空爆载荷下不同芯材夹层结构的变形和破坏  

The Deformation and Failure of Sandwich Structures with Different Core Materials under Air-blast Loading

作　　者：周平 孙锋山 谈敦铭 刘保军 ZHOU Ping;SUN Feng-shan;TAN Dun-ming;LIU Bao-jun(Aviation Maintenance NCO Academy,Air Force Engineering University,Xinyang Henan 464000,China)

机构地区：[1]空军工程大学航空机务士官学校,河南信阳464000

出　　处：《机电产品开发与创新》2024年第5期93-96,共4页Development & Innovation of Machinery & Electrical Products

摘　　要：通过动力显式有限元方法,对不同芯材(铝蜂窝、泡沫铝和无芯材)夹层结构在空爆载荷下的变形和破坏特性进行了对比研究。在相同装药类型及装药量、不同炸距的情况下,考察不同夹层结构的变形过程和变形量,分析失效破坏模式,并对比研究吸能特性。结果表明:不同炸距下,泡沫铝夹层结构变形破坏程度最小、吸能特性最好,是抗爆性能最优的夹层结构,铝蜂窝夹层结构次之;夹层结构的变形破坏程度随炸距的减小而明显增大,破坏形式由弯曲发展到脱层甚至破碎。Based on the dynamic explicit finite element method,the deformation and failure characteristics of sandwich structures with different core materials(aluminum honeycomb,foam aluminum,without core material)under air-blast loading were compared.Under the same charge type,charge amount,and different detonation distances,the deformation process and amount of different sandwich structures were investigated,the failure and failure modes were analyzed,the energy absorption characteristics were compared.The results show that the foam aluminum sandwich structure has the smallest deformation and damage degree,the best energy absorption characteristics,and is the structure with best anti-explosion performance,followed by the aluminum honeycomb sandwich structure under different detonation distances;The degree of deformation and failure of sandwich structures increases significantly with the decrease of blast distance,and the failure mode develops from bending to delamination or even fracture.

关 键 词：空爆载荷 芯材 夹层结构 炸距 破坏 有限元法 

分 类 号：TB330.1[一般工业技术—材料科学与工程]