汽车夹层风窗玻璃抗冲击破坏机理与吸能特性的研究  

A Research on the Mechanism of Impact Damage Resistance and Energy Absorption Characteristics of Vehicle Laminated Windshield

作　　者：钟渝楷 姚小虎[1] 臧曙光[2] 

机构地区：[1]华南理工大学土木与交通学院,广州510640 [2]中国建筑材料科学研究院,北京100024

出　　处：《汽车工程》2016年第1期102-108,共7页Automotive Engineering

基　　金：国家国际科技合作专项项目(2011DFA53080);国家自然科学基金(11372113);爆炸科学与技术国家重点实验室(北京理工大学)开放课题(KFJJ14-2M)资助

摘　　要：本文建立了汽车风窗玻璃有限元模型,利用非线性动力学有限元软件LS-DYNA求解得到了风窗玻璃典型位置的加速度时程曲线和裂纹扩展模式,并与文献中的实验结果进行了对比,验证了模型的正确性;然后,基于该模型,研究风窗玻璃厚度对最大接触力、冲击块最大位移、头部损伤指标和吸能比率等吸能指标的影响规律。结果表明,汽车风窗玻璃遭受低速冲击时,在风窗玻璃总厚度不变的情况下,适当增加玻璃厚度、减小PVB厚度能起到更好保护乘员安全的效果。In this paper, a finite element model for vehicle windshield is established, with which and by u- sing nonlinear dynamic finite element software LS-DYNA, the time history curve of acceleration at a typical location and the crack propagation patterns of the windshield are obtained and compared with the experimental results in lit- eratures, verifying the correctness of the model. Then based on the model, the law of the influence of windshield thickness on energy absorption indicators, including maximum contact force, maximum displacement of impactor, head injury criteria and energy absorption ratio ere, is investigated. The results show that when vehicle windshield is subjected to low-velocity impact, appropriately increasing glass thickness and reducing PVB thickness with the total thickness of windshield kept unchanged can have a better effect of occupant safety protection.

关 键 词：汽车风窗玻璃 抗冲击 破坏机理 吸能特性 数值模拟 

分 类 号：U463.835[机械工程—车辆工程]