Study of bending springback of AZ31B magnesium alloy sheet based on tension–compression asymmetry

IF 2.2 3区工程技术 Q2 MECHANICS

Archive of Applied Mechanics Pub Date : 2025-05-03 DOI:10.1007/s00419-025-02834-3

Rongjun Wang, Hao Su, Pengchong Zhang, Zhibin Yao, Hailian Gui, Zhiquan Huang, Yang Huang

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引用次数: 0

Abstract

Accurately predicting the amount of sheet springback has practical guiding significance for perfecting the bending forming process and improving the accuracy of products, and the special tension–compression asymmetry of magnesium alloy has gradually become a hot issue in the research of magnesium alloy forming process. In this paper, based on the uniaxial tension and compression stress–strain data of AZ31B magnesium alloy in the rolled annealed state at different temperatures, taking into account the tension–compression asymmetry and neutral layer offset during the sheet bending process, a theoretical model of sheet bending springback with high prediction accuracy has been established. The validity of the results obtained from the theoretical model is jointly verified by the sheet bending springback experiments at room temperature and the sheet bending springback simulations at different temperatures using finite element simulation software. The results show that the established theoretical model of sheet bending springback can reliably predict the springback angle of AZ31B magnesium alloy sheet. The springback angle of AZ31B magnesium alloy sheet at room temperature gradually decreases with increasing sheet thickness and bending angle, and the springback angle of sheets with the same thickness gradually decreases with increasing relative bending radius. The springback angle of AZ31B magnesium alloy sheet gradually decreases with increasing temperature.

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基于拉压不对称的AZ31B镁合金板材弯曲回弹研究

准确预测板料回弹量对于完善弯曲成形工艺和提高产品精度具有实际指导意义，镁合金特殊的拉压不对称性也逐渐成为镁合金成形工艺研究中的热点问题。本文基于AZ31B镁合金在不同温度轧制退火状态下的单轴拉伸和压缩应力应变数据，考虑板材弯曲过程中的拉压不对称和中性层偏移，建立了具有较高预测精度的板材弯曲回弹理论模型。通过常温下板料弯曲回弹实验和有限元模拟软件对不同温度下板料弯曲回弹的模拟，共同验证了理论模型结果的有效性。结果表明，所建立的板件弯曲回弹理论模型能够可靠地预测AZ31B镁合金板件的回弹角。AZ31B镁合金板材室温回弹角随板材厚度和弯曲角的增大而逐渐减小，相同厚度板材回弹角随相对弯曲半径的增大而逐渐减小。随着温度的升高，AZ31B镁合金板的回弹角逐渐减小。

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

Archive of Applied Mechanics 物理-力学

CiteScore

4.40

自引率

10.70%

发文量

234

审稿时长

4-8 weeks

期刊介绍： Archive of Applied Mechanics serves as a platform to communicate original research of scholarly value in all branches of theoretical and applied mechanics, i.e., in solid and fluid mechanics, dynamics and vibrations. It focuses on continuum mechanics in general, structural mechanics, biomechanics, micro- and nano-mechanics as well as hydrodynamics. In particular, the following topics are emphasised: thermodynamics of materials, material modeling, multi-physics, mechanical properties of materials, homogenisation, phase transitions, fracture and damage mechanics, vibration, wave propagation experimental mechanics as well as machine learning techniques in the context of applied mechanics.