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Ⅱ型稳恒扩展裂纹尖端的奇异性场分析

JOURNAL OF HARBIN ENGINEERING UNIVERSITY(2001)

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Abstract
采用弹粘塑性力学模型代替通常的弹塑性模型,求得了不可压缩材料中Ⅱ型平面应变动态扩展裂纹尖端的指数奇异性场,并对不同的粘性系数和马赫数进行了数值计算,给出了应力场分布随粘性系数和马赫数的变化规律.其结果不仅消除了弹塑性解中存在的塑性激波,而且当马赫数趋于零时便退化成准静态解,从而解决了其它模型中存在的问题.
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