Cohesion fracture model for elastic medium

摘要：

　　To re-examine the shape effect of cohesive traction-separation curve and the cohesive zone size for crack growth, an elastic background medium with a center crack is employed.Using the method of Fredholm integral equation, the constitutive equation between cohesive traction and separation was obtained, and the relation between the linear elastic fracture mechanics(LEFM) and cohesive zone models in the case of cohesive zone development and crack growth in infinite elastic medium was discussed.The calculating results show that the shape of cohesive curve for elastic medium materials affects the cohesive zone size and the apparent energy release rate of LEFM for the crack growth, and the apparent energy release rate of LEFM approaches the cohesive energy density when the crack extends significantly longer than the characteristic length of the cohesive zone.

关键词： Cohesive zone model crack growth elastic material fracture stress singularity

作者: SANG Yuan-cheng DUAN Hong-yan WANG Zhi-ming

作者单位: School Of Mechanical & Electronical Engineering,Lan Zhou University of Technology, Lanzhou 730050, China

会议类型: 国际会议

会议名称: The 9th China-Japan Bilateral Symposium on Hiigh Temperature Strength of Materials(第九届中日双边高温材料强度国际学术研讨会)

会议地点: 长沙

会议语种:英文

页码: 104-109

在线出版日期: 2016-10-16（万方平台首次上网日期，不代表论文的发表时间）