Effects Of Porosity On The Transient Cooling Heat Stress Of2D-FGM Plate

This paper studied the two-dimensional FGM plate, consisting of Ti-6Al-4V、Al1100and ZrO2, under the four boundaries fixed and different heating ways, heatingto the temperature field of rectangular plates achieve stable. Then the steady statetemperature field as the initial temperature field, apply the cooling temperature on allaround of the plate, calculating out the plane transient stress field of the2D-FGMrectangular plate, according to the results to analysis of the effects of porosity controlparameters on the cooling transient thermal stress.Through analysis, if the upper boundary applied heating temperature Tb1300K,porosity control parametersA yincreased from1.0to3.0, the maximum stress in theplate is reduced by15.7%; IfA xincreased from1.0to3.0, the maximum stress in theplate decreases by4.3%; If the upper and lower boundaries applied heating functionTb1300K、 Ta500K,A yincreased from1.0to3.0, the maximum stress in theplate is reduced by25%, ifA xincreased from1.0to3.0, the maximum stress in theplate decreased from1975.37MPa to1966.58MPa, and no significant decrease; If theupper boundary applied function heating temperature Tb1300K, the remaining threeboundary to be Ta Tc Td500K,A yincreased from1.0to3.0, the maximumstress in the plate is reduced by4%, when Ax=1.0increased to Ax=3.0, the maximumstress of plate decreases from2074.01MPa to2060.92MPa, reduce the amplitude isnot obvious.Therefore, the choice of physical parameters appropriate to the structure of FGMheat conduction and thermal stress has very important effect, especially in aerospaceand other industry which have high demands for precision, selected physicalparameters is reasonable or not, directly related to the success or failure of the project.Finally, we give two simple examples, and calculation of the analytical solution,and the the analytical solution is compared to the numerical solutions which iscomputed by the program, the results showed not much difference between the two, soproved the correctness of the program.