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

Abstract:

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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:

Edited by:

Zhang Yushu

Pages:

383-387

DOI:

10.4028/www.scientific.net/AMR.213.383

Citation:

J. Xu et al., "A Multi-Objective Optimization Method for Thin-Walled Tube NC Bending", Advanced Materials Research, Vol. 213, pp. 383-387, 2011

Online since:

February 2011

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Price:

$35.00

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