STUDY ON DYNAMIC J-INTEGRAL OF MECHANICAL HETEROGENEOUS WELDED JOINT

金属学报(英文版), 2004, 17(6): 934-939.

^1, , ^2, , ^3, , ^4, , ^5,

1.Institute of Composite Materials, Shanghai Jiaotong University, Shanghai 200030, China

2.School of Materials Science and Engineering, Beijing Polytechnic University, Beijing 100022, China

3.School of Materials Science and Engineering, Beijing Polytechnic University, Beijing 100022, China

4.School of Materials Science and Engineering, Beijing Polytechnic University, Beijing 100022, China

5.Institute of Composite Materials, Shanghai Jiaotong University, Shanghai 200030, China

基金项目: Science and Technology New Star Project of Beijing 国家自然科学基金(59501011)

STUDY ON DYNAMIC J-INTEGRAL OF MECHANICAL HETEROGENEOUS WELDED JOINT

Keywords： virtual crack extension

Welded joint is a mechanical heterogeneous body, and mechanical heterogeneity has great effect on dynamic fracture behaviour of welded joints. In the present investigation, dynamic response curve and dynamic J-integral of practical undermatched welded joint and whole base and whole weld three-point-bend (TPB) models containing longitudinal crack are computed. Dynamic J-integral is evaluated using virtual crack extension (VCE) method and the computation is performed using MARC finite element code. Because of the effect of inertia,dynamic load response curve of computed model waves periodically. Dynamic J-integral evaluated by VCE method is path independent. The effect of inertia has little influence on dynamic J-integral curve. The value of dynamic J-integral of undermatched welded joint is lower than that of whole base metal and higher than that of whole weld metal. The results establish the foundation of safety evaluation for dynamic loaded welded structures.

参考文献

[1]	J R Rice.[J].Journal of Applied Mechanics,Transactions ASME:379.
[2]	W Ma;S Zhang;X Tian.[J].China Mechanical Engineering:43.
[3]	J Zhang;Y Shi;M Tu.[J].Engineering Fracture Mechanics,1989:1041.
[4]	T K Hellen.The 2nd Int.Conf.on Structural Mechanics in Reactor Technology,ed.T.A.Jaeger[C].Berlin,1973:G5/3.
[5]	D M Parks.[J].International Journal of Fracture:487.
[6]	H G Delorenzi.[J].Engineering Fracture Mechanics,1985:129.
[7]	MARC,Theory and User Information[M].MARC Analysis Research Corporation,USA,1997:5.
[8]	Y Ueda;Y Shi;S Sun;H Murakawa.[J].Transactions of JWRI(Joining and Welding Research Institute of Osaka University):133.
[9]	T Kobayashi.[J].Engineering Fracture Mechanics,1984:67.

上一张下一张

计量

下载量()
访问量()

作者相关

在本站搜索
在百度学术搜索
在万方数据库搜索
在CNKI搜索

文章评分

您的评分：
1

0%
2

0%
3

0%
4

0%
5

0%

材料期刊网

STUDY ON DYNAMIC J-INTEGRAL OF MECHANICAL HETEROGENEOUS WELDED JOINT

参考文献