格构增强泡沫夹芯复合材料管侧向压缩  

Lateral Compression of Lattice Reinforced Foam Sandwich Composite Pipes

作　　者：陈航 方海[1] 李晓龙[1] 樊子砚 CHEN Hang;FANG Hai;LI Xiaolong;FAN Ziyan(College of Civil Engineering,Nanjing Tech University,Nanjing 211800,China)

机构地区：[1]南京工业大学土木学院,江苏南京211800

出　　处：《材料科学与工程学报》2023年第1期23-29,共7页Journal of Materials Science and Engineering

基　　金：国家自然科学基金面上资助项目(52078248,51778285);江苏省杰出青年基金资助项目(BK20190034)。

摘　　要：以聚氨酯泡沫为夹芯层、玻璃纤维增强树脂复合材料(GFRP)为面层和格构腹板,运用真空导入工艺制备了4个参数不同的复合材料圆管,对其进行了侧向压缩试验,分析格构数量等参数对结构承载性能的影响。基于能量法,运用等效十字模型将格构腹板和泡沫芯材等效为均质材料,得到其面内等效弹性模量。运用层合理论推导了复合材料管在侧向压缩下的荷载和位移关系,并与试验值进行了对比,研究表明:随着格构腹板数量增加,构件的极限承载力逐渐增大;对比试验结果与理论分析,格构腹板增强构件较无格构腹板构件误差较小;层合理论适用于界面协同能力较好、面层与芯材不易剥离的结构。Four composite tubes with different parameters were prepared by vacuum introduction process with polyurethane foam as sandwich layer,glass fiber reinforced resin composite(GFRP)as surface layer and lattice web.The lateral compression tests were carried out,and the effects of parameters such as the number of lattices on the bearing properties of the members were analyzed.Based on the energy method,the lattice web and foam core are equivalent to homogeneous materials by using the equivalent cross model,and the equivalent elastic modulus in plane is obtained.The relationship between load and displacement of composite pipe under lateral compression is deduced by lamination theory.The results are compared with the experimental values.The results show that with the increase of the number of lattice webs,the ultimate bearing capacity of members increases gradually.Compared with the experimental results and theoretical analysis,the error of lattice web reinforced members is smaller than that of unlattice web members.Lamination theory is suitable for structures with good interfacial coordination and difficult to peel off surface and core materials.

关 键 词：格构增强 复合材料 能量法 层合理论 侧压试验 

分 类 号：TU599[建筑科学—建筑技术科学]