格构增强木芯复材板的弯曲性能试验及其理论分析  

Experimental Study on Flexural Behavior of Wood Core Sandwich Composite Panels Reinforced by Lattice-webs

作　　者：王蕴天 方海[1] 吴中元[1] 刘伟庆[1] WANG Yuntian;FANG Hai;WU Zhongyuan;LIU Weiqing(College of Civil Engineering,Nanjing Tech University,Nanjing 211816,China)

机构地区：[1]南京工业大学土木工程学院,江苏南京211816

出　　处：《材料科学与工程学报》2021年第5期791-796,共6页Journal of Materials Science and Engineering

基　　金：国家自然科学基金资助项目(51578285)。

摘　　要：设计一种新型格构增强木芯复材板,通过四点弯试验研究其抗弯性能。该复材板的面层及腹板为复合材料(FRP),芯材分为泡桐木和南方松两种。保持复材板截面尺寸不变,分别将1、2、3、4块木芯利用真空辅助树脂传递模塑工艺一次成型,从而改变格构腹板数目。此外,以纯木板作为对照试验标的物。结果表明:木芯种类会影响木芯复材板的抗弯性能;不同芯材的最佳格构数目也不同;格构数目增加不会导致复材板刚度产生线性增加。The flexural behavior of lattice-webs reinforced composite sandwich panels was investigated.Four-point bending test was carried out on all panels to study the bearing capacity and stiffness.The innovative composite sandwich panel is made up with fiber reinforce plastic(FRP)composite as the surface layer and lattice-web,Paulownia wood and Southern pine wood as the core material.While keeping the external size unchanged,1,2,3 and 4 wood cores are formed by vacuum infusion process in one time,as to develop different number of lattice-webs.In addition,the wood panel was used as a control.The results show that the type of wood core has great influence on the flexural behavior of composite sandwich panels.The optimum lattice number of different core materials is different.Increasing the lattice number will not result in a linear increase in the stiffness of the composite sandwich panel.

关 键 词：格构腹板 复合材料夹芯板 木芯 抗弯性能 

分 类 号：TB332[一般工业技术—材料科学与工程] TB301