| 用光塑性方法确定工程构件的疲劳裂纹扩展荷载门槛值 |
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| 引用本文： | 沈庆,蔡传国.用光塑性方法确定工程构件的疲劳裂纹扩展荷载门槛值[J].实验力学,1999,14(1):8-13. |
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| 作者姓名： | 沈庆 蔡传国 |
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| 作者单位： | 工程兵工程学院濒海工程技术研究所 |
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| 摘 要： | 提出疲劳裂纹尖端塑性核半径门榄值Ｒｔｈ的概念及计算方法，Ｒｔｈ是材料性质，在满足光塑性相似关系要求及模型与原型几何形状尺寸相同的前提下，模型与原型间的相似系数ｎ为两种材料屈服极限之比。
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| 关 键 词： | 疲劳裂纹 裂纹扩展 门槛植 光塑性 工程构件 |
Determination of the Threshold Value for Fatigue Crack Extension Load by Photo Plasticity Method |
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| SHEN Qing,CAI Chuanguo.Determination of the Threshold Value for Fatigue Crack Extension Load by Photo Plasticity Method[J].Journal of Experimental Mechanics,1999,14(1):8-13. |
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| Authors: | SHEN Qing CAI Chuanguo |
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| Abstract: | In this paper, a concept for the radius of plastic core at the top of a fatigue crack is raised. It is shown that by examining this radius of plastic core for a model at static load with a polarizing optical instrument, the threshold value of the fatigue crack extension load for the prototype of a engineering part can be deduced on the basis of similarity law. |
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| Keywords: | fatigue crack crack extension threshold value photo plasticity |
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