内外片温差作用下真空玻璃应力与变形分析

发布时间：2018-02-14 06:51

本文关键词： 真空玻璃温差作用应力和变形热炸裂　出处：《硅酸盐通报》2017年09期 　论文类型：期刊论文

【摘要】：内外片温差导致的真空玻璃应力和变形是真空玻璃破裂重要因素之一。基于理论和ANSYS热结构直接耦合数值模拟分析,计算了内外片温差作用下的真空玻璃应力和变形,分析了温差作用下影响真空玻璃破裂因素。结果表明,当真空玻璃内外片存在温差时,真空玻璃产生的球面弯曲曲率半径与玻璃基片的厚度成正比,与玻璃基片的线膨胀系数及内外片温差成反比,与真空玻璃的长、宽尺寸无关;温差作用下导致的真空玻璃球面弯曲挠度及边缘弯曲挠度与真空玻璃长、宽尺寸及弯曲半径成正比,最大边缘弯曲挠度发生在长边中点处;温差作用下真空玻璃的最大拉应力与真空玻璃的基片厚度及长宽尺寸均无关,说明无论真空玻璃尺寸大小如何,均有可能会因温差作用产生破裂;真空玻璃应用过程中,因装配约束作用,增大了温差作用下的真空玻璃边缘拉应力,且最大拉应力分布在边角部位,从而造成了真空玻璃在接近于边角处破裂。
[Abstract]:The stress and deformation of vacuum glass caused by temperature difference between inner and outer plates are one of the important factors of vacuum glass rupture. Based on the direct coupling numerical simulation analysis of ANSYS thermal structure, the stress and deformation of vacuum glass under the action of inner and outer plate temperature difference are calculated. The effect of temperature difference on the rupture of vacuum glass is analyzed. The results show that the curvature radius of spherical surface produced by vacuum glass is proportional to the thickness of glass substrate when there is temperature difference between the inside and outside of vacuum glass. It is inversely proportional to the linear expansion coefficient of the glass substrate and the temperature difference between the inner and outer plates, and has nothing to do with the length and width of the vacuum glass; the spherical bending deflection and the edge bending deflection of the vacuum glass caused by the temperature difference are related to the length of the vacuum glass. The maximum bending deflection of the edge occurs at the middle point of the long side, and the maximum tensile stress of the vacuum glass under the action of temperature difference is independent of the thickness of the substrate and the length and width of the vacuum glass. The results show that no matter what the size of vacuum glass is, it is possible for the vacuum glass to break due to the effect of temperature difference, and during the application of vacuum glass, the edge tensile stress of vacuum glass under the action of temperature difference is increased because of assembly constraint. The maximum tensile stress is distributed in the corner, which leads to the rupture of the vacuum glass near the edge corner.
【作者单位】：国家玻璃器皿产品质量监督检验中心;北京新立基真空玻璃技术有限公司;中国建材检验认证集团股份有限公司;
【基金】：国家自然科学基金(51172221,51472227) 科技部重大仪器专项项目(2011YQ140145) 国家高技术研究发展计划(863计划)(2015AA034204)
【分类号】：TQ171.1

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