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主要讨论了有机玻璃板和环氧树脂板两种单一材料在低速冲击下的应力波的传递特征。通过测试传感器位置的第一次达到的峰值及最大峰值、峰值到达时间及各位置的时间差,针对数据分析出单一材料应力波的传递规律,为研究防护低速冲击提供理论依据。结果表明:应力波在环氧树脂板的表面传递速度要小于应力波在板内部的传递速度;应力波衰减的速度从大到小排列分别是:环氧树脂叠层、有机玻璃叠层、环氧树脂厚板、有机玻璃厚板;环氧树脂板纵波传递比有机玻璃板的纵波传递速度快,环氧树脂板应力波在纤维方向上的传递速度比纤维排列45°快。
The stress wave propagation characteristics of two kinds of single materials of plexiglass plate and epoxy resin plate under low speed impact are mainly discussed. By testing the first peak position and maximum peak value, peak arrival time and the time difference of each position of the sensor, the transmission law of single material stress wave is analyzed for the data, which provides a theoretical basis for the study of low velocity impact protection. The results show that the transmission speed of stress wave on the surface of epoxy resin plate is less than the transmission speed of stress wave in the plate. The descending speed of stress wave is as follows: epoxy resin laminate, plexiglass laminate, Oxygen resin plate, plexiglass thick plate; the longitudinal wave transmission of the epoxy resin plate is faster than the longitudinal wave transmission of the plexiglass plate, the transmission speed of the epoxy resin plate stress wave in the fiber direction is faster than that of the fiber arrangement 45 °.