摘要
本文通过端部切口弯曲试验(ENF)对湿热老化后泡沫复合材料夹芯板Ⅱ型界面剥离进行研究。测定了湿热老化前后玻璃纤维增强复合材料面板、聚氨酯泡沫芯材的抗压强度和压缩模量。结果表明,由于后固化作用,GFRP面板抗压强度、压缩模量先增大后减小;聚氨酯泡沫芯材的抗压强度、压缩模量先减小后趋于稳定。Ⅱ型临界能量释放率(Gc)随着老化时间的增加呈现下降趋势。湿热老化90天后,Gc下降26.68%。
A series of end notched flexure（ENF）tests for foam core composite sandwich structures before and after hygrothermal ageing were done to investigate the effects of hygrothermal ageing on the modeⅡinterfacial delamination.The compressive strength and modulus of glass fiber reinforced polymer（GFRP）laminates and polyurethane foams before and after hydrothermal aging were tested.Results show that the compressive strength and modulus of GFRP laminates increase initially followed by a significant decrease due to the effect of post-curing.In addition,the compressive strength and modulus of polyurethane foam decline sharply and then tend to be stable.In the meantime,the critical energy release rate of the modeⅡinterfacial delamination with different aging time shows a downward trend.The critical strain energy release rate（Gc）declines by 26.68% after hygrothermal ageing of 90 days.
作者
徐丹洋
方园
方海
刘伟庆
赵鹏飞
XU Danyang;FANG Yuan;FANG Hai;LIU Weiqing;ZHAO Pengfei(College of Civil Engineering,Nanjing Tech University,Nanjing 211800,China)
出处
《材料科学与工程学报》
CAS
CSCD
北大核心
2018年第3期487-491,477,共6页
Journal of Materials Science and Engineering
基金
国家自然科学基金资助项目(51408304
51238003)
江苏省科技厅基础研究计划(自然科学基金)青年基金资助项目(BK20140947)
交通运输部建设科技资助项目(2013318798320)
关键词
复合材料夹芯板
界面剥离
抗压强度
能量释放率
湿热老化
composite sandwich structures
interfacial delamination
compressive strength
energy releaserate
hygrothermal ageing
