摘要
为研究玻璃纤维(G)铺层的位置对碳纤维(C)复合板冲击损伤程度的影响,分别在15 J和25 J冲击能量的条件下,采用落锤式冲击试验机对[CC]2s、[CCCG]s、[GCCC]s、[CCGC]s 4种复合材料分别进行冲击实验,得出接触力、能量和位移分别随着时间变化的曲线;然后采用水浸式超声波C扫系统对冲击后的复合板进行损伤检测,得出复合板表面及内部损伤情况。结果表明,在相同能量的冲击下,[GCCC]s复合板接触力增长的速率高于其他3种复合板且接触力峰值较其他的要大;在15 J能量的冲击下,作用在[CC]2s、[CCCG]s、[GCCC]s、[CCGC]s 4种复合材料板的冲头的最大位移相差不大,而在25 J能量冲击下,玻璃纤维在复合板外表面时冲头的位移最小,这说明随着冲击能量的提升玻璃纤维抗冲击性能提升明显;此外,玻璃纤维在表面的复合板的损伤面积要小于其他3种复合板,这说明玻璃纤维的韧性比其他复合板要高,且玻璃纤维的抑制损伤扩散的能力高于碳纤维。
To study the influence of the position of glass fiber(G)layer on the impact damage degree of carbon fiber(C)composite panel,the impact tests were carried out for the[CC]2s,[CCCG]s,[GCCC]s and[CCGC]s composite plates using a drop weight impact test machine under the conditions of 15 J and 25 J impact energy,and the curves of contact force,energy and displacement as a function of time were obtained.A water immersion ultrasonic C⁃scan system was used to inspect the surface and internal damages of the composite plate after the impact tests.The results indicated that under the same energy impact,the growth rate of contact force of the[GCCC]s composite plate was higher than those of the other three types of composite plates,and the peak value of contact force was also larger than those of the other three kinds of composite plate.There was no significant difference between the maximum displacement of punch acting on the[CC]2s,[CCCG]s,[GCCC]s and[CCGC]s composite plates under an impact of 15 J energy.However,the glass fiber appeared on the outer surface of the composite sheet under the 25 J energy impact,and the displacement of the punch was the smallest.This indicated that the impact resistance of glass fiber was improved remarkably with an increase in impact energy.In addition,the damage area of glass fiber on the surface was smaller than those of the other three composite sheets,indicating that the toughness of glass fiber was higher than that of other composite plates due to its better capabili⁃ty to inhibit damage diffusion.
作者
黄志超
骆强
赖家美
刘帅红
HUANG Zhichao;LUO Qiang;LAI Jiamei;LIU Shuaihong(School of Mateitals Science and Engineering,East China Jiaotong University,Nanchang 330013,China;School of Mechanical and Electrical Engineering,Nanchang University,Nanchang 330031,China)
出处
《中国塑料》
CAS
CSCD
北大核心
2021年第6期46-52,共7页
China Plastics
基金
国家自然科学基金(51875201)。
关键词
玻璃纤维
碳纤维
复合
低速冲击
超声波C扫
损伤面积
glass fiber
carbon fiber
composite plate
low⁃velocity impact
ultrasonic C⁃scan
damage area
作者简介
联系人:黄志超(1971-),男,教授,主要从事载运工具强度与可靠性研究、板料连接技术、汽车后桥等研究工作,hzc@ecjtu.edu.cn。
