采用人工加速老化的方法模拟湿热环境,通过泡桐木玻璃纤维增强复合材料夹芯结构的双悬臂梁拉伸剥离试验,研究湿热环境对玻璃纤维增强复合材料(GFRP)面板和泡桐木芯材的粘结性能的影响.试验结果表明,90d湿热加速老化后泡桐木复合材料夹芯结构的能量释放率下降了32.3％,芯材泡桐木顺纹抗拉强度下降了11.6％,GFRP面板拉伸模量下降了11.0％.
The way of artificial accelerated aging to simulate hygrothermal environment was used to investigate the effect of the bonding property of GFRP and paulownia wood in the environment.And, the DCB method was used to test the interfacial properties of the GFRP paulownia sandwich structure.Based on the energy release rates from the test data, the effect of the hygrothermal environment to the interface toughness of the GFRP paulownia sandwich structure was analyzed.Moreover, the tensile property change of paulownia and GFRP in the hygrothermal environment was studied.It was concluded that after 90 days hygrothermal aging, the energy release rate of the paulownia GFRP sandwich composite structures was declined by 32.3％, and the tensile strength of the paulownia cores was decreased by 11.6％.Meanwhile, the tensile modulus of GFRP laminates was reduced by 11.0％.
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