期刊信息
主管单位:国家教育部
主办单位:重庆大学
主  编:
地  址:重庆市沙坪坝正街174号
邮政编码:400030
电  话:023-65102302
电子邮件:xbsg@cqu.edu.cn
国际标准刊号:ISSN 1000-582X
国内统一刊号:CN 50-1044/N
邮发代号:国内78-16 国外 M355
引用本文:
【打印本页】   【HTML】   【下载PDF全文】   查看/发表评论  下载PDF阅读器  关闭
←前一篇|后一篇→ EndNote   BibTeX  过刊浏览    高级检索
本文已被:浏览 1113次   下载 388 本文二维码信息
码上扫一扫!
分享到: 微信 更多
含双半圆形埋藏裂纹金属构件脉冲放电温度场分析
付宇明, 王宁宁, 郑丽娟
燕山大学 机械工程学院,河北 秦皇岛 066004
摘要:
裂纹止裂技术是当前航空航天、船舶、军事及机械制造等许多工业生产和实际应用中急需解决的关键问题。针对含双半圆形埋藏裂纹金属构件脉冲放电问题,在理论上推导出脉冲放电后裂纹尖端附近电流密度分布和温度场分布以及两裂纹相互之间的热影响关系,采用有限元软件建立了三维有限元模型。由理论计算与数值分析可知,两方法所得温度场分布规律一致,温度误差和相对误差分别为75.560℃、3.150%,并对含双半圆形埋藏裂纹金属构件进行了脉冲放电实验研究,脉冲放电后裂纹尖端熔化、钝化。
关键词:  脉冲放电  双半圆形埋藏裂纹  裂纹止裂  数值模拟  温度场
DOI:10.11835/j.issn.1000-582X.2014.01.003
分类号:
基金项目:国家自然科学基金资助项目(51075351;51105325)
Analysis on temperature field of pulse current discharge in metal component with double semicircle immerged crack
FU Yuming, WANG Ningning, ZHENG Lijuan
College of Mechanical Engineering, Yanshan University, Qinhuangdao, Hebei 066004, China
Abstract:
The application of crack prevention techniques is badly needed in various industries. There are many practical applications, such as in space flight and aviation, shipping, military affairs and machine manufacturing. The current density distribution, temperature field distribution of flow around the crack tip and the heat affected of two cracks are derived theoretically in view of the pulse discharge in metal component with double semicircle immerged crack. A three-dimensional finite element model with semicircular embedding crack is established by finite element software ANSYS to analyze the temperature filed. The distribution law of temperature field is consistent with the results of theoretical calculations and numerical results, and the maximum temperature error and relative error are 75.560 ℃ and 3.150% respectively. By pulse discharge experiments, the crack tip melts and passivated after pulse discharge.
Key words:  pulse discharge  double semicircle immerged crack  crack arrest  numerical simulation  temperature field
Copyright@ 2008 All Rights Reserved.