基于固有型内聚力模型模拟双层夹胶玻璃冲击断裂行为  

Simulation of the Impact Fracture Behavior of Double Laminated Glass Based on Intrinsic Cohesive Model

作　　者：姚蓬飞 韩阳 姚芬 李志强[1,2,3] YAO Pengfei;HAN Yang;YAO Fen;LI Zhiqiang(Institute of Applied Mechanics and Biomedical Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Shanxi Key Laboratory of Material Strength and Structural Impact,Taiyuan University of Technology,Taiyuan 030024,China;Mechanics National Experimental Teaching Demonstration Center,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学应用力学与生物医学工程研究所,山西太原030024 [2]太原理工大学山西省材料强度与结构冲击重点实验室,山西太原030024 [3]力学国家级试验教学示范中心(太原理工大学),山西太原030024

出　　处：《高压物理学报》2019年第6期110-120,共11页Chinese Journal of High Pressure Physics

基　　金：国家自然科学基金(11672199)

摘　　要：为了研究双层夹胶玻璃(LG)在冲击荷载作用下的裂纹扩展规律,采用零厚度固有型内聚力单元裂纹扩展方法建立了球形锤头冲击下两边支撑的LG动力响应的计算模型,内聚力单元使用最大主应力失效准则,探讨玻璃罚刚度K值和厚度对裂纹形成路径、范围和数量以及下面板位移的影响。结果表明:(1)冲击荷载作用下,上玻璃板中心首先产生大量细小裂纹和玻璃颗粒,随后径向裂纹不断向外扩展,同时产生大量环向裂纹;(2)随着玻璃K值的增加,LG裂纹扩展范围缩小、数量减少,下玻璃板中心位移减小;(3)随着玻璃厚度的增大,LG裂纹范围缩小、数量减少,下玻璃板中心位移减小。研究结果为LG抗冲击设计和安全防护提供了直接依据。In order to investigate the crack propagation law of double layered laminated glass(LG)under impact load,a model for calculating the dynamic response of the both sides support LG under the impact of a spherical hammer head is established by using the zero-thickness intrinsic cohesive method.The maximum principal stress failure criterion is applied to the intrinsic cohesive element.The effects of penalty stiffness K and thickness of glass on crack formation path,range and number,as well as the displacement of lower panel were discussed.Simulation results show that:(1)under the impact load,a large number of fine cracks and glass particles are first generated in the center of LG upper glass plate,and then a large number of circumferential cracks are generated in the process of continuous outward propagation of radial cracks;(2)with the increase of the K value of the glass penalty stiffness,the crack growth range and the number of cracks decrease,and the center displacement of the lower glass plate decreases;(3)with the increase of glass thickness,the crack range and number decrease,and the center displacement of the lower glass plate decreases.The results provide a direct basis for LG shock resistant design and safety protection.

关 键 词：冲击荷载 双层夹胶玻璃 裂纹扩展 固有型内聚力单元 罚刚度 

分 类 号：O347.3[理学—固体力学]