Deformation Behavior of Thin-Walled Tubes Bending with Internal Pressure
In order to avoid wrinkling and cross-section distortion defects during bending of thin-walled tube, supportive internal pressure can be applied to inner of tube. Numerical simulation and experiment were conducted for investigating deformation behavior of tube bending with internal pressure. Effect of internal pressure on cross-section distortion and wall thickness distribution were researched. Relation between non-circularity, internal pressure and relative bending radius was established. The stress states at intrados and extrados were analyzed to examine the mechanics of extension of forming limit with internal pressures. The results show that thin-walled tube bending with supportive pressure could largely alleviate the section flattening and wrinkling tendency, which would extend the forming limit significantly. With an increasing internal pressure, non-circularity of tube decreases, and the tendency of thickness thinning increases.
Bugang Teng Lan Hu Shijian Yuan
School of Materials Science and Engineering, Harbin Institute of Technology,Harbin 150001, China
国际会议
桂林
英文
1-7
2010-11-16（万方平台首次上网日期，不代表论文的发表时间）