A Multi-Objective Optimization Method for Thin-Walled Tube NC Bending

Jie Xu; He Yang; Heng Li

doi:10.4028/www.scientific.net/AMR.213.383

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 213A Multi-Objective Optimization Method for...

A Multi-Objective Optimization Method for Thin-Walled Tube NC Bending

Abstract:

A multi-objective optimization method for thin-walled tube NC bending is presented. Firstly, a half-symmetry 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 Ф50×1×100 (tube outside diameter ×tube wall thickness × central line bending radius) and Ф100×1.5×200 aluminum alloy tube bending. It is proved that the forming quality has been improved by the method.

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Periodical:

Advanced Materials Research (Volume 213)

Pages:

383-387

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.213.383

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Online since:

February 2011

Authors:

Jie Xu, He Yang, Heng Li

Keywords:

Finite Element Model (FEM), Multi-Objective Optimization (MOP), NC Bending, Orthogonal Array, Sequential Quadratic Programming, Thin-Walled Tube

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