A GENERAL FORMULATION FOR DETERMINING THE DEFORMATION RATE OF TWO-MATERIAL CT SPECIMENS WITH AN INTERFACE CRACK AND ITS APPLICATION IN PREDICTING C* INTEGRAL
A general formulation for predicting the deformation rates, for structures which approximate to statically determinate structures, is proposed; it is based on analytical solutions for steadystate creep deformation rates for two- and three-material components with simple geometries. As an example, a CT specimen consisting of two materials, with an interface crack, was studied and the method for predicting the deformation rates, by using the proposed general formulation, has been established. The advantages of this method are related to the fact that only a small number of finite element (FE) analysis are required to enable a simple and compact method to be used to predict the deformation rates for any combination of material properties. Based on this method, a simple equation for predicting the C* integral of CT specimens, consisting of two materials with an interface crack, is proposed and used to investigate the accuracy of the general formulation. By comparing the results of C* integral obtained from the equation and FE analyses, for a wide range of material mismatch properties, it was found that the predicted C* values were in very good agreement with the FE results.
Z. J. Hu T. H. Hyde W. Sun S. Halighongde
School of Environmental Science and Engineering, Nanchang University, 330031, P.R. China;School of M School of Mechanical, Material and Manufacturing Engineering, University of Nottingham, UK, NG7 2RD
国际会议
第九届工程结构完整性国际会议(The Ninth International Conference on Engineering Structural Integrity Assessment)
北京
英文
2007-10-15（万方平台首次上网日期，不代表论文的发表时间）