The J Integral of a Slightly Curved Elasticity-plasticity Crack when Enduring Quasi Static Loads 被引量：1

The J Integral of a Slightly Curved Elasticity-plasticity Crack when Enduring Quasi Static Loads

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摘要 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. 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.

作者 YANG Da-peng CHEN Xi ZHAO Yao LI Tian-yun

机构地区 Machanical Engineering Department

出处《International Journal of Plant Engineering and Management》 2014年第1期6-11,共6页 国际设备工程与管理（英文版）

基金 supported by Research the National Natural Science Foundation of China under Grant No.91016026

关键词 curved crack QUASI-STATIC second order perturbation solution J Integral curved crack quasi-static second order perturbation solution J Integral

分类号 O346.1 [理学—固体力学]

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参考文献12

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