考虑接头几何参数的I-core全钢三明治板的刚度分析  

Stiffness analysis considering joint geometry parameters of I-core steel sandwich plates

作　　者：蒋小霞[1,2] 朱亮[1] 乔及森[1] 吴毅雄[3] 李铸国[3] 陈剑虹[1] 

机构地区：[1]兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室,兰州730050 [2]宁夏大学机械工程学院,银川750021 [3]上海交通大学上海市激光制造与材料改性重点实验室,上海201100

出　　处：《焊接学报》2015年第11期45-48,115,共4页Transactions of The China Welding Institution

基　　金：国家自然科学基金重点资助项目(51035004);宁夏大学人才引进科研启动基金资助项目(BQD2014021)

摘　　要：激光焊接I-core三明治板常用的刚度设计公式,没有考虑接头几何参数的影响,在实际应用中其准确性受到影响.通过外伸三点弯曲试验,对六种接头几何参数的I-core全钢三明治板的弯曲刚度和剪切刚度进行测量,并结合有限元计算,分析了接头几何参数对弯曲刚度和剪切刚度的影响.结果表明,增加焊缝宽度可显著提高弯曲刚度和剪切刚度,而焊缝宽度大于60%芯板厚度后,焊缝宽度对刚度的影响减小.间隙对刚度的影响可忽略.基于此结果,对三明治板设计时常用的刚度公式进行了修正.For laser welded I-core steel sandwich plates,in the design formulas of the stiffness the influence of joint geometric parameters are not considered commonly. Therefore the accuracy is lack in practice. The three-point bending tests were investigated for the sandwich plates with six kinds of joint geometric parameter by self-designed device together with the finite element simulations. The aim is to research the effect of joint geometric parameters on the bending stiffness and shear stiffness.The results showed that the increase of weld width can significantly improve the bending stiffness and shear stiffness. However,when the weld width is greater than 60% thickness of coreplates,the increase of stiffness became slow. The influence of root gap to the stiffness can be ignored. Based on these results,the corrected and simplified stiffness formula was offered for sandwich plate stiffness design considering joint geometry parameters.

关 键 词：激光焊接 I-core全钢三明治 弯曲刚度 剪切刚度 接头几何参数 

分 类 号：TG404[金属学及工艺—焊接]