复合板材双剪切试验方法与装置  

Double shear testing method and device for composite panels

作　　者：杜强[1] 丁荣[1] 吕晶[1] 陈一秀[1] 

机构地区：[1]长安大学建筑工程学院,陕西西安710061

出　　处：《长安大学学报（自然科学版）》2015年第6期85-90,116,共7页Journal of Chang’an University(Natural Science Edition)

基　　金：教育部博士点基金项目(20110205120005);陕西省国际合作重点项目(2013KW13-01);中央高校科研基金高新技术项目(2014G2280013;310828151065);西安市建设科技计划项目(SJW201225;SJW201322;SJW2014003)

摘　　要：针对复合板材在工程应用中的力学性能分析需求,为测量其平行于试件面板方向的剪切破坏荷载,以能够较准确表征复合板材双剪状态下的应力分布情况,研究了复合板材双剪切试验方法,设计了双剪切试验装置,并对不同芯材和不同厚度的结构保温板进行了双剪切试验,分析了其破坏形态和剪切力学性能。研究结果表明:各试件双剪切破坏面形态合理,应力-应变曲线数据稳定;EPS(聚苯乙烯泡沫)芯材试件抗剪破坏形式为脆性破坏,而岩棉芯材试件受剪开裂后,抗剪强度不会立即丧失,而是逐渐降低;随着试件芯材厚度的增加,EPS芯材试件应力峰值和应变随之减小,两者变化均为非线性,而岩棉芯材试件应力峰值随之减小,应变则无明显相关关系。该方法与装置为进一步研究复合板材的力学性能提供了试验方法。With regard to the demand of mechanical performance of composited panels in the engineering application,the double shear testing method was studied and the device was designed,aiming to measure the shear failure load in the direction parallel to the panels and characterize the stress distribution of composite panels in double shear state.Double shear test on structural insulated panels with different core materials and thickness was conducted;the failure modes and mechanical properties were analyzed.The results show that the failure surface shapes of specimens in the double shear test are appropriate and the data of the stress-strain curve is steady.The shear failure mode of EPS cored specimens belong to brittle failure,while the rock wool cored specimens don＇t lose their strength immediately after cracking but gradually reduce.With the increase of core material thickness of the specimen,the peak stress and strain of EPS cored specimen reduce nonlinearly;while the peak stress of rock wool cored specimen reduces but strain has no obvious correlation.The method and device can provide testing method for further research on mechanical properties of composited panels.2tabs,12 figs,16refs.

关 键 词：建筑工程 双剪切 复合板材 试验方法 试验装置 

分 类 号：TU502.6[建筑科学—建筑技术科学]