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稳恒扩展裂纹尖端的弹粘塑性场
引用本文:贾斌,王振清,李永东,范学伟.稳恒扩展裂纹尖端的弹粘塑性场[J].应用力学学报,2003,20(1):64-69.
作者姓名:贾斌  王振清  李永东  范学伟
作者单位:1. 哈尔滨工程大学,哈尔滨,150001
2. 北方交通大学,北京,100044
基金项目:黑龙江省博士后启动基金资助
摘    要:采用弹粘塑性力学模型代替通常的弹塑性模型,对于I型和Ⅱ型问题,分别求得了不可压缩材料中平面应变动态扩展裂纹尖端的指数奇异性场和对数奇异性场,消除了弹塑性解中存在的塑性激波。通过数值计算,分别求得了两种奇异属性的分界线,建立起统一的裂纹尖端奇异性场。

关 键 词:弹粘塑性材料  动态扩展  粘性系数  马赫数
文章编号:1000-4939(2003)01-0064-06
修稿时间:2000年4月9日

The Elastic-viscoplastic Field of a Steady Propagating Crack Tip
Jia Bin,Wang Zhenqing,Li Yongdong,Fan Xuewei.The Elastic-viscoplastic Field of a Steady Propagating Crack Tip[J].Chinese Journal of Applied Mechanics,2003,20(1):64-69.
Authors:Jia Bin  Wang Zhenqing  Li Yongdong  Fan Xuewei
Institution:Jia Bin 1 Wang Zhenqing 1 Li Yongdong 1 Fan Xuewei 2
Abstract:An elastic-viscoplastic model is adopted to replace t he ordinary elastic-plastic one in this paper. Based on this, for mode I and II p roblems, the power law and logarithm singular tip field moving crack of an inco mpressible material under plane strain is obtained respectively. The results sho w that the plastic shock existed in elastic-plastic model is eliminated. The di vision of the two singular fields is obtained through numerical computation and the unified singular crack-tip field is established.
Keywords:elastic-viscoplastic material  dynamic propaga tion  viscosity coefficient  mach number  
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