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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 effects of three-dimensional braided basalt fiber bundles on the epoxy resin composites were investigated under the temperature field of 23, 60, 90, 120, 150 and 210 ℃ and in the range of different strain rates (1 300 ~ 1 600, 1 600 ~ 2 000, 2 000 ~ 2 300s-1) in the plane / in-plane impact compression response characteristics. The results show that the characteristics of stress-strain curve that determine the out-of-plane / in-plane impact compression when the test temperature is higher or lower than the glass transition temperature of the resin. Even if the test conditions (temperature and pressure) are the same, - There is also a big difference between strain curves. Temperature and strain rate have different effects on compressive modulus, peak stress, failure strain and specific energy absorption. The failure modes of out-of-plane and in-plane compressions are quite different, which are affected by temperature effect and strain rate effect.