铺层方式对CFRP-Al单搭接接头胶接性能的影响  

Effect of Stacking Sequences on Bonding Performance of CFRP-Al Single-lap Joint

作　　者：邹田春 巨乐章 李龙辉 符记 ZOU Tianchun;JU Yuezhang;LI Longhui;FU Ji(College of Airworthiness,Civil Aviation University of China,Tianjin 300300,China)

机构地区：[1]中国民航大学适航学院,天津300300

出　　处：《材料研究学报》2022年第9期715-720,共6页Chinese Journal of Materials Research

摘　　要：使用热压罐制备[45/-45]_(4s)、[0/90]_(4s)和[0/45/-45/90]_(2s)三种铺层方式的CFRP层合板,然后在室温下与Al胶接制备出单搭接试样。使用电子万能试验机、数字图像相关法(DIC)和扫描电子显微镜(SEM)等手段测量胶接接头的拉伸载荷-位移曲线和应变分布并观察断口形貌。基于试验数据分析不同铺层方式下CFRP-Al单搭接接头的拉伸性能,研究了铺层方式对CFRP-Al单搭接接头胶接性能的影响和铺层方式胶接接头的破坏机制。结果表明,在拉伸过程中[45/-45]_(4s)试样出现塑性变形阶段其拉伸位移最大,而[0/45/-45/90]_(2s)和[0/90]_(4s)试样的拉伸位移较小且发生了脆性断裂。铺层方式从[45/-45]_(4s)到[0/45/-45/90]_(2s)再到[0/90]_(4s),试样的极限载荷和纤维束断裂数量增加、层间剪切力减小、应变集中程度和分层破坏程度降低。Laminated plates of carbon fiber reinforce plastic(CFRP)with different stacking sequences,namely[45/-45]_(4s),[0/90]_(4s) and[0/45/-45/90]_(2s) were produced via autoclave.They were glue-jointed with Al-plate to prepare single-lap joint samples at room temperature.The single-lap joint performance of the prepared samples was assessed by means of universal testing machine,digital image correlation(DIC)and scanning electron microscope(SEM)in terms of load-displacement curves,strain field distribution and fracture appearance of adhesive joints.On this basis,the mechanical properties of CFRP-Al single-lap joints were analyzed,the influence of different stacking sequences on the bonding performance of CFRP-Al single-lap joints,while the failure mechanism of adhesive joints were revealed.The results show that during the tensile process,the sample with[45/-45]_(4s) presents a plastic deformation stage and its tensile displacement is the largest;while the tensile displacements of samples with[0/45/-45/90]_(2s) and[0/90]_(4s) are less,and they present brittle fracture.In general,the ultimate load of the sample and the number of fiber bundles fracture increase for samples in the following order,namely samples with[45/-45]_(4s),[0/45/-45/90]_(2s) and[0/90]_(4s),but their interlaminar shear force,the strain field concentration degree and the delamination damage degree gradually decrease.

关 键 词：复合材料 铺层方式 异质材料胶接 应变分布 断口形貌 

分 类 号：TB33[一般工业技术—材料科学与工程]