镁合金摩擦搅拌焊搭接接头疲劳寿命预测

毛志亮; 王瑞杰; 黄军; 侯晓丹

doi:10.15980/j.tzzz.2017.05.031

轻有色合金 | 浏览量 : 0 下载量: 151 CSCD: 2

导出
分享
收藏
专辑

镁合金摩擦搅拌焊搭接接头疲劳寿命预测
Fatigue Life Prediction of Frictional Stirring Welded Lap Magnesium Alloy Joints
2017年37卷第5期页码：572-576
纸质出版日期： 2017 ，
DOI： 10.15980/j.tzzz.2017.05.031

扫描看全文

[1]毛志亮,王瑞杰,黄军,侯晓丹.镁合金摩擦搅拌焊搭接接头疲劳寿命预测[J].特种铸造及有色合金,2017,37(05):572-576.

Mao Zhiliang, Wang Ruijie, Huang Jun, et al. Fatigue Life Prediction of Frictional Stirring Welded Lap Magnesium Alloy Joints[J]. Special Casting & Nonferrous Alloys, 2017,37(5):572-576.
[1]毛志亮,王瑞杰,黄军,侯晓丹.镁合金摩擦搅拌焊搭接接头疲劳寿命预测[J].特种铸造及有色合金,2017,37(05):572-576. DOI： 10.15980/j.tzzz.2017.05.031.

Mao Zhiliang, Wang Ruijie, Huang Jun, et al. Fatigue Life Prediction of Frictional Stirring Welded Lap Magnesium Alloy Joints[J]. Special Casting & Nonferrous Alloys, 2017,37(5):572-576. DOI： 10.15980/j.tzzz.2017.05.031.

摘要

研究了钩状尖端半径及有效厚度对镁合金摩擦搅拌焊搭接接头疲劳寿命的影响

建立了不同有效厚度及钩状尖端半径的有限元模型。利用有限元软件对其进行拉伸力学响应的模拟试验

分析在不同载荷下的接头局部应力应变分布

并利用疲劳损伤方程SWT和MC分别对其进行寿命预测。结果表明

应力集中主要位于钩状尖端周围

采用SWT疲劳方程对接头寿命预测结果会更加准确

且疲劳寿命随钩状尖端半径的增大而增大

随有效厚度的增加而增加。

Abstract

In order to understand effects of the hook tip radius and effective thickness on the fatigue life of the frictional stirring welded magnesium alloy lap joints

the finite element models at different effective thickness and hook tip radius were established.The tensile mechanical response of simulation testing was analyzed by the finite element software

and local stress and strain distribution of the lap joints were analyzed under varied external loads.In addition

fatigue life of lap joints was predicted by fatigue damage equation of SWT and MC.The results show that stress concentration is mainly located around the hook tip of the lap joint

and fatigue damage equation of SWT can predict more accurately fatigue life of the joints.With the increases of hook tip radius and effective thickness

the fatigue life is increased.