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Materials 2013, 6(11), 5118-5130; doi:10.3390/ma6115118
Article

Investigation on the Residual Stress State of Drawn Tubes by Numerical Simulation and Neutron Diffraction Analysis

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Received: 11 August 2013 / Revised: 14 October 2013 / Accepted: 1 November 2013 / Published: 8 November 2013
(This article belongs to the Section Structure Analysis and Characterization)
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Abstract

Cold drawing is widely applied in the industrial production of seamless tubes, employed for various mechanical applications. During pre-processing, deviations in tools and their adjustment lead to inhomogeneities in the geometry of the tubes and cause a gradient in residuals. In this paper a three dimensional finite element (3D-FE)-model is presented which was developed to calculate the change in wall thickness, eccentricity, ovality and residual macro-stress state of the tubes, produced by cold drawing. The model simulates the drawing process of tubes, drawn with and without a plug. For finite element modelling, the commercial software package Abaqus was used. To validate the model, neutron strain imaging measurements were performed on the strain imaging instrument SALSA at the Institute Laue Langevin (ILL, Grenoble, France) on a series of SF-copper tubes, drawn under controlled laboratory conditions, varying the drawing angle and the plug geometry. It can be stated that there is sufficient agreement between the finite element method (FEM)-calculation and the neutron stress determination.
Keywords: finite element method; numerical simulation; tube drawing; residual stress; neutron strain imaging finite element method; numerical simulation; tube drawing; residual stress; neutron strain imaging
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Palkowski, H.; Brück, S.; Pirling, T.; Carradò, A. Investigation on the Residual Stress State of Drawn Tubes by Numerical Simulation and Neutron Diffraction Analysis. Materials 2013, 6, 5118-5130.

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