一种新型微孔洞损伤模型

董杰; 李永池; 陈学东

doi:10.11858/gywlxb.2007.04.014

一种新型微孔洞损伤模型

doi: 10.11858/gywlxb.2007.04.014

1.
国家压力容器与管道安全工程技术研究中心，安徽合肥 230031；
2.
中国科学技术大学力学与机械工程系，安徽合肥 230027

详细信息

通讯作者:
李永池

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出版历程
- 收稿日期: 2007-01-26
- 修回日期: 2007-04-24
- 发布日期: 2007-12-05

A New Damage Model of Microvoids

1.
National Technology Research Center on Pressure Vessel and Pipe Line Safety Engineering, Hefei 230031, China;
2.
Department of Mechanics and Mechanical Engineering of USTC, Hefei 230027, China

More Information

Corresponding author: LI Yong-Chi

摘要

摘要: 在前人的基础上引入单位体积微损伤个数概念，从而将宏观损伤参量与微观孔洞体积结合起来，并且在孔洞长大扩展时计入惯性效应的影响，得到了一个新的二次型微孔洞损伤演化方程，指出表面扩张效应和惯性效应分别在孔洞长大的不同阶段起主导作用，最后以921钢板撞击实验为参考，通过比较自由面速度时程曲线，得出的结果与实验相符，验证了本模型的正确性。
- 微损伤个数 /
- 宏微观结合 /
- 微孔洞损伤
Abstract: With introducing the concept of the number of micro-damage in unit volume, macro damage parameter and microvoids volume are unified together, and a new kind of quadratic micro-voids damage evolution equation is acquired. The effect of inertia is considered during the expansion of voids. The expansion of surface and inertia will play a dominant role during the different stage of expansion of voids respectively. After taking the impact experiment of 921 steel as reference and comparing the curves of free surface velocity, the model is proved to be correct since their results are matched well.
- number of micro-damage inertia /
- unification of macro and micro scale /
- microvoids damage

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参考文献(13)

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