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采用自制的复合材料动态低温拉伸实验装置,研究了玻璃布-环氧层板(GFRP)在0℃、-30℃低温环境下的冲击拉伸力学性能,获得了GFRP材料的动静态拉伸力学性能参数。实验结果表明:在10-5/s到1/s应变率范围和低温条件下,GFRP材料具有明显的应变率效应和温度效应。在低温环境下,当应变速率提高时,拉伸强度明显增大;和室温情形相比,在低温环境下,GFRP材料的拉伸强度有所提高。实验发现,在低温环境下GFRP材料具有动态韧性。还探讨了复合材料拉伸试样设计的一些主要问题。
The dynamic mechanical tensile test of GFRP at low temperature of 0 ℃ and -30 ℃ was carried out by using the self-made dynamic low temperature tensile testing device of composite material. The dynamic and static tensile properties of GFRP Mechanical properties parameters. The experimental results show that GFRP has obvious strain rate and temperature effects at the strain rate range of 10-5 / s to 1 / s and at low temperature. At low temperature, the tensile strength increases obviously when the strain rate increases. Compared with the room temperature, the tensile strength of GFRP material increases at low temperature. The experiment found that GFRP material has dynamic toughness under low temperature. Some main problems in the design of composite tensile specimens were also discussed.