基于Chaboche混合硬化模型的铝合金保险杠碰撞分析及准确性研究

doi:10.19562/j.chinasae.qcgc.2025.10.014

摘要/Abstract

摘要：

本文旨在探究Chaboche混合硬化模型在铝合金保险杠横梁碰撞响应预测中的性能。为此，本文通过准静态/动态拉伸试验及循环三点弯曲试验，系统分析6082-T6铝合金的力学性能，并完成Johnson-Cook模型和Chaboche混合硬化模型的参数标定。基于100%重叠率台车正面碰撞试验，构建了铝合金保险杠的有限元模型，对比研究不同材料模型对碰撞响应预测的差异。结果表明：两种模型均能有效模拟结构变形特征，但引入运动硬化机制的Chaboche混合硬化模型相较于Johnson-Cook模型，其预测的最大塑性变形量增加6.4%，更接近试验结果。在加速度响应预测方面，Johnson-Cook模型的预测值与试验值存在明显的幅值误差，而Chaboche混合硬化模型的预测值则与试验值吻合较好，误差均小于10%。研究表明，引入运动硬化模型来考虑实际碰撞问题中的复杂加载条件是具有一定意义的。

关键词: 6082-T6铝合金, Chaboche混合硬化模型, 碰撞模拟, 试验研究

Abstract:

The purpose of this study is to investigate the performance of Chaboche combined hardening model in crash simulation of aluminum alloy bumper beam. Therefore， in this study the mechanical properties of 6082-T6 aluminum alloys are systematically analyzed through quasi-static/dynamic tensile tests and cyclic three-point bending tests， and parameter calibration is conducted for the Johnson-Cook model and the Chaboche combined hardening model. Based on a 100% overlap sled frontal impact test， a finite element model of the aluminum alloy bumper is constructed， and the differences in collision response prediction between different material models are compared. The results show that both models can effectively simulate the structural deformation characteristics. However， the Chaboche combined hardening model shows a 6.4% increase in the predicted maximum plastic deformation compared to the Johnson-Cook model， which is closer to the experimental results. Regarding acceleration response prediction， the Johnson-Cook model exhibits a significant amplitude error when compared to the experimental data， while the predicted value of Chaboche combined hardening model is in good agreement with the experimental value， with an error of less than 10%. The study shows that introducing the kinematic hardening model to account for the complex loading conditions in actual collision problems is meaningful.

Key words: 6082-T6 aluminum alloy, Chaboche combined hardening model, collision simulation, experimental research

孔德瑜,孟德建,高云凯. 基于Chaboche混合硬化模型的铝合金保险杠碰撞分析及准确性研究[J]. 汽车工程, 2025, 47(10): 1985-1993.

Deyu Kong,Dejian Meng,Yunkai Gao. Research on Collision Analysis and Accuracy Validation of Aluminum Alloy Bumper Based on Chaboche Combined Hardening Model[J]. Automotive Engineering, 2025, 47(10): 1985-1993.

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编号	幅值/mm	速率/（mm·s^-1）	编号	幅值/mm	速率/（mm·s^-1）
A1	5	0.1	A2	5	1
A3	5	10	A4	10	0.1
A5	10	1	A6	10	10
A7	15	0.1	A8	15	1
A9	15	10