摘要
Low-velocity impact and in-plane axial compression after impact(CAI)behaviors of carbon-aramid/epoxy hybrid braided composite laminates were investigated experimentally.The following three different types of carbon-aramid/epoxy hybrid braided composite laminates were produced and tested:(a)inter-hybrid laminates,(b)sandwich-like inter-hybrid laminates,and(c)unsymmetric-hybrid laminates.At the same time,carbon/epoxy braided composite laminates were used for comparisons.Impact properties and impact resistance were studied.Internal damages and damage mechanisms of laminates were detected by ultrasonic C-scan and B-scan methods.The results show that the ductility index(DI)values of three kinds of hybrid laminates aforementioned are 37%,4%and 120%higher than those of carbon/epoxy laminates,respectively.The peak load of inter-hybrid laminates is higher than that of sandwich-like inter-hybrid laminates and unsymmetric-hybrid laminates.The average damage area and dent depths of inter-hybrid laminates are 64%and 69%smaller than those of carbon/epoxy laminates.Those results show that carbon-aramid/epoxy hybrid braided composite laminates could significantly improve the impact properties and toughness of non-hybrid braided composite laminates.
作者
CAO Hongxue
SUN Ying
TANG Mengyun
DING Xu
CHEN Li
曹洪学;孙颖;唐梦云;丁许;陈利(School of Textile Science and Engineering, Tiangong University, Tianjin 300387, China;Key Laboratory of Advanced Textile Composite Materials of Ministry of Education, Institute of Composite Materials, Tiangong University, Tianjin 300387, China)
基金
National Natural Science Foundation of China(No.11102133)
Tianjin National Natural Science Foundation,China(No.19JCYBJC18300)。
作者简介
Correspondence:SUN Ying,E-mail:sunying@tjpu.edu.cn。
