铝面板厚度对Nomex蜂窝夹层结构冲击后弯曲性能影响的试验研究  

Experimental Study of the Effect of Aluminum Panel Thickness on Flexural Properties of Nomex Honeycomb Sandwich Structure Subjected to Low Velocity Impact

作　　者：管国阳[1] 刘志昌[1] 胡国平[1] 张迎[1] GUAN Guo-yang;LIU Zhi-chang;HU Guoping;ZHANG Ying(Institute of Engineering Mechanics, Nanehang University, Nanehang 330031, China)

机构地区：[1]南昌大学工程力学研究所,南昌330031

出　　处：《实验力学》2017年第4期551-558,共8页Journal of Experimental Mechanics

基　　金："江西省普通本科高校中青年教师发展计划访问学者专项资金"资助

摘　　要：通过低速冲击试验和四点弯曲试验,研究了铝面板厚度对Nomex蜂窝夹层结构抗冲击能力和剩余强度的影响。结果表明:在冲击荷载作用下,面板发生变形的区域大小随面板厚度增加而变大,当面板厚度大于0.5mm时,变形区域直径趋于稳定;无论试件是否受到过冲击,在弯曲载荷作用下,0.2mm厚面板发生芯格内屈曲失稳,而其他厚度面板均发生格间失稳;对无冲击损伤的结构,0.2mm厚面板弯曲强度显著低于其他厚度面板;对含冲击损伤的结构,0.2mm厚面板的剩余强度百分比最高。The influence of aluminum panel thickness on the impact resistance capabilities and residual strength of Nomex honeycomb sandwich structure was studied through low velocity impact experiment and four point bending experiment. Results show that under the action of impact loading, the size of deformed area on panel becomes larger along with the increase of panel thickness, but when panel thickness is larger than 0.5mm, the diameter of deformed area tends to stable; No matter whether the specimen is impacted, under bending load action, panel with 0.2mm thickness failures due to core box buckling instability, but panels with other size thckness failure due to lattice instability; for structure without impact damage, the bending strength of panel with 0.2mm thickness is obvious lower than that of panel with other thickness; for structure with impact damage, the percentage of residual strength of panel with 0.2mm thickness is the highest.

关 键 词：蜂窝夹层结构 低速冲击 面板厚度 屈曲 剩余强度 

分 类 号：TB33[一般工业技术—材料科学与工程]