复合材料Nomex蜂窝夹芯结构的平压试验研究  

Experimental Study on Nomex Honeycomb Sandwich Structure Subjected to Out-of-Plane Compression Load

作　　者：刘玥[1] 刘伟[1] 华洲 高维成[1] LIU Yue;LIU Wei;HUA Zhou;GAO Weicheng(School of Astronautics,Harbin Institute of Technology,Harbin 150001,China;Shanghai Electro-Mechanical Engineering Institute,Shanghai 200233,China)

机构地区：[1]哈尔滨工业大学航天学院,哈尔滨150001 [2]上海机电工程研究所,上海200233

出　　处：《航空制造技术》2020年第17期86-91,共6页Aeronautical Manufacturing Technology

基　　金：国家自然科学基金(11772110)。

摘　　要：采用试验方法对不同高度的Nomex蜂窝夹芯结构的后屈曲承载特性及失效机理进行了研究,结合蜂窝夹芯结构的失效过程分析,发现Nomex蜂窝单胞的失稳是由局部屈曲造成的,伴随着整体屈曲而发生的失稳现象。压溃过程是一个非线性的运动过程,蜂窝单胞压溃后的剩余强度体现了蜂窝结构的后屈曲承载能力,Nomex蜂窝的剩余强度约为极限强度的45%~46%。通过吸能性分析发现,蜂窝高度为6mm的夹芯结构能量吸收率高于蜂窝为8mm的夹芯结构,本研究能够为蜂窝夹芯结构的优化设计提供有利依据。In this paper,the post buckling load-bearing characteristics and failure mechanism of Nomex honeycomb sandwich structures with different heights were studied by experimental method.Combined with the failure process analysis of honeycomb sandwich structures,it is found that the collapse of Nomex honeycomb cells is caused by local buckling,accompanied by the instability phenomenon of the whole buckling.The collapse process is a non-linear movement process.The residual strength of honeycomb cells after collapse reflects the post buckling capacity of the honeycomb structure.The residual strength of Nomex honeycomb is about 45%–46%of the ultimate strength.It is found that the energy absorption rate of sandwich structure with honeycomb height of 6mm is higher than that of sandwich structure with honeycomb height of 8mm.This study can provide a good basis for the optimal design of honeycomb sandwich structure.

关 键 词：NOMEX蜂窝 后屈曲承载特性 剩余强度 极限强度 吸能性 

分 类 号：V214.6[航空宇航科学与技术—航空宇航推进理论与工程]