YANG Da-peng, CHEN Xi, ZHAO Yao, LI Tian-yun. The J Integral of a Slightly Curved Elasticity-plasticity Crack when Enduring Quasi Static Loads[J]. International Journal of Plant Engineering and Management, 2014, 19(1): 6-11

The J Integral of a Slightly Curved Elasticity-plasticity Crack when Enduring Quasi Static Loads
YANG Da-peng, CHEN Xi, ZHAO Yao, LI Tian-yun
Machanical Engineering Department,Zhengzhou Technical College,Zhengzhou 450121,P.R. China
The J Integral of an elastic-plastic curved crack under quasi-static loads has been mainly worked in the paper,and the J Integral has been calculated as a practical application of a second order perturbation method and theorem of surname KA where the effect of quasi-static applied stresses and normal and shear stresses on the boundaries of plasticity area are synthetically taken into consideration.A regular pattern of variations of the J Integral of an elastic-plastic curved crack with the variations of curved crack shape parameters under different quasi-static loads has been mainly carried out.Continuity and unity of a elastic-plastic fracture and linear elastic fracture has been demonstrated from the viewpoint of the mechanical parameter of the curved crack tip J integral.The elastic-plastic slightly curved crack tip J integral has been calculated approximately,an integral loop having been reasonably selected and continuity and unity of the fracture characteristic of centre penetration straight line crack and curved crack have been demonstrated.
Key words:    curved crack    quasi-static    second order perturbation solution    J Integral   
Received: 2014-01-25     Revised:
DOI: 10.13434/j.cnki.1007-4546.2014.0102
Funds: The paper is supported by Research the National Natural Science Foundation of China under Grant No.91016026
Corresponding author:     Email:
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