| 根据超声探伤信息判断裂纹构件的可靠性 |
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| 引用本文： | 张培源. 根据超声探伤信息判断裂纹构件的可靠性[J]. 重庆大学学报(自然科学版), 1988, 11(2) |
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| 作者姓名： | 张培源 |
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| 作者单位： | 重庆大学工程力学系 |
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| 摘 要： | 根据超声探伤可以确定内埋裂纹的当量面积。当内埋裂纹呈椭圆片状且面积保持一定时,由半长轴的随机分布和材料平面应变断裂韧性的随机分布可以得到构件在均匀拉应力下可靠工作的概率。本文讨论这种情况下的可靠性计算公式。由于引入了一个形式简单又有足够精度的近似,本文所得结果容易得到应用。
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| 关 键 词： | 超声波 探伤 裂纹 平面应变断裂韧性 随机分布 可靠性 |
DETERMING THE RELIABILITY OF A MEMBER WITH CRACK ACCORDING TO THE INFORMATION FROM FLAW-DETECTION WITH ULTRASONIC WAVE |
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| Zhang Peiyuan. DETERMING THE RELIABILITY OF A MEMBER WITH CRACK ACCORDING TO THE INFORMATION FROM FLAW-DETECTION WITH ULTRASONIC WAVE[J]. Journal of Chongqing University(Natural Science Edition), 1988, 11(2) |
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| Authors: | Zhang Peiyuan |
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| Affiliation: | Zhang Peiyuan |
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| Abstract: | Using the flaw-detecting with ultrasonic wave one may know the equivalant area of a crack that burys in the member. If the crack is ellipse shaped, the equivalant area is constant, and the distribution function of its major semiaxle and the plane strain fracture toughness of the material are given, then we would get the probability of reliability of the member under the uniform tension. In this condition, a formula of calculating the probability would be provided in this paper. Because a simple and enough precise approximate function has been introduced the formula in the paper is simple in shape and easy to use. |
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| Keywords: | ultrasonic wave flaw-detection crack plane strain fracture toughness random distribution reliability |
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