摘要
本文以改进褶皱夹芯结构为研究对象,提出一种双曲型碳纤维夹芯结构.基于其结构复杂性,采用分离式阴阳模具热压成型工艺实现高效制备.通过面外压缩试验和Abaqus有限元模拟,系统研究了[0/90]_(3)、[0/0/90]_(S)、[45/-45]_(3)三种铺层结构的破坏模式、失效机制及力学性能,获得相应应力-应变曲线与失效云图.研究表明,三种铺层结构的压缩强度分别为6.38 MPa、6.72 MPa和3.94 MPa,纤维铺层角度对芯子的失效模式影响不大,三种铺层结构均为屈曲和压溃混合主导的失效模式.
This study focuses on an enhanced folded core sandwich structure,proposing a novel hyperbolic carbon fiber sandwich configuration.Given the structural complexity,a separated male-female mold hot-pressing process was adopted to enable efficient fabrication.Out-of-plane compression tests and Abaqus finite element simulations were conducted to systematically investigate the failure modes,mechanisms,and mechanical properties of three layup configurations:[0/90]_(3),[0/0/90]_(S),and[45/-45]_(3).Corresponding stress-strain curves and failure nephograms were obtained.The results demonstrate that the compressive strengths of the three layup configurations are 6.38 MPa,6.72 MPa,and 3.94 MPa,respectively.The fiber orientation angle exhibits negligible influence on the failure modes of the core,with all three configurations showing combined failure mechanisms dominated by buckling and crushing.
作者
陆静
吴怀荣
祖士明
王海娇
董一航
LU Jing;WU Huairong;ZU Shiming;WANG Haijiao;DONG Yihang(School of Mechanical and Automotive Engineering,Guangxi University of Science and Technology,Liuzhou 545616,Guangxi,China)
出处
《力学季刊》
北大核心
2025年第2期446-456,共11页
Chinese Quarterly of Mechanics
基金
广西科技基地和人才专项(桂科AD23026141)
广西重点研发计划(桂科AB23075079)
广西硕士研究生创新项目(YCSW2024521)。
关键词
碳纤维复合材料
双曲型夹芯结构
褶皱
压缩性能
有限元
carbon fiber composites
hyperbolic sandwich structure
folds
compression performance
finite element method
