车门焊缝疲劳寿命问题研究
张睿诚1，齐静2，杨昌棋1
（1.重庆大学 航空航天学院，重庆 400044；2.北京汽车技师学院，北京 102606）
摘要：针对某自主品牌汽车车门早期开裂问题，研究车门焊缝疲劳寿命的影响因素。重点对焊接结构疲劳寿命的影响因素中的焊接方式（人工焊接或机器人焊接）、焊接方法（CO2焊接碳钢焊丝或CMT焊接硅青铜焊丝）和焊缝长度（12 mm或20 mm）进行研究。为了解车门特定部位在“开－闭”循环过程中的应变特性，对实物车门在疲劳耐久性实验中焊缝位置的周边进行了动态应变测试分析。最后结合现场检测，疲劳耐久性试验和理论分析结果，得出提高车门焊缝疲劳寿命的方案。
关键词：车门焊缝；疲劳寿命；动态测试
中图分类号：TG113.26+3 文献标志码：A doi：10.3969/j.issn.1006-0316.2017.04.004
文章编号：1006－0316 (2017) 04－0015－04
Research on Weld Fatigue Life of the Door of a Car
ZHANG Ruicheng1，QI Jing2，YANG Changqi1
( 1.College of Aerospace Engineering, Chongqing University, Chongqing 400044, China;2.BAIC Tech School, Beijing 102606, China )
Abstract：Based on an independent brand automobile door’s early cracking problems, this paper study the factors that influencing the door of the weld fatigue strength. Because of many factors that affect the fatigue life of welded structure, this paper focuses on three factors, including welding way (manual welding or robot welding), welding method (CO2 welding of carbon steel wire or CMT welding of silicon bronze wire) and the weld length (12 mm or 20 mm). In order to understand the specified in certain parts of the door, it is "on - off" in the process of circulation strain characteristics of the physical doors around the weld position in fatigue durability experiments to analyze the dynamic strain testing. Finally, combining with field and fatigue durability test and theoretical analysis, put forward the corresponding improvement suggestions to improve the fatigue life of welding seam door.
Key words：door welds；fatigue life；dynamic testing
———————————————
收稿日期：2016－12－06
作者简介：张睿诚（1991－），男，湖北襄阳人，硕士研究生，主要研究方向为实验力学及测试技术。
- 上一篇：基于有限元气体静压主轴模态分析
- 下一篇：基于准时交货的多品种小批量生产调度系统研究
设为首页 | 加入收藏 | 免责条款
《机械》杂志版权所有 Copyright©2008-2012 Jixiezazhi.com All Rights Reserved
电话：028-85925070 传真：028-85925073 E-mail：jixie@vip.163.com
地址：四川省成都锦江工业开发区墨香路48号 邮编：610063
Powered by PageAdmin CMS