Numerical Simulation for the Thermal Stress of Composite Wall Insulation System

Abstract

This paper presents the thermal stress characteristics of polystyrene plate - thin plaster wall. Based on thermal stress analysis module of ANSYS software, a three-dimensional element solid5 is selected to mesh the wall model, which can simulate the coupling effects of thermal stress and structural stress field. The critical temperature of hot and cold cycles is taken as the critical temperature condition, which is imposed on the calculation model. Windowless Wall and window wall were modeled separately. Temperature field, thermal stress, and deformation distribution were proposed after comparing and analyzing the two simulation results. Numerical simulation results indicate that: (1) Whether in high or low temperatures, window or windowless, polystyrene plates thin plaster wall insulation system has very good thermal insulation properties；(2) Polystyrene plate - thin plaster wall insulation system is influenced by the temperature stress. Different stress fields concentrate significantly around windows and in the middle of wall especially around the windows. In fact, it is relatively same as the law of cracks around the windows.

Thermal and Drying Cyclic Loading for Cement Based Mortars and Expanded Polystyrene Foam Layers

“…A cement based mortar and a polymeric insulating material were chosen to be tested [1][2][3][4][5][6][7][8]. Expanded polystyrene, known under the abbreviation EPS, is the most commonly used insulating material.…”

Research on thermal performance of external thermal insulation composite concrete wall block

“…Technical transformation of external walls includes external/internal insulation upgrading and self-insulation technology of external walls. The external thermal insulation technology of the external wall is mainly used for the transformation of the old buildings, the air tightness and waterproof property of the wall body after the transformation are remarkably increased, but the durability and fire resistance are poorer [8][9][10]; The internal thermal insulation technology of the external wall is simple in construction and low in cost, but affects indoor decoration and occupies indoor usable floor area [11,12]; the self-insulation technology of external wall has better durability and fire resistance, but the heat bridge effect cannot be avoided [13,14]. On the basis of the above-mentioned traditional technologies, the researchers added fiber, fly ash, aerated concrete and so on to the concrete, which have improved the thermal performance of the building wall [15][16][17][18][19]; in recent years, new composite thermal insulation concrete walls (crosshole block concrete walls, composite ceramsite concrete walls, and hollow block concrete walls) have been widely used in various types of buildings [20,21], improving the thermal property of building walls to varying extent [22,23].…”