Experiments and simulations of bimetal drum brakes at high temperature conditions

doi:10.3969/j.issn.1674-8484.2021.02.004

Abstract

Abstract:

A bench test was carried out at high temperature working conditions of nearly 500 ℃ for a bimetal drum brake of a heavy truck to explore the dynamic characteristics in the working process of the brake. Measured the dynamic strains and the dynamic temperature properties for the brake during braking. Conducted thermal-stress-wear coupling analysis by using a finite element (FE) software ABAQUS. The results show that the circumferential strain on the brake drum outer surface exhibits an approximately periodic alternating characteristic. The circumferential direction is the main deformation direction of the brake drum, and the maximum circumferential stress appears at the opening edge. The friction lining wear distribution is extremely uneven. These results verify the good accuracy of the bimetal drum brake FE model, which can be used as a basis of the failure analysis and structural optimization for bimetal drum brakes.

Key words: vehicle safety, bimetal drum brake, high temperature conditions, dynamic strain, dynamic temperature, finite element (FE) software

CLC Number:

U467.5+23

BIAN Jiang, WANG Xiaoying, GUI Liangjin, FAN Zijie. Experiments and simulations of bimetal drum brakes at high temperature conditions[J]. Journal of Automotive Safety and Energy, 2021, 12(2): 173-179.

Figures/Tables 17

References 13

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工况	转动惯量	初始温度	初始速度	制动气压
工况	t·m²	℃	km·h^-1	MPa
紧急制动	1.475	80	60	1.00
加速疲劳	2.650	100	120	0.40

工况	转动惯量	初始温度	初始速度	制动气压
工况	t·m²	℃	km·h^-1	MPa
紧急制动	1.475	80	60	1.00
加速疲劳	2.650	100	120	0.40

温度	比热容	导热系数	线膨胀系数	弹性模量	密度	Poisson比
℃	kJ·（kg·K） ^-1	W·（m·K） ^-1	10^-6 K ^-1	GPa	kg·m ^-3	Poisson比
20	0.855	3.20	8.64	11.7	2 056	0.27
100	1.012	3.18	17.56	10.0	--	--
200	1.239	3.19	29.69	4.3	--	--
300	1.124	2.61	12.00	2.7	--	--

温度	比热容	导热系数	线膨胀系数	弹性模量	密度	Poisson比
℃	kJ·（kg·K） ^-1	W·（m·K） ^-1	10^-6 K ^-1	GPa	kg·m ^-3	Poisson比
20	0.855	3.20	8.64	11.7	2 056	0.27
100	1.012	3.18	17.56	10.0	--	--
200	1.239	3.19	29.69	4.3	--	--
300	1.124	2.61	12.00	2.7	--	--

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