| 关于应变率敏感系数的定义 |
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| 引用本文： | 赵亚溥,刘胜.关于应变率敏感系数的定义[J].中国航空学报,2001,14(2). |
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| 作者姓名： | 赵亚溥 刘胜 |
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| 作者单位： | ZHAO Ya-pu1,LIU Sheng2 (1. LNM Institute of Mechanics,Chinese Academy of Sciences,Beijing 100080,China) (2. Dept of Mech. Engng,Wayne State University,Detroit,USA) |
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| 基金项目： | the NSFC(No.10072068 and No.1992820),the National "973"Program |
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| 摘 要： | 应变率敏感系数是宏观塑性动力学和位错动力学的一个基本概念,本文试图对其进行了重新解释。由于强动载荷作用下一般固体要发生有限变形的动力响应,还将应变率敏感系数推广到塑性动力大变形情形。本文也指出了由于应变率敏感性所引起的内耗增量和过应力的类比性。
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| 关 键 词： | 塑性应变率 应变率敏感 过应力 位错动力学 有限变形 内耗 |
On the Definition of Coefficient of Strain-rate Sensitivity |
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| ZHAO Ya-pu,LIU Sheng.On the Definition of Coefficient of Strain-rate Sensitivity[J].Chinese Journal of Aeronautics,2001,14(2). |
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| Authors: | ZHAO Ya-pu LIU Sheng |
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| Abstract: | An attempt is made to elaborate the definition of the coefficient of strain-rate sensitivity, which is a fundamental concept for macroscopic dynamic plasticity and dislocation dynamics. Since a solid subjected to large dynamic loading usually undergoes dynamic response with finite deformation, therefore, the definition of this coefficient is also put forward to the case of large dynamic plastic deformation. The analogy between internal friction increment and overstress due to strain-rate sensitivity is clarified. |
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| Keywords: | plastic strain rate strain-rate sensitivity overstress dislocation dynamics finite deformation internal friction |
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