CFRP层合板的二次低速冲击及剩余压缩强度试验研究  

Experimental Investigation on CFRP Laminates Subjected to Repeated Low-velocity Impact and Compression After Impact

作　　者：王景东 潘静雯[1,2] 张芝芳 江剑[1] 黎健斌 WANG Jingdong;PAN Jingwen;ZHANG Zhifang;JIANG Jian;LI Jianbin(Research Center for Wind Engineering and Engineering Vibration,Guangzhou University,Guangzhou 510006,China;School of Civil Engineering,Guangzhou University,Guangzhou 510006,China)

机构地区：[1]广州大学风工程与工程振动研究中心,广州510006 [2]广州大学土木工程学院,广州510006

出　　处：《材料导报》2023年第12期240-247,共8页Materials Reports

基　　金：广东省自然科学基金(2019A1515011116);高等学校学科创新引智计划(111计划)(D21021);广州市科技计划项目(20212200004)。

摘　　要：以碳纤维增强复合材料(Carbon fiber reinforced polymer,CFRP)层合板为研究对象,在结构的相同位置进行二次低速冲击,考察二次冲击时结构的动力响应和冲击后的剩余压缩强度,并与单次冲击的结果进行对比。在总冲击能量相同的前提下,采用落锤法对CFRP层合板进行冲击试验,得到结构单次和二次冲击的动力响应、能量吸收规律。采用超声波C扫描技术观测CFRP层合板内部的冲击损伤后,对CFRP层合板进行剩余压缩强度试验。系统研究和对比了单次和二次冲击对CFRP层合板在结构动力响应、能量吸收、损伤情况和剩余强度的影响。结果表明:总冲击能量分别为20 J、30 J、40 J时,二次冲击层合板试件吸收的总能量分别是单次冲击的52.50%、67.56%、81.41%,损伤总面积分别是单次冲击的60.58%、64.59%、80.60%;单次冲击后结构的剩余压缩强度分别是二次冲击的76.76%、78.65%、92.40%。此外,CAI-冲击能量、CAI-吸收能量和CAI-损伤面积曲线均在20 J的冲击能量下存在拐点。Taking carbon fiber reinforced polymer(CFRP)laminates as the research object,the repeated low-velocity impact was carried out at the same position of the CFRP laminates.The dynamic response and residual compressive strength of the CFRP laminates were investigated and compared with the results of one-time impact.Applying the same total impact energy for one-time and repeated impact,the impact testing of CFRP laminates was carried out by drop weight method,and the dynamic response and energy absorption law of one-time and repeated impact were obtained.After the impact damage inside the laminates was detected by ultrasonic C-scanning technology,the residual compressive strength testing of CFRP laminates was carried out.In this work,the effects of one-time impact and repeated impact on the structural dynamic re-sponse,energy absorption,induced damage and residual strength of CFRP laminates were systematically studied and compared.The results show that under the same total impact energy of 20 J,30 J and 40 J,the energy absorbed in repeated impact is 52.50%,67.56%and 81.41%of that in one-time impact,respectively,and that the damaged area for repeated impact is 60.58%,64.59%and 80.60%of that in one-time im-pact,respectively,while the residual compressive strength for one-time impact is correspondingly 76.76%,78.65%and 92.40%of that in re-peated impact,respectively.Moreover,the curves of CAI-impact energy,CAI-absorbed energy and CAI-damaged area have the same turning point at the impact energy of 20 J.

关 键 词：纤维增强复合材料 二次低速冲击 剩余压缩强度 动力响应 能量吸收 

分 类 号：TB332[一般工业技术—材料科学与工程]