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Articles:2016,Vol:21,Issue(2):115-128 |
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Citation: |
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YANG Da-peng, PAN Hai-yang, ZHAO Yao, LI Tian-yun. Prediction of Three Dimensional Crack Path Brittle Fracture in Weldment under Dynamic Load[J]. International Journal of Plant Engineering and Management, 2016, 21(2): 115-128 |
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| Prediction of Three Dimensional Crack Path Brittle Fracture in Weldment under Dynamic Load |
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| YANG Da-peng1,2, PAN Hai-yang3, ZHAO Yao2, LI Tian-yun2 |
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1 Mechanical Engineering Department, Zhengzhou Technical College, Zhengzhou 450121, P. R. China;
2 School of Naval Architecture & Ocean Engineering, Huazhong University of Science and Technology, Wuhan 430074, P. R. China;
3 Urban Rail Transport Department, Zhengzhou Technical College, Zhengzhou 450121, P. R. China |
| Abstract: |
| Three dimensional dynamic stress intensity factors are analyzed for a curved crack with a second order perturbation method. The method is extended to obtain an approximate representation of a three dimensional dynamic stress intensity factors at the tip of a curved crack. Due to three dimensional curved crack growth the dynamic energy release rate can be calculated by using the Irwin's formula. A three dimensional curved crack in materials with inhomogeneous fracture toughness are considered. Paths of a brittle three dimensional curved crack propagating along a welded joint are predicted via the present method, where the effects of dynamic applied stresses, residual stresses, and material deterioration due to welding are taken into considerations. |
| Key words:
three dimensional dynamic stress intensity factor
curved crack
second order perturbation method
dynamic energy release rate
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| Received: 2016-04-28
Revised:
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| DOI: 10.13434/j.cnki.1007-4546.2016.0206 |
| Funds: This paper is supported by National Natural Science Foundation of China(No. 91016026), Henan Province Natural Science Foundation Subsidy Project(No. 152300410003). |
| Corresponding author:
Email：ydpzpysh@163.com |
| Author description:
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References: |
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