摘要
研究了三维编织玄武岩长丝纤维束增强环氧树脂复合材料在23、60、90、120、150、210℃温度场下和不同应变率范围(1 300~1 600、1 600~2 000、2 000~2 300s-1)内的面外/面内冲击压缩响应特征。结果表明:试验温度高于或低于树脂玻璃化温度决定面外/面内冲击压缩的应力-应变曲线走势特征,即使试验条件(温度和气压)一致,面外冲击压缩与面内冲击压缩应力-应变曲线也存在较大差异。温度和应变率对压缩模量、峰值应力、破坏应变、比能量吸收均有不同程度影响。面外和面内压缩的破坏模式存在较大差异,受温度效应和应变率效应影响。
The out-of-plane/in-plane impact compression response characteristics of 3-D braided basalt filament fiber reinforced epoxy composites under the temperature field of 23,60,90,120,150,210 ℃ and different strainrates(1 300-1 600,1 600-2 000,2 000-2 300s-1)were investigated.The results indicate that the stress-strain curve movement characteristics of out-of-plane/in-plane impact compression depend on whether the test temperatures are above or below the Tgof epoxy.Even though under the same test condition(temperature and gas pressure),there is still great difference between stress-strain curves of out-plane impact compression and in-plane impact compression.Temperature and strain rate have influence on compression modulus,peak stress,failure strain and specific energy absorption at different levels.The failure modes,affected by temperature and strain rate,differ in outplane compression and in-plane compression.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2015年第2期395-402,共8页
Acta Materiae Compositae Sinica
基金
中央高校基本科研专项基金(CUSF-DH-D-2014002)
上海市科学技术委员会项目(12521102400)
关键词
三维编织复合材料
温度场
高应变率
冲击
压缩
3-D braided composites
temperature field
high strain rate
impact
compression
