CAJ | 학술논문

运用有限元法研究了偏轴、同轴和折曲型等三种单搭接胶接接头的工作应力分布规律.结果表明:与其他两种接头相比,折曲型单搭接胶接接头可有效降低搭接区端部的剥离应力和剪切应力峰值;在数值分析所用参数及条件下,Ⅰ型折曲接头的剥离应力降幅超过了75%,其他峰值应力的降幅也超过了45%～50%,并且应力分布趋于均匀;Ⅰ型折曲接头使出现应力峰值的位置从搭接区的端部转移至中部,从而显著提高了接头的承载能力,是一种优于普通同轴接头的胶接接头形式;对于受剪切载荷作用的接头而言,采用Ⅱ型折曲接头更为合理,可进一步提高接头承受剪切载荷的能力.
운용유한원법연구료편축、동축화절곡형등삼충단탑접효접접두적공작응력분포규률.결과표명:여기타량충접두상비,절곡형단탑접효접접두가유효강저탑접구단부적박리응력화전절응력봉치;재수치분석소용삼수급조건하,Ⅰ형절곡접두적박리응력강폭초과료75%,기타봉치응력적강폭야초과료45%～50%,병차응력분포추우균균;Ⅰ형절곡접두사출현응력봉치적위치종탑접구적단부전이지중부,종이현저제고료접두적승재능력,시일충우우보통동축접두적효접접두형식;대우수전절재하작용적접두이언,채용Ⅱ형절곡접두경위합리,가진일보제고접두승수전절재하적능력.
The distribution rule of working stress for three types single-lap bonding joints (namely off-axis, coaxial and crippling joints) were studied by finite element method. The results showed that compared with other two kinds of joints ,the crippling bonding joints with single-lap could effectively reduce the peak value of peeling stress and shearing stress in end of bonding area. Under the using parameters and condition for numerical value analysis,the peak value of peeling stress in crippling joint-Ⅰ was decreased by above 75% ,and peak values of other stresses were decreased by above 45%-50% ,but the stresses were evenly distributed. The carrying capacity of the crippling joint-Ⅰ was obviously increased because the location of peak stress were moved from end to center for bonding area,so the crippling joint-Ⅰ as a bonding joint form was better than general coaxial joint. In occasions of shearing loads,the using crippling joint-Ⅱ was more reasonable because the carrying capacity of it can be further enhanced in shearing loads.