Bending Properties of UHMWPE Fiber Weft Knitted Composites with Different Structures
Three kinds of weft knitting structure fabrics (weft plain, rib, cardigan) based on ultrahigh molecular weight polyethylene (UHMWPE) as raw materials were knitted by computerized flat knitting machine.Each kind of fabric was laminated from six layers into composite material plates respectively, which is laid up in (0 °, 90 °) 3s by VARTM.The bending performance and the influencing factors of the three kinds of fabrics were studied, which were followed by the comparison and analysis of the stress-deflection curve and the failure mode.The results indicate that the bending stress-deflection curve of three kinds of UHMWPE weft knitting structure composites has nonlinear characteristics and the curves are all similar to a parabola;the bending strength of weft plain knitted fabric laminated plate is the best, rib is the second, cardigan is the last.This shows that the technological parameters of different fabric structures have a great influence on the bending performance of composite materials.The bending failure mainly occurs on the resin matrix, and no fracture, tearing occurs on the reinforcement.This also shows that the reinforcing material made by UHMWPE fiber has strong toughness and high strength.
国家科技期刊平台
NSTL
万方数据
维普
