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

Abstract

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

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.

Figures/Tables 19

References 21

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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

Research on Collision Analysis and Accuracy Validation of Aluminum Alloy Bumper Based on Chaboche Combined Hardening Model

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