Low-Velocity Impact and Compression after Impact(CAI)Behaviors of Carbon-Aramid/Epoxy 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)

机构地区：[1]School of Textile Science and Engineering,Tiangong University,Tianjin 300387,China [2]Key Laboratory of Advanced Textile Composite Materials of Ministry of Education,Institute of Composite Materials,Tiangong University,Tianjin 300387,China

出　　处：《Journal of Donghua University(English Edition)》2020年第1期17-27,共11页东华大学学报（英文版）

基　　金：National Natural Science Foundation of China(No.11102133);Tianjin National Natural Science Foundation,China(No.19JCYBJC18300)。

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.

关 键 词：COMPOSITE braided COMPOSITE carbon/epoxy carbon-aramid/epoxy hybrid laminated COMPOSITE low-velocity IMPACT in-plane axial compression compression after impact(CAI) 

分 类 号：TB332[一般工业技术—材料科学与工程]