PREDICTION OF CREEP CRACK INITIATION UNDER THE INTERACTION BETWEEN LONG RANGE RESIDUAL STRESS AND APPLIED LOAD
In this paper, a three bar structure is examined to simulate the behaviour of a component subjected to combined applied and residual stresses. This structure (or system) permits long-range residual stress to be created in a compact tension (CT) specimen through the introduction of a misfit. The magnitudes of the residual and applied stresses in the CT specimen are a function of the initial misfit displacements, applied load and the relative stiffness of the components of the system. The prediction of cracking initiation under combinations of residual and apply loads are investigated when the compact tension specimen creep according to a power law. We find that the creep crack initiation time is sensitive to the assumed creep constants and is significantly different under different loading conditions. The effect of residual stress on the crack initiation time is dependent on the ratio of the residual stress to the total stress. Overall, this study provides important insights into the assumptions adopted in structural analysis for creep crack initiation.
Crack initiation Residual stress elastic follow-up 316H stainless steel
Yiqiang Wang David J Smith Christopher E Truman A. M. Shirahatti
Department of Mechanical Engineering,University of Bristol,BS8 1TR,UK
国际会议
北京
英文
1-11
2013-06-16（万方平台首次上网日期，不代表论文的发表时间）