Effects Of Component, Heating Time And Temperature On The Thermal Stress Of 2D-FGM Plate

Heat resistant FGM is a kind of functional gradient material used in high temperature environment, which is used in nuclear reactor, aerospace, internal combustion engine and gas engine, high temperature engine and so on. Due to the high temperature of the working environment of the heat resistant FGM, the temperature difference is very large, so it is very important to analyze the thermal conduction and thermal stress of the material composition structure.In this paper, we first establish a research model of 2D-FGM board. Secondly, the boundary conditions and basic equations are brought into. Finally, the weighted residual method is used to obtain the variational equation. In the space domain, the finite element method is adopted, and the finite difference method is adopted in the time domain. The interpolation function is used to show the temperature and the displacement, and the finite element method is used to get the heat elasticity problem. The calculation program is programmed by FORTRAN77 software. By numerical calculation and analysis, the distribution law of thermal stress and the factors affecting the thermal distribution of FGM in the two-dimensional FGM metal / metal / ceramic plane under the condition of the first kind of heat transfer boundary are studied.Draw the following conclusion: whether it is in a separate heating boundary, or boundary conditions are heated at the same time, even four side boundary condition of heating in the functionally graded material plate heat stress is compressive stress. No matter is to change the component coefficient, or change the heating time, heating temperature or change function. Effect of minimum compressive stress is almost always very small, minimum stress has been maintained at-40 MPa to-50 MPa. The influence of the change of the component on the maximum heating thermal stress is negligible. The greatest influence on the maximum heating thermal stress is the component. Effect of heating temperature and the heating function on the boundary on the maximum thermal stress is also not very significant. Should be the heating time only on the thermal boundary condition of heating heat effect is very obvious, in the upper and lower sides of the heating on the maximum heating should influence is not very obvious, in four boundaries are heating the heating time of heating of the maximum heat should force effect is almost negligible.