纤维-金属混合夹层梁弯曲性能试验研究  

EXPERIMENTAL STUDY ON FLEXURAL PERFORMANCE OF FIBER-METAL HYBRID SANDWICH BEAM

作　　者：丁洁明 刘伟庆[1] 万里[1] 王璐[1] 方海[1] 

机构地区：[1]南京工业大学土木工程学院,南京211816

出　　处：《玻璃钢／复合材料》2016年第5期12-16,共5页Fiber Reinforced Plastics/Composites

基　　金：国家自然科学基金(51208251);国家自然科学基金重点项目(51238003);江苏省高校自然科学基金重大项目(15KJA560001)

摘　　要：对纤维-金属混合夹层梁(FMS)进行试验,该结构自上而下主要由无碱玻璃纤维、带齿钉金属板、泡桐木、带齿钉金属板、无碱玻璃纤维组成,其中金属板与泡桐木之间采用齿钉相连,金属板与无碱玻璃纤维之间采用不饱和聚酯树脂粘结。通过四点弯曲试验,得到了纤维-金属混合夹层梁(FMS)在不同跨高比下的弯曲性能和破坏模式,并与纤维增强夹层梁(FSS)进行对比,同时根据不同的破坏模式采用不同的理论公式对FMS试件承载力进行验证,结果表明,在跨高比为10、12、16、20、24时,FMS的极限承载力及抗弯刚度均得到了提高,理论求得的承载力值与试验值吻合较好。In this paper,the fiber-metal hybrid sandwich beam（ FMS） was fabricated. From top to bottom,alkali-free glass fiber,the metal sheet with tooth nail,paulownia wood,the metal sheet with tooth nail and alkali-free glass fiber were arranged. Tooth nail was used to connect the metal plate with paulownia and unsaturated polyester resin was used to connect the metal plate with non-alkali fiber glass. According to four-point bending tests,the bending performance and failure modes of FMS with different span-depth ratio were investigated and compared with the ordinary fiber reinforced sandwich beam（ FSS）. An analytical formula to identify failure modes was also obtained to validate the bearing capacity. The test results show that when span-depth of the beam were 10,12,16,20,24,the ultimate bearing capacity and bending stiffness of the FMS were increased. The calculated bearing capacity agreed well with the experiment results.

关 键 词：纤维-金属混合夹层梁 弯曲性能 破坏模式 抗弯刚度 

分 类 号：TB332[一般工业技术—材料科学与工程]