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International Journal of Material Forming
Published in: International Journal of Material Forming 6/2019

28-01-2019 | Original Research

3D FEM-DEM coupling analysis for granular-media-based thin-wall elbow tube push-bending process

Authors: Hai Liu, Shi-Hong Zhang, Hong-Wu Song, Gao-Lian Shi, Ming Cheng

Published in: International Journal of Material Forming | Issue 6/2019

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Abstract

The granular-media-based thin-wall elbow push-bending process involves filling a tube with granular media and pushing the tube into a die to bend a tubular blank into an elbow shape. By means of the mechanical characteristics of granular filler, an elbow tube with t/D < 0.01 (the ratio of wall thickness to outer diameter) and R/D < 1.5 (the ratio of bending radius to outer diameter) can be formed. To investigate the interaction between thin-wall elbow and granular filler, A 3D FEM-DEM coupling numerical model is developed, which takes into account both the deformation behavior of tubular blank (continuum, finite element method FEM) and mechanical characteristics of granular filler (discrete media, discrete element method DEM). By means of the coupling model, the key forming parameters of an elbow tube such as forming force, wall thickness distribution, wrinkling are simulated and compared to experimental results.
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Metadata
Title
3D FEM-DEM coupling analysis for granular-media-based thin-wall elbow tube push-bending process
Authors
Hai Liu
Shi-Hong Zhang
Hong-Wu Song
Gao-Lian Shi
Ming Cheng
Publication date
28-01-2019
Publisher
Springer Paris
Published in
International Journal of Material Forming / Issue 6/2019
Print ISSN: 1960-6206
Electronic ISSN: 1960-6214
DOI
https://doi.org/10.1007/s12289-019-01473-8

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