K型管状接头随机疲劳强度和裂纹扩展规律的研究

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

1.
同济大学固体力学教育部重点实验室, 上海200092;
2.
暨南大学应用力学研究所, 广州510632

基金项目: 上海市重点学科资助

详细信息

作者简介:
聂国华(1964- ),男,江西南昌人,教授,博士,博士生导师,已发表论文40余篇、出版专著一部.

中图分类号: O346.1
计量
- 文章访问数: 2261
- HTML全文浏览量: 70
- PDF下载量: 713
- 被引次数: 0
出版历程
- 收稿日期: 2000-01-28
- 修回日期: 2000-11-21
- 刊出日期: 2001-06-15

An Investigation on Random Fatigue Strength of K-Type Tubular Joints and Crack Propagation Behaviors

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

摘要

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。
- K型管状接头 /
- 随机疲劳 /
- 表面裂纹 /
- 扩展寿命 /
- 断裂力学
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.
- K-type tubular joints /
- random fatigue /
- surface crack /
- life of propagation /
- fracture mechanics

HTML全文

参考文献(16)

[1]	Dover W D, Holdbrook S J, Hibberd R D, et al. F atigue crack growth in T joints; out-of-plane bending[A]. Proc OTC[C]. Paper 3252, Houston: Taxas, 1978.
[2]	Dover W D, Chaudhury G K, Dharmavasan S. Experimental and finite element comparisons of local stresses and compliance in tubular welded T joints[A]. Proc Int Conf on Steel in Marine Structure[C]. Paper No.4.3,Paris,1981.
[3]	Gibstein M B. Fatigue strength of welded tubular joints tested at detnorske veritas laboratories[A]. Proc Int Conf on Steel in Marine Structures[C]. Paper No 8.4,Paris,1981.
[4]	Clayton A M. Assessment of UKOSRP crack growth data to investigate the remaining life of offshore structures after inspection[R]. UKAEA, Report No ND-R-852(R),HSMO,London,1982.
[5]	Paris P, Erdogan F. A critical analysis of crack propagati on laws [J]. Journal of Basic Engineering, Trans ASME,1963,85:528-534.
[6]	Aamodt B. Application of finite element method to problems in linear and nonlinear fracture mechanics[D]. Dr-Ing thesis. Trondheim, Norway: The Norwegian Institute of Technology,1974.
[7]	Newman J C, Raju I S. An empirical stress-intensity factor equation for the surface crack[J]. Engineering Fracture Mechanics,1981,15 (1-2):185-192.
[8]	Shang-Xian W. Shape change of surface crack during fatigue growth [J]. Engineering Fracture Mechanics,1985,22(5):897-913.
[9]	Delft D R V, Dijkstra O D, Snijder H H. The calculation of fatigue crack growth in welded tubular joints using fracture mechanics[A]. Proc OTC [C]. Paper 5352,Houston: Taxas,1986.
[10]	张延宏,柳春图,梅红. 管节点疲劳寿命估算的统计分析方法[J]. 海洋工程,1990,8(4):15-23.
[11]	Nie G H, Weng Z Y. A random numerical simulation analysis of fatigue strength of tubular joints in offshore platforms[A]. Proc of Int Conf on Comp Meth in Struct and Geotech Engng[C]. Hong Kong: The University of Hong Kong,1994,1226-1231.
[12]	聂国华,翁智远,刘人怀. 用概率断裂力学方法预测管状接头的疲劳寿命 [J]. 应用数学和力学,1994,15(11):963-969.
[13]	Lawrence F V, Ho N J, Mazumdar P K. Predicting the fatigue resistance of welds[J]. Ann Rev Mater Sci,1981,11:401-425.
[14]	Dijkstra O D, Snijder H H, Overbeeke J L, et al. Prediction of fatigue crack growth for welded joints using stress intensity factors determined by FEM calculations[A]. Steel in Marine Structures[C]. Amsterdam: The Netherlands,1987,885-899.
[15]	Wylde J G, McDonald A. The influence of joint dimensions on the fatigue strength of welded tubular joints[A]. Proceedings of the Second Inter national Conference on Behavior of Off-Shore Structures[C]. London: England, 1979,535-550.
[16]	McDonald A, Wylde J G. Experimental Results of Fatigue Tests on Tubular Welded Joints, Fatigue in Off-Shore Structural Steels[M]. London,England: Thomas Telford Ltd,1981,89-100.