In order to study the stress variation characteristics of porous bi-directional functionally graded plate under thermal loading,the analytical solutions of the plane temperature field and the stress field are obtained by using the fixed solution conditions and the basic laws of heat transfer,the stress field of the model is solved by using the analytical solution method.The effect of the heating time,porosity control parameter Axalong the length direction of the plate,porosity control parameter Ayalong the plate thickness direction,and four types of boundary heating functions on the thermal stress distribution of the porous bi-directional functionally graded plate were analyzed by using a numerical example.The results show that the thermal stress field in the plate is asymmetrically distributed,the maximum compressive stress is accumulated at the upper boundary,and the minimum compressive stress is accumulated in the lower right area;the porosity control parameter Axdoesn′t change with the coordinate position of the maximum and minimum thermal stress in the plate;the changes in heating time and porosity control parameter Ayalong the plate thickness direction lead to great changes in thermal stress contour in the plate,while the porosity control parameter Axand the type of the upper boundary heating function have less effect.
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