摘要
钢化真空玻璃导热差且具有冷收缩性能,当两侧玻璃温度差异较明显时,在冷收缩作用下,导致钢化真空玻璃弯曲变形,甚至出现真空环境失效,这极大限制了钢化真空玻璃在寒带地区的推广应用。基于此,进行了低温温差下钢化真空玻璃的变形测试和数值模拟,分析了低温温差和不同尺寸比例下,钢化真空玻璃两侧玻璃之间的协同变形规律。结果表明:试验与数值模拟结果相对误差在2%以内,钢化真空玻璃热-力学耦合模型具有可靠性;低温条件下玻璃整体向上弯曲变形,中心点向内凹陷,变形与温差呈正比关系;同一温差下,钢化真空玻璃长边长度相同时,随着长宽比的减小,长边上的最大变形量会增大。能够为钢化真空玻璃在极寒地区的推广应用及生产工艺的改进提供理论依据。
In low-temperature environments,the temperature difference between the two sides of tempered vacuum glass can cause bending,deformation,and even failure.Based on this problem,this study uses a combination of experimental research and numerical analysis to establish a thermo-mechanical model of the tempered vacuum glass in a low-temperature environment,which reveals the mechanism of cooperative deformation process of tempered vacuum glass under temperature variations between the two sides.The results of the numerical simulations are compared with the results of the low-temperature deformation test to verify the credibility of the thermo-mechanical model of the tempered vacuum glass.Simultaneously,this study conducts simulations and analyses on the deformation of tempered vacuum glass of varying sizes under different low-temperature temperature difference situations.The objective is to examine the influence of size and temperature differences on the characteristics of deformation of tempered vacuum glass.The results show that the relative error between the lowtemperature deformation test and the numerical simulation results is within 2%,and the thermomechanical model used for the tempered vacuum glass is considered credible.The deformation of tempered vacuum glass at low temperatures is proportional to the temperature difference.The deformation increases with the size ratio at the same temperature difference;it has some theoretical significance and practical value for the promotion and industrialization of toughened vacuum glass in extremely cold regions.
作者
岳高伟
高若琳
高帅
张红霞
YUE Gaowei;GAO Ruolin;GAO Shuai;ZHANG Hongxia(School of Civil Engineering,Henan Polytechnic University,Jiaozuo 454000,China;Luoyang Landglass Machinery Incorporated Company,Luoyang 471000,China)
出处
《真空科学与技术学报》
CAS
CSCD
北大核心
2024年第1期49-56,共8页
Chinese Journal of Vacuum Science and Technology
基金
河南省科技攻关计划项目(222102320381)
河南省高等学校重点科研项目计划(22A130002)。
关键词
钢化真空玻璃
低温温差
协同变形
尺寸比例
变形特征
Tempered vacuum glass
Low temperature difference
Cooperative deformation
Dimensional ratio
Deformation characteristics
