摘要
采用真空辅助树脂传递模塑(VARTM)工艺制备了不同铺层方式的碳纤维增强聚合物基复合材料(CFRP):环氧树脂/碳纤维(EP/CF)和环氧树脂/碳纤维/玻璃纤维毡(EP/CF/GF)复合材料,重点研究了不同铺层纤维体系的CFRP渗透率以及电泳烘烤前后的力学性能变化,探究了其失效机理.结果表明,[±45 °]铺层方式有利于体系中树脂的浸润,且加入GF能够明显提高体系的渗透率;电泳烘烤后,CF[0/90 °]、CF[±45 °]和CF/GF[±45 °]的拉伸强度分别下降了 15.65％、12.05％和6.77％,模量分别下降了 9.08％、16.39％和 10.04％,而CF/GF[0/90 °]的拉伸强度和模量则分别提高了 7.74％和6.95％;在弯曲性能方面,电泳烘烤后CF[0/90 °]、CF/GF[0/90 °]、CF[±45 °]和CF/GF[±45°]的弯曲强度分别下降了 7.62％、8.23％、15.89％和48.39％,模量分别降低了9.23％、3.69％、17.85％和34.38％;而电泳烘烤对4种材料的压缩性能影响较小;电泳后,CF[0/90°]和CF[±45 °]的储能模量、损耗模量均有一定幅度提高,CF/GF[0/90 °]和CF/GF[±45 °]的储能模量、损耗模量均有下降.
Abstract
A series of CFRP with different laminating modes was prepared through VARTM,which included the EP/CF and EP/CF/GF composites.Their mechanical properties before and after electrophoretic baking were compared,and their failure mechanism was explored.The results indicated that the[±45 °]laminating method and the addition of GF mat increased the permeability of the composite system significantly.After electrophoretic baking,the tensile strength of the CF[0/90 °],CF[±45 °],and CF/GF[±45 °]composites decreased by 15.65％,12.05％,and 6.77％,respec-tively,and their modulus decreased by 9.08％,16.39％,and 10.04％,respectively.The tensile strength and modu-lus of the CF/GF[0/90 °]composite increased by 7.74％and 6.95％,respectively.According to the flexural perfor-mance after electrophoretic baking,the flexural strength of the CF[0/90 °],CF/GF[0/90°],CF[±45 °],and CF/GF[±45 °]composites decreased by 7.62％,8.23％,15.89％,and 48.39％,respectively,and their modulus de-creased by 9.23％,3.69％,17.85％,and 34.38％,respectively.There was little effect of electrophoretic baking on the compression performance of these four composite systems.After electrophoretic baking,the energy storage modulus and loss modulus of the CF[0/90 °]and CF[±45 °]composites increased,whereas the CF/GF[0/90 °]and CF/GF[±45 °]composites showed a decrease in these two moduli.
基金项目
深圳市科技计划(CJGJZD20210408092602006)
河南省科技重大专项(221100240400)
维普
万方数据