Improvement of interleaving Aramid pulp microfibers on compressive strengths of carbon fiber reinforced polymers with and without impact  

作　　者：Fei CHENG Guangming YANG Yunsen HU Bingyan YUAN Xiaozhi HU 

机构地区：[1]School of Materials Science and Engineering,Southwest University of Science and Technology,Mianyang 621010,China [2]Engineering Research Center of Biomass Materials,Ministry of Education,Southwest University of Science and Technology,Mianyang 621010,China [3]Department of Mechanical Engineering,University of Western Australia,Perth WA6009,Australia

出　　处：《Chinese Journal of Aeronautics》2023年第10期459-470,共12页中国航空学报（英文版）

基　　金：the National Natural Science Foundation of China(No.52102115);the Fundamental Research Funds of Southwestern University of Science and Technology,China(No.20zx7141).

摘　　要：Compressive strengths and elastic moduli of Carbon Fiber Reinforced Polymer(CFRP)composites can be noticeably improved by multiple ultra-thin interlays with non-woven Aramid Pulp(AP)micro/nano-fibers.10-ply CFRP specimens with 0,2,4,6,8 g/m^(2)AP were tested under uniaxial compression.Those flexible AP fibers,filling the resin-rich regions and further constructing the fiber bridging at the ply interfaces,can effectively suppress delamination growth and lead to very good improvements both in the compressive strength and the elastic modulus.The CFRP specimen with an optimum interlay thickness has a distinct shear failure mode instead of the typical delamination cracking along the direction of continuous carbon fibers.Compressive Strengths After Impacts(CAI)of 12.35 J were also measured,up to 90%improvement in CAI has been observed.It is concluded those ultra-thin interlays of non-woven AP micro/nano-fibers are beneficial to design and manufacture“high strength”CFRP composites.

关 键 词：Compressive strength Carbon Fiber Reinforced Polymer(CFRP) Aramid pulp INTERLEAVING Interfacial reinforcing 

分 类 号：TB332[一般工业技术—材料科学与工程]