INVESTIGATION ON THE THERMAL FRACTURE BEHAVIORS OF NONHOMOGENEOUS MATERIALS WITH INTERACTION ENERGY INTEGRAL METHOD
(0) Nonhomogeneous materials, especially functionally graded materials (FGMs), possess a number of advantages that make them attractive in many engineering applications. In this study, a plane crack problem of nonhomogeneous materials subject to statically thermal loading is investigated. An interaction energy integral method (IEIM) is adopted to obtain the mixed-mode thermal stress intensity factors (TSIFs). In order to make the path-independence of the IEIM still stand in nonhomogeneous materials under thermal loading, the modified IEIM is proposed. It can be seen that the integrand does not involve any derivatives of material properties except thermal expansion coefficient (CTE) in the modified interaction energy integral. Then, the IEIM is combined with the finite element method (FEM). With the above method, the thermal stress field is computed and the TSIFs of the nonhomogeneous materials are extracted. Some typical examples are presented. It is found that the present method is very effective to study the TSIFs of nonhomogeneous materials.
nonhomogeneous materials interaction energy integral method thermal stress intensity factors
Fengnan Guo Licheng Guo Hongjun Yu Jicai Feng
Department of Astronautic Science and Mechanics, Harbin Institute of Technology,Harbin 150001, China Department of Material Science and Engineering & Department of Astronautic Science and Mechanics,Har Department of Material Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
国际会议
南京
英文
433-436
2010-10-22（万方平台首次上网日期，不代表论文的发表时间）