摘要
对碳钢表面分别进行硅烷和磷化处理,然后用环氧树脂胶粘剂粘接.研究了不同表面处理的胶接接头力学性能,分析了金属表面处理方法对胶粘剂/金属界面疲劳性能的影响.在胶接接头施加疲劳载荷,测量了胶接接头疲劳前后的强度-位移曲线.对比疲劳前后界面剪切强度的变化,采用断裂力学理论分析了界面裂纹扩展过程.结果表明:表面经硅烷处理后,界面粘接强度最大,耐疲劳性能最好.胶接接头的失效通常在界面发生,能量可以通过裂尖扩展释放,也可以通过粘接层的塑性变形释放.
Metal surfaces were treated by silane, phosphate and untreated respectively, and then adhered by epoxy resin. The mechanical properties of the adhesive joints by different treatment methods were investigated and the effect of surface treatment on the fatigue performance of the adhesive/metal interface was analyzed. The stress-strain curves of the adhesive joints were compared before and after fatigue load was applied on the joints. Crack propagation in the interface was discussed on the basis of fracture mechanics. The results show that the fatigue resistance of silane-treated samples is the best and the adhesive strength is the greatest. Adhesion failure always initiates at the interface. Energy can release through propagation of crack tips and also can through plastic deformation of the adhesive layer.
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
2008年第12期1338-1341,共4页
Journal of University of Science and Technology Beijing
关键词
胶接接头
界面
表面处理
粘接性能
力学性能
adhesive joint
interface
surface pretreatment
adhesive performance
mechanical properties
