Application of Finite Element Method of Composite Wall Insulation System

In this paper, the thermal stress characteristics of polystyrene plate - thin plaster wall are present. A three-dimensional element is selected to mesh the wall model, which can simulate the coupling effects of thermal stress and structural stress field. Thermal stress and deformation distribution are proposed after comparing and analyzing the two simulation results. Numerical simulation results indicate that: (1) Polystyrene plates thin plaster wall insulation system has very good thermal insulation properties；(2) Different stress fields concentrate significantly around windows and in the middle of wall especially around the windows. (3) The deformation of the polystyrene plate - thin plaster wall insulation system reach the maximum at the edge of the wall while the minimum in central.