含脱层损伤复合材料层合梁冲击动力响应实验研究  

An Experimental Study on Dynamic Response for Delaminated Composite Beams Subjected to Axial Impact

作　　者：蔡忠云[1] 唐文勇[1] 赵永刚[2] 韩志军[2] 梁卫民[2] 张圣坤[1] 

机构地区：[1]上海交通大学海洋工程国家重点实验室,上海200030 [2]太原理工大学应用力学研究所,山西030024

出　　处：《实验力学》2007年第2期111-118,共8页Journal of Experimental Mechanics

基　　金：国家自然科学基金资助项目(10202013);上海市高校优秀青年教师后备人选项目资助

摘　　要：对纤维增强复合材料层合梁在受轴向冲击时的动力响应问题进行了实验研究。实验以单向玻璃纤维布和环氧树脂材料制作试件,在层间预埋薄铜箔模拟脱层损伤。采用激光测速仪测量子弹速度,动态应变仪和TDS420A数字示波器记录应变时程曲线进行动力响应分析。实验结果表明铺层角度是决定材料性能的主要原因,脱层损伤的存在及大小对动力响应和发生动力屈曲有重要影响。此外,初始缺陷的影响也是不可忽视的重要因素。An experimental study on dynamic pulse response behavior of fiber reinforced plastic （FRP） beams with delaminations subjected to axial impact by moving mass is presented. The specimens were manufactured by unidirectional E-glass fiber fabric and epoxy resin with [0°], [45°] and [90°] ply sequences and different initial imperfections. The delamination of beam was simulated by copper foils between designed plies. The data of bullet velocities and time history curves of strain were recorded respectively by laser setup, high dynamic strain indicator and TDS420A oscilloscope. The experimental results show that the ply sequences play a significant role in laminated composite material properties and delaminations have a significantly effect on dynamic pulse response of laminated beams. Moreover the initial imperfection is another important factor that cafft be neglected.

关 键 词：复合材料 层合梁 动力响应 脱层 

分 类 号：O347[理学—固体力学]