三维正交机织玄武岩/环氧树脂复合材料高温老化后低速冲击性质

研究了三维正交机织玄武岩/环氧树脂复合材料在180℃高温环境下老化不同时间后的低速冲击力学性能,测试得到了不同老化时间的试样在低速冲击过程中的载荷-位移曲线。研究发现:随着老化时间增加,三维正交机织玄武岩/环氧树脂复合材料能承受的最大载荷下降,位移逐渐增加,载荷-位移曲线斜率逐渐下降;随着冲击能量增加,老化条件相同的三维正交机织玄武岩/环氧树脂复合材料试样最大承受载荷增大,位移和曲线斜率增加。对高温老化后三维正交机织玄武岩/环氧树脂复合材料试样进行SEM观察,发现纤维与树脂基体脱粘有裂纹产生,且裂纹数目和面积随着老化时间延长而增加。 

Low velocity impact behaviors of 3D orthogonal woven basalt/epoxy composites after high-temperature aging

We presents the low velocity impact mechanical behaviors of 3D orthogonal woven basalt/epoxy woven composites after exposure to 180℃ high temperature environment for different aging time. The load-displacement curves of specimens in process of low velocity impact for different aging time have been obtained. The research indicates that the peak load and the slope of load-displacement curves of 3D orthogonal woven basalt/epoxy composites monotonically decrease with the increase of aging time, while the deflection gradually increases. While with the increasing of impact energy, the peak load, the deflection and the slope of curves for 3D orthogonal woven basalt/epoxy composite specimens with the same aging condition also raise. The SEM observations for the high temperature aged 3D orthogonal woven basalt/epoxy composite specimens indicate the presence of fiber/resin matrix debonding crack, the amount and size of crack increase with increasing aging time.