摘要
基于弹性力学理论建立了偏心荷载作用下板材类单搭接胶接接头界面粘结应力的计算模型,研究了偏心荷载作用下界面粘结剪应力随各粘结参数的变化规律,给出了单搭接胶接接头的定量设计公式,指出了各参数对界面粘结剪应力的影响程度。结果表明:偏心荷载作用时,界面粘结剪应力最大峰值位于粘结角处,该处最先发生破坏,可通过增加接头搭接宽度和搭接长度来抑制界面间粘结破坏的发生;并且剪应力会随着距离的增加呈现出非线性递减趋势;另外,在偏心荷载作用下,如果采用硬度较小的接头板材,会导致角点处产生较大的粘结应力。将这些规律和特点应用在实际工程中,可以避免单搭接胶接接头破坏。
Based on theory of elastic mechanics, the bonding stress model of adhesively bonded single lap joint under eccentric load was established. The effects of different parameters on the interfacial shear stress were investigated. A quantitative design formula of the single lap joint was given. The results show that the maximum shear stress is located at the bond corner, which will be first damaged. However, the bond failure can be avoided by increasing the width and length of the single lap joint. The shear stress decreases nonlinearly with the increase in distance. Besides, if the hardness of the overlap plate is lower, the bond stress at the corner will be higher under eccentric load. The results of this study provide a reference for engineering practice.
出处
《吉林大学学报（工学版）》
EI
CAS
CSCD
北大核心
2016年第6期1874-1880,共7页
Journal of Jilin University:Engineering and Technology Edition
基金
国家自然科学基金项目(51308256)
住房和城乡建设部项目(2014K1066)
吉林省教育厅"十二五"科技项目(2015265)
关键词
机械设计
偏心荷载
界面应力
胶层
单搭接接头
mechanical design
torsional loading
interfacial stress
adhesive layer
single lap joint
