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首页> 外文期刊>Proceedings of the institution of mechanical engineers >Physical constitutive equations for plastic deformation of FCC metals subjected to high strain rate loading
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Physical constitutive equations for plastic deformation of FCC metals subjected to high strain rate loading

机译：高应变速率载荷下FCC金属塑性变形的物理本构方程

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摘要

This paper develops a new physically based model to investigate face centered cubic (FCC) metals and alloys under high strain rate loadings ( 10(4) s(-1)) which includes kinematics and constitutive equations for the propagation of elastic and steady plastic waves. The model's formulations are based on the rate of the conservation energy law that includes the rate of the input energy, internal energy, and entropy generation. This formulation is obtained by incorporating the viscous drag effects and associating the entropy generation to the generation, glide, and annihilation of dislocations. The model is used for 6061-T6 aluminum alloys and the results are verified with the published theoretical models and experimental tests. Also, the effect of different parameters, such as the particle velocity, shear flow stress, shear strain rate and temperature are investigated. As a result, the presented model shows good capability in describing the mentioned parameters.
机译：本文开发了一个新的基于物理的模型，以研究在高应变速率载荷（> 10（4）s（-1））下面心立方（FCC）金属和合金，其中包括运动学和本构方程，用于弹性和稳定塑料的传播波浪。该模型的公式基于守恒能量定律的速率，包括输入能量，内部能量和熵产生的速率。通过结合粘性阻力效应并将熵的产生与位错的产生，滑移和an灭相关联来获得这种配方。该模型用于6061-T6铝合金，并用已发表的理论模型和实验测试验证了结果。此外，还研究了不同参数的影响，例如粒子速度，剪切流应力，剪切应变率和温度。结果，所提出的模型在描述所提到的参数方面显示出良好的能力。

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