孔柱锥度对纤维柱增强夹芯结构压缩性能的影响  

Effect of pore-column taper on the.compression properties of fibre-column reinforced sandwich structures

作　　者：李红军 韩杨 宋笑非 郑绍文[5] 郑超凡[5] 孙九霄 LI Hongjun;HAN Yang;SONG Xiaofei;ZHENG Shaowen;ZHENG Chaofan;SHUN Jiuxiao(School of Mechanical Engineering and Automation,Wuhan Textile University,Wuhan 430073,China;School of Materials Science and Engineering,Wuhan Textile University,Wuhan 430073,China;School of Energy and Power Engineering,Inner Mongolia University of Technology,Hohhot 010051,China;Hubei Provincial Engineering Research Center for Intelligent Assembly of Industrial Detonators,Wuhan 430073,China;China Ship Research and Design Center,Wuhan 430064,China;State Key Laboratory of New Textile Materials and Advanced Processing Technologies,Wuhan Textile University,Wuhan 430073,China)

机构地区：[1]武汉纺织大学机械工程与自动化学院,武汉430073 [2]武汉纺织大学材料科学与工程学院,武汉430073 [3]内蒙古工业大学能源与动力工程学院,呼和浩特010051 [4]工业雷管智能装配湖北省工程研究中心,武汉430073 [5]中国舰船研究设计中心,武汉430064 [6]武汉纺织大学纺织新材料与先进加工技术国家重点实验室,武汉430073

出　　处：《复合材料科学与工程》2024年第4期40-48,共9页Composites Science and Engineering

基　　金：湖北省重点研发项目(2021BAA069)。

摘　　要：纤维柱增强泡沫夹芯材料孔柱在加工过程中会产生一定的锥度,为研究孔柱锥度对夹芯结构压缩性能的影响,设计并制备了15组不同锥度孔柱的纤维柱增强复合材料。对制备的夹芯结构进行准静态压缩试验并结合数值模拟,研究了孔柱锥度与芯材厚度对夹芯结构压缩强度、模量、比强度以及失效形式的影响。结果表明:芯材厚度为25 mm、30 mm、35 mm的夹芯结构,孔柱锥度由0°提升至16°后,压缩强度分别提升了14.7%、22%、24.8%,压缩模量分别提升了25.9%、31.6%、37.7%,比强度分别提升了4%、9.95%、10.24%;孔柱锥度较小和无锥度孔柱的夹芯结构失效形式为纤维柱的屈曲、断裂,且屈曲、断裂位置随着孔柱锥度的增大逐渐向孔径较小的一端偏移;当孔柱锥度提升至16°时,夹芯结构中部分纤维柱孔径较小的一端与面板发生脱黏,导致纤维柱未能起到良好的支撑效果,影响材料的力学性能。In order to study the influence of the taper of the pore column on the.compression performance of the core structure,15 sets of fibre column reinforced.composites with different tapered pore columns were designed and prepared.Quasi-static.compression experiments and numerical simulations were carried out on the prepared sandwich structures to investigate the effects of hole-column taper and core thickness on the.compressive strength,modulus,specific strength and failure mode of the sandwich structures.The results show that for sandwich structures with core thicknesses of 25 mm,30 mm and 35 mm,the increase in hole-column taper from 0° to 16° increases the.compression strength by 14.7%,22% and 24.8%,the.compression modulus by 25.9%,31.6% and 37.7%,respectively,and the specific strength by 4%,9.95% and 10.24%.Failure of core structures with small and non-tapered pore columns is in the form of buckling and fracture of the fibre column,with the location of buckling and fracture gradually shifting towards the smaller end of the pore diameter as the taper of the column increases.When the taper of the hole column is raised to 16°,part of the core structure with the smaller aperture end of the fibre column becomes debonded from the panel,resulting in the fibre column failing to provide good support and affecting the mechanical properties of the material.

关 键 词：复合材料 泡沫夹芯 纤维增强 压缩性能 有限元分析 

分 类 号：TB332[一般工业技术—材料科学与工程]