| 弹黏塑性材料稳恒扩展II型裂纹尖端应力场 |
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| 引用本文： | 王振清,周博,梁文彦,王纪滨,王永军.弹黏塑性材料稳恒扩展II型裂纹尖端应力场[J].航空学报,2006(3). |
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| 作者姓名： | 王振清 周博 梁文彦 王纪滨 王永军 |
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| 作者单位： | 哈尔滨工程大学航天工程系 黑龙江哈尔滨150001 |
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| 基金项目： | 哈尔滨工程大学基础基金(002020260707)资助项目 |
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| 摘 要： | 采用弹黏塑性力学模型,对II型动态扩展裂纹尖端应力场的对数奇异性,进行了分析计算。详细地分析了黏性系数α、马赫数Ma2对裂纹尖端的应力场影响。指出了对数奇异性区域存在的问题,解释了过渡区的成因,对过渡区尖端场解的形式和求解方法做了合理的推测。
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| 关 键 词： | 弹黏塑性材料 黏性系数 马赫数 动态扩展 仿真分析 |
Tip Stress Field of Mode II Crowing Steadily in Elastic-Viscoplastic Materials |
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| WANG Zhen-qing,ZHOU Bo,LIANG Wen-yan,WANG Ji-bin,WANG Yong-jun.Tip Stress Field of Mode II Crowing Steadily in Elastic-Viscoplastic Materials[J].Acta Aeronautica et Astronautica Sinica,2006(3). |
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| Authors: | WANG Zhen-qing ZHOU Bo LIANG Wen-yan WANG Ji-bin WANG Yong-jun |
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| Abstract: | An elastic viscoplastic constitutive mode is given in this paper.Based on it,the numerical computation of lnR/r singular in the mode II dynamic crack's tip field is carried out.The relationships between stress field distribution and viscosity coefficients and mach numbers are given.The problem existed in ln(R/r) singular zone is given.The cause of the transitional zone is given.The form of stress field in the transitional zone and it's solving method are guessed rationally. |
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| Keywords: | elastic-viscoplastic materials viscosity coefficient Mach number dynamic crowing simulation analysis |
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