Research on magnetorheological elastomer assisted flexible multi-point stretch-bending technology

IF 2.6 3区材料科学 Q2 ENGINEERING, MANUFACTURING

International Journal of Material Forming Pub Date : 2024-12-16 DOI:10.1007/s12289-024-01870-8

Ce Liang, Binglong Gao, Songyue Yang, Yu Wen, Yi Li

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引用次数: 0

Abstract

Creasing defects in aluminum profiles post-forming significantly hinder their utilization. This study aimed to mitigate these defects by investigating the causes and mitigating strategies for two types of creases in aluminum profiles formed via flexible stretch bending with roller-type multi-point dies (FSBRD). To achieve dynamic control over the mold surface, magnetorheological elastomers (MREs) were employed to harness their magnetorheological effect, enabling adjustable mold hardness. The adjustable hardness of the mold, enabled by MREs, was investigated under varying magnetic inductions to form T-shaped profiles. The results quantitatively demonstrate that the addition of MREs significantly reduces crease defects, with a minimum value of thick direction strain not exceeding -0.1, and improves moulding quality. Specifically, at a profile thickness of 10mm, an optimal magnetic induction of 200mT minimized crease depth, while for a 66mm thickness, 400mT was most effective. It was also found that increasing the coefficient of friction between the MRE and the contour resulted in a decrease in crease depth and a decrease followed by an increase in crease height. Experimental validation confirmed the simulation accuracy, with thickness trends of the experimentally formed profiles closely matching the simulated ones. The study concludes that the FSBRD-M process is effective in controlling creases and expands the application of MREs in forming technology.

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磁流变弹性体辅助柔性多点拉伸弯曲技术研究

铝型材成形后缺陷的增多严重阻碍了铝型材的使用。本研究旨在通过研究两种类型的折痕的原因和缓解策略，通过柔性拉伸弯曲的铝型材辊型多点模具（FSBRD）形成的缓解这些缺陷。为了实现对模具表面的动态控制，采用磁流变弹性体（MREs）来利用其磁流变效应，实现模具硬度的可调。在不同的磁感应强度下，研究了MREs使模具硬度可调的方法，以形成t型型材。定量结果表明，MREs的加入显著降低了折痕缺陷，厚度方向应变最小值不超过-0.1，提高了成型质量。具体而言，在型材厚度为10mm时，200mT的最佳磁感应强度使折痕深度最小，而在厚度为66mm时，400mT的磁感应强度最有效。增大MRE与轮廓之间的摩擦系数，折痕深度减小，折痕高度先减小后增大。实验验证了仿真的准确性，实验成形的型材厚度变化趋势与仿真结果吻合较好。研究表明，FSBRD-M工艺在控制折痕方面是有效的，扩大了MREs在成形技术中的应用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Material Forming ENGINEERING, MANUFACTURING-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

5.10

自引率

4.20%

发文量

审稿时长

>12 weeks

期刊介绍： The Journal publishes and disseminates original research in the field of material forming. The research should constitute major achievements in the understanding, modeling or simulation of material forming processes. In this respect ‘forming’ implies a deliberate deformation of material. The journal establishes a platform of communication between engineers and scientists, covering all forming processes, including sheet forming, bulk forming, powder forming, forming in near-melt conditions (injection moulding, thixoforming, film blowing etc.), micro-forming, hydro-forming, thermo-forming, incremental forming etc. Other manufacturing technologies like machining and cutting can be included if the focus of the work is on plastic deformations. All materials (metals, ceramics, polymers, composites, glass, wood, fibre reinforced materials, materials in food processing, biomaterials, nano-materials, shape memory alloys etc.) and approaches (micro-macro modelling, thermo-mechanical modelling, numerical simulation including new and advanced numerical strategies, experimental analysis, inverse analysis, model identification, optimization, design and control of forming tools and machines, wear and friction, mechanical behavior and formability of materials etc.) are concerned.