| K型管状接头随机疲劳强度和裂纹扩展规律的研究 |
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| 引用本文： | 聂国华,张若京,刘人怀. K型管状接头随机疲劳强度和裂纹扩展规律的研究[J]. 应用数学和力学, 2001, 22(6): 572-578 |
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| 作者姓名： | 聂国华 张若京 刘人怀 |
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| 作者单位： | 1.同济大学固体力学教育部重点实验室, 上海200092; |
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| 基金项目： | 上海市重点学科资助项目 |
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| 摘 要： | 分析了K型焊接管状接头受轴向和面外弯曲载荷作用下的随机疲劳问题。通过将焊趾处的表面裂纹的初始尺寸和材料常数作为随机变量处理,并计及焊缝的影响,共产生500个随机样本,最终得到裂纹扩展寿命和裂纹形状变化影响的统计计算结果,并与有关实验数据比较,给予了回归分析。同时,也考察了裂纹扩展规律。
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| 关 键 词： | K型管状接头 随机疲劳 表面裂纹 扩展寿命 断裂力学 |
| 文章编号： | 1000-0887(2001)06-0572-07 |
| 收稿时间： | 2000-01-28 |
| 修稿时间： | 2000-01-28 |
An Investigation on RandomFatigue Strength of K-Type Tubular Joints and Crack Propagation Behaviors |
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| NIE Guo-hua,ZHANG Ruo-jing,LIU Ren-huai. An Investigation on RandomFatigue Strength of K-Type Tubular Joints and Crack Propagation Behaviors[J]. Applied Mathematics and Mechanics, 2001, 22(6): 572-578 |
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| Authors: | NIE Guo-hua ZHANG Ruo-jing LIU Ren-huai |
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| Affiliation: | 1.Key Laboratory of Solid Mechanics of MOE, Tongji University, Shanghai 200092, P R China;2.Institute of Applied Mechanics, Jinan University, Guangzhou 510632, P R China |
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| Abstract: | Random fatigue of welded K_type tubular joints subjected to axial or out_of_plane bending load is analyzed. By considering the sizes of initial surface cracks and material constants as random variables with some probabilistic distributions, incorporating the effect of the weld, five hundred random samples are generated. Statistical computational results of life of crack propagation and effect of change of crack shape are finally obtained and compared with experimental data available based on a regression analysis. Meanwhile, crack propagation behaviors are also investigated. |
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| Keywords: | K_type tubular joints random fatigue surface crack life of propagation fracture mechanics |
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