夹层玻璃在外部刚体冲击下的破坏机理试验研究

Experimental Study on Failure Mechanism of Laminated Glass Under Impact of External Rigid Objects

由于具有良好的抗冲击性以及能够在一定程度上避免因破碎而带来的人身伤害事故,夹层玻璃已经广泛应用在工程装饰、户外装饰和家居装饰等领域。最近几年,时常有因高空玻璃因破碎而跌落导致行人伤亡的事故发生。因此,提高玻璃抗冲击能力成为了夹层玻璃设计中的一个不容忽略的环节。在玻璃服役期间,对其冲击作用可能由多种原因产生,如物体坠落到玻璃地板上、家具角撞击玻璃墙体或风致碎片撞击玻璃屋顶等,这些冲击可根据冲击物的特性分为柔体和刚体冲击。冲击行为复杂多变,即使确定了标准的测试方法也很难估算未测试玻璃的冲击强度,还会产生巨大的资源和时间成本。所以提供一套能考虑所有影响因素的通用预测方法显得极为重要,但科学界对于夹层玻璃在受到动态冲撞时的破坏机理和力学性能的分析仍有所欠缺。本文旨在研究夹层玻璃在承受硬物造成的低速冲击下的破坏机理,并建立新的夹层玻璃冲击有限元分析模型。

Because of its good impact resistance and the avoidance of personal injury caused by breakage to a certain extent,laminated glass has been widely applied in engineering decoration,outdoor decoration and home decoration. In recent years,there have been frequent accidents caused by the breakage of high altitude glass caused by breakage. Therefore,improving the impact resistance of glass has become a key link in the design of laminated glass. During the service period of glass,its impact may be caused by many reasons, such as falling objects onto the glass floor, furniture corner hitting glass wall, or windblown debris hitting the glass roof,etc. these shocks can be divided into flexible body and rigid body impact according to the characteristics of the impact material. It is difficult to estimate the impact strength of untested glass even though the impact test is complex. Even if the standard test method is determined,it will cause huge resource and time cost. Therefore,it is extremely important to provide a general prediction method that can consider all the factors. However,the analysis of failure mechanism and mechanical properties of laminated glass under dynamic impact is still lacking. The purpose of this paper is to study the failure mechanism of laminated glass under the low velocity impact caused by hard objects,and to establish a new finite element analysis model for laminated glass.