关键词: 真空玻璃;温差作用;应力和变形;热炸裂

Abstract: Stress and deformation ( SD) of vacuum glazing with the action of temperature difference ( TD) between inner and outer glass is one of the significant factors causing the breakage of vacuum glazing . The SD of vacuum glazing was calculated and the effect of TD on the breakage was analyzed based the theoretical analysis and FEM analysis .The results show that the spherical curvature radius of vacuum glazing is proportional to the thickness of glass and inversely proportional to linear expansion coefficient and TD of the glass , but have no relation with the length and width of glass .The bending deflection of the spherical surface and edge is proportional to the length , width and curvature radius of vacuum glazing , and the bending deflection at the midpoint of long edge is the maximum .The maximum tensile stress of vacuum glazing is independent of the thickness , length and width of glass , that is, the glazing could be broken on the effect of TD regardless of its size .Moreover , the constraints in assembly would lead to the increase of edge tensile stress and its maximum is mainly distributed in edge area , so the breakage of vacuum glazing occur in the corners of glass .

Key words: vacuum glazing;effect of temperature difference;stress and deformation;thermal breakage