A Multi-objective Optimization Method for Thin-walled Tube NC Bending

摘要：

A multi-objective optimization method for thin-walled tube NC bending is presented. Firstly, a halfsymmetry 3D elastic-plastic FEM model is established based on the initial design values, applying the dynamic explicit code ABAQUS/Explicit. Secondly, virtual orthogonal arrays are designed to optimize friction coefficients, with minimizing the maximum wall-thinning ratio, the maximum cross section distortion ratio and the maximum height of wrinkling waves as the multi-objectives. Lastly, the mandrel radius is optimized by sequential quadratic programming with approximate regressive models fit from uniform design values in the allowed range. Application is put forward for Φ50×1×100 (tube outside diameter xrube Wall thickness×central line bending radius) and Φ100×1.5×200 aluminum alloy tube bending. It is proved that the forming quality has been improved by the method.

关键词： Multi-objective optimization Thin-walled tube NC bending Orthogonal arrays FEM Sequential quadratic programming

作者: Jie Xu He Yang Heng Li

作者单位: State Key Laboratory of Solidification Processing, School of Materials Science and Engineering,Northwestern Polytechnical University, P. O. Box 542, Xian, 710072, P. R. China

会议类型: 国际会议

会议名称: 2011 International Conference on Advanced Material Research(ICAMR 2011)(2011年先进材料研究国际会议)

会议地点: 重庆

会议语种:英文

页码: 383-387

在线出版日期: 2011-01-21（万方平台首次上网日期，不代表论文的发表时间）