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(1．6mm／0．8mm)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。
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 nun） 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.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2005年第12期200-204,共5页
Journal of Mechanical Engineering
基金
江苏省自然科学基金(BK2002009)国家自然科学基金(50475125)资助项目。
关键词
拼焊板
弯曲
回弹
Tailor-welded blanks Bend Springback
