| 论裂纹扩展J积分阻力曲线变化规律的影响因素 |
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| 引用本文： | 李肇飞,马光辉.论裂纹扩展J积分阻力曲线变化规律的影响因素[J].强度与环境,1999(4):38-45. |
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| 作者姓名： | 李肇飞 马光辉 |
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| 作者单位： | 青岛建筑工程学院基础部!青岛，266033(李肇飞)，西安航空发动机公司设计所!西安，710021(马光辉) |
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| 摘 要： | 本文对大塑性变形条件下，裂纹稳定扩展过程的J积分阻力曲线变化规律进行了全面的分析。给出了不同约束条件下dJ／da与试样的载荷因子L、裂纹尖端张开角CTOA及裂纹扩展时的瞬时旋转中心的系数r之间的理论表达式。从而论证了不同约束条件下，试样的几何尺寸因素对其J阻力曲线变化趋势的影响规律。
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| 关 键 词： | 裂纹扩展 断裂韧性 阻力曲线 |
An Interpretaion of J-R Curves Dependence on Geometric Size of Test Piece |
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| Li Zhaofei.An Interpretaion of J-R Curves Dependence on Geometric Size of Test Piece[J].Structure & Environment Engineering,1999(4):38-45. |
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| Authors: | Li Zhaofei |
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| Abstract: | An analysis is given on the whole J-R curve pattern which is got under stable crack growthin a fully plastic region. The formulas for dJ/da with load factor L of test piece,CTOA and instantaneousfactor of rotation r has been given. As a result,the effects of geometric size of test piece on J-R curve un-der different degree of constraint are argued. |
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| Keywords: | Crack propagation Fracture toughness Resistance curve |
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