泡沫填充碳纤维增强复合材料方形蜂窝夹芯准静态压缩特性  

QUASI-STATIC COMPRESSIVE PROPERTIES OF CARBON FIBER REINFORCED COMPOSITE SQUARE HONEYCOMB CORE WITH FOAM FILLERS

作　　者：周昊 郭锐[2] 姜炜[1] ZHOU Hao;GUO Rui;JIANG Wei(National Special Superfine Powder Engineering Research Center,Nanjing University of Science and Technology,Nanjing 210094,China;School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]南京理工大学国家特种超细粉体工程技术研究中心,南京210094 [2]南京理工大学机械工程学院,南京210094

出　　处：《工程力学》2024年第7期249-256,共8页Engineering Mechanics

基　　金：国家自然科学基金项目(12102199)。

摘　　要：提出了一种碳纤维增强复合材料(CFRP)方形蜂窝中内嵌聚甲基丙烯酰亚胺(PMI)泡沫材料的新型轻质夹芯结构并实现了夹芯结构的制备。通过准静态压缩试验和数值模拟研究了不同几何参数夹芯的准静态压缩性能,结果表明:当夹芯栅格间距较小时,夹芯中方形蜂窝的破坏模式主要为脆性断裂破坏,随着栅格间距的不断增大,夹芯结构稳定性逐渐降低,因此夹芯失效模式转变为屈曲失稳。内嵌PMI泡沫后,方形蜂窝夹芯的压缩特性得到了显著改善,其压缩强度增大,能量吸收效率提高;随着内嵌泡沫密度的增大,夹芯的压缩强度和比能量吸收量均呈现出增大的趋势。研究结果可以为抗冲击类夹层结构夹芯的创新性设计提供思路和参考。A novel sandwich core structure comprised of square carbon fiber reinforced composite(CFRP)square honeycomb and polymethacrylimide(PMI)foam fillers was proposed.Quasi-static compression tests on the novel core structures with different geometrical configurations were conducted.The results show that when the spacing between honeycomb walls was small,the failure mode of the square honeycomb was mainly brittle fracture.With the increase of the spacing between honeycomb walls,the stability of the core reduced and the square honeycomb presented a failure mode of buckling.The PMI foam fillers can significantly improve the compressive properties of the CFRP square honeycomb by increasing the compressive strength and specific energy absorption.With the increase of the foam density,both the compressive strength and specific energy absorption of the core show an increasing trend.The research can provide reference on the design of sandwich core structures for impact resistance.

关 键 词：碳纤维增强复合材料 方形蜂窝 内嵌泡沫 准静态压缩 能量吸收 

分 类 号：TB332[一般工业技术—材料科学与工程]