• CN:11-2187/TH
  • ISSN:0577-6686

›› 2005, Vol. 41 ›› Issue (12): 200-204.

• 论文 • 上一篇    下一篇

拼焊板弯曲回弹的理论与试验研究

姜银方;袁国定;杨继昌;汪建敏;朱元右   

  1. 江苏大学机械工程学院;南京工程学院机械工程系
  • 发布日期:2005-12-15

SPRINGBACK IN THE BENDING OF TAILOR WELDED BLANKS IN THEORY AND EXPERIMENT

Jiang Yinfang;Yuan Guoding;Yang Jichang;Wang Jianmin;Zhu Yuanyou   

  1. School of Mechanical Engineering, Jiangsu University Department of Mechanical Engineering, Nanjing Institute of Technology
  • Published:2005-12-15

摘要: 在平断面假设、纯弯曲假设、拼焊板不考虑焊缝等一系列较为合理的假设条件下,推导了拼焊板弯曲回弹解析模型。推导考虑材料有指数硬化特性和中性层的移动及应力应变中性层的不重合性等问题,但没有考虑包辛格效应的影响和中性层的转动问题。针对这个弯曲回弹公式,编程计算差厚(1.6 mm/0.8 mm)拼焊板的回弹值,并采用75°V形自由弯曲试验进行了验证;对拼焊板的弯曲回弹进行了理论分析,提出了拼焊板相对弯曲半径的概念。

关键词: 回弹, 拼焊板, 弯曲, 富氧燃烧, 技术经济, 净效率, 空分, 燃气轮机

Abstract: By simulations and experiments, a series of proper consumptions are confirmed about flat section, pure bending, neglect of weld line, etc. The bending of tailor-welded blanks is analyzed and the mathematical model of the springback in the bending of tailor welded blanks is deduced with exponential harden , pure plastic bending, the movement of neutral layer , the non-coincidence of the neutral layer between stress and strain. But in the deduction, the Bauschinger effect and the rotation of neutral layer are neglected. The springback angle of tailor-welded blank with thickness ratio 2(1.6/0.8 mm) is calculated for this analytical model and verified by free bending experiment. With the analysis of bending springback, the idea of relative bending radius of tailor-welded blanks is put forward.

Key words: Bend, Springback, Tailor-welded blanks, Air Separation Units, Oxygen-enriched Combustion, Power Supply Efficiency, Gas Turbines, Techno-economic Study

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