behavior for monotonic and cycling loading conditions.
机译：本文提出了一种运动化硬化模型，以捕获不对称塑性行为（早期屈雷，短暂的Bauschinger效应和永久性软化）和定向硬化（各向异性硬化）反应。先前报道的运动硬化模型具有在从滚动方向（RD）固定一个角度的循环负载条件下描述金属板的不对称塑性行为的能力显着改善。然而，它们在定向硬化响应中的各向异性覆盖各向异性有限性地描述各向异性硬化行为，因为一般运动硬化模型的材料常数仅适用于一个参考轴。为了用运动化硬化模型捕获各向异性硬化，该工作提出了一种将运动硬化模型与函数组合的方案，该功能在本文中称为条件功能，以解释机械性能相对于的变化rd。条件函数应在不同方向上显式捕获四个独立的硬化数据，0度，45度，90度到RD和等于双轴（EB）条件，以获得适当的参数集。新模型被验证有四个测试，并将结果与​​其他材料模型进行比较，以清楚地表明新模型可以捕获各向异性硬化响应和单调和循环加载条件的不对称塑性行为。

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