摘要
采用改进锁式缝合和真空辅助树脂注射(VARI)成型工艺制备不同缝合密度的碳纤维/环氧树脂复合材料,研究缝合行距和缝合针距对复合材料力学性能的影响,得出最佳缝合密度。结果表明:随着缝合行距的增大,拉伸性能和弯曲性能均有所提升,层间剪切强度先增大后减小;随着缝合针距的增大,拉伸性能和弯曲性能均有提高的趋势;当缝合密度为5 mm×8 mm时,缝合复合材料具有最佳的综合力学性能,与未缝合复合材料相比,拉伸强度和模量分别下降了13.3%和12.7%,弯曲强度和模量分别下降了23.0%和25.2%,层间剪切强度提高了11.3%。
The carbon fiber/epoxy resin composites with different stitch density were manufactured using modified lock stitching and vacuum assisted resin infusion(VARI)molding process.The influence of stitch space and stitch pitch on mechanical properties of the composites was investigated.The optimum stitch density was obtained.The results show that with increasing stitch space,both tensile and flexural properties enhance and interlaminar shear strength increases first and then decreases.With the increase of stitch pitch,both tensile and flexural properties exhibit an increasing trend.The stitched composites have the optimum integrated mechanical properties when the stitch density is 5 mm×8 mm.Their tensile strength,tensile modulus,flexural strength and flexural modulus reduce by 13.3%,12.7%,23.0%and 25.2%,respectively,whereas the interlaminar shear strength increases by 11.3%compared to the unstitched composites.
作者
徐学宏
郑义珠
陈吉平
宁博
XU Xue-hong;ZHENG Yi-zhu;CHEN Ji-ping;NING Bo(Shanghai Aircraft Manufacturing Co.,Ltd.,Shanghai 201324,China)
出处
《材料工程》
EI
CAS
CSCD
北大核心
2020年第10期68-73,共6页
Journal of Materials Engineering
基金
上海飞机制造有限公司创新基金(F-CXKT-0158)
中国商飞公司科技创新专项(Y18GS08)。
关键词
缝合
复合材料
真空辅助树脂注射
力学性能
stitching
composite
vacuum assisted resin infusion
mechanical property
作者简介
通讯作者:徐学宏(1988-),男,工程师,博士,研究方向为复合材料预成型体制备以及液体成型工艺,联系地址:上海市浦东新区上飞路919号上海飞机制造有限公司(201324),E-mail:xuxuehong@comac.cc。
