摘要
针对PMI泡沫/环氧碳纤维夹层结构复合材料的热压罐胶接成型工艺,系统研究了不同密度的PMI泡沫在0.2 MPa与0.3 MPa下的热稳定性能、蠕变性能。同时分别考察了不同厚度、不同处理条件的PMI泡沫在热压罐中的压缩变形情况,总结了压力对泡沫的尺寸稳定性的影响规律。通过研究PMI泡沫/环氧碳纤维夹层结构复合材料的力学性能,比较了不同固化压力下PMI泡沫与碳纤维面板胶接质量。结果表明,密度大的泡沫的抗蠕变性能好。泡沫的高温蠕变性能受压力影响敏感,随着压力增大,变形量迅速增大。经130℃热处理2 h后PMI泡沫的抗蠕变性有所提高。采用0.2 MPa与0.3 MPa胶接的PMI泡沫/高温固化环氧碳纤维阶层结构的抗滚筒剥离强度差别较大。抗剪切强度、抗平面拉伸强度及抗弯曲强度无明显差别。
With the propose of further understand the autoclave manufacturing technology of Polymethacrylimide（PMI） foams/high temperature cured carbon fiber sandwich composites structure,the thermal stability,creep deforming properties of PMI foams with different density under manufacturing pressure of 0.2 and 0.3 MPa has been studied.The effect of manufacturing pressure on dimension stability of the PMI foams also has been investigated via testing the deformation of the core materials with different thickness and different treatment process,which under the high pressure in autoclave.The bonding quality of PMI foams/carbon fiber sandwich composites which manufactured by 0.2 and 0.3 MPa respectively has been evaluated by comparing mechanical properties of their corresponding standard samples of sandwich composites.The research results indicated that the PMI foam with high density exhibited better creep resistance,and the creep resistance was sensitive to the manufacturing pressures,higher pressure leads to higher creep ratio,and the creep resistance can be enhanced by treatment in 130℃ for 2 hours.Climbing drum peel strength of sandwich sample from 0.3 MPa processing is higher than 0.2 MPa. There is no significant difference in shear strength,plane tensile strength and flexural strength testing.
出处
《高科技纤维与应用》
CAS
2012年第1期14-21,共8页
Hi-Tech Fiber and Application
关键词
聚甲基丙烯酰亚胺泡沫
碳纤维夹层结构
固化压力
胶接性能
试验
polymethacrylimide foams
carbon fiber reinforced composite structure
cured pressure
bonding properties
test
