Steady Thermal Stress in a Ceramic/FGM/Metal Composite EFBC Plate Considered Temperature Dependency
The steady thermal stress distributions and effect factors in a ceramic/FGM/metal composite EFBC plate with temperature-dependent material properties during heating process were investigated by the NFEM and the Sinpson method. From numerical calculation,when T0=Ta=300K and Th=1 300K,the stress distributions in the plate were obtained. The results are as follows. With the increase of the FGM layer thickness,the stress distribution in the composite plate is more reasonable. Compared with M=0.1,when M=10,the compressive stress on the ceramic surface increases by 9.0％,and the tensile stress on the metal surface reduces by 17.9％. With the increase of FGM layer porosity,the variations of thermal stress curves become big. Compared with A=O, when A=3.99,the tensile stress on the metal surface increases by 65.5％,and the maximum compressive stress on the surface of ceramics reduces by 27.5％. Compared with the results of constant material properties,when we consider the temperature dependency of the material properties,the maximum tensile stress on the surface of metal in the plate reduces by 30.1％,and the maximum compressive stress on the surface of ceramics in the plate reduces by 9.4g％. Compared with the nongraded two-layered plate, the tensile stress at middle of the graded three-layered composite EFBC plate reduces by 53.5％. When T0=300K,Ta=700K. compared with Tb=1 050K,when Tb=1 800K,the tensile stress on the surface of metal increases 563MPa,and the maximum compressive stress on the surface of ceramics increases 7.24 times.
Ceramic/FGM/metal plate Steady thermal stress NFEM EFBC mechanical boundary
Yangjian Xu Daihui Tu Jianhui Jia
School of Civil Engineering,Hebei University of Engineering,Handan 056038,China School of Science,Hebei University of Engineering,Handan 056038,China
国际会议
Frist Annual Meeting on Testing and Evaluation of Inorganic Materials(第一届全国无机材料测试与评价学术年会)
南昌
英文
231-234
2010-04-28（万方平台首次上网日期，不代表论文的发表时间）