Simulation of a multi-axial loading fatigue test of the rear drive axle of a minivan

DONG Zhichao; WANG Xiaofeng; LOU Weipeng; HUANG Yuanyi; ZHONG Ming

doi:10.16511/j.cnki.qhdxxb.2018.26.004

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Journal of Tsinghua University(Science and Technology) ›› 2018, Vol. 58 ›› Issue (2) : 212-216. DOI: 10.16511/j.cnki.qhdxxb.2018.26.004

AUTOMOTIVE ENGINEERING

Simulation of a multi-axial loading fatigue test of the rear drive axle of a minivan

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Abstract

When a vehicle is running, its suspension is heavily loaded due to the motion. The durability is then one of the key problems in vehicle design. Multi-axial loading laboratory fatigue tests are widely used to shorten the development process, reduce costs and enhance market competitiveness. This paper presents a practical method for simulating multi-axial fatigue tests of a rear axle using a dynamic finite element model of the rear axle and data processing in MATLAB. The simulation of the laboratory fatigue tests includes system identification, calculation of the input dynamic loads for the finite-element model and calculation of the stress-strain response reproduced and compared with the measured stress-strain response. With the errors of less than 5% with the critical fatigue areas in the rear axle located where the section sizes change.

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finite element / multi-axial loading / road simulation / system identification / stress-strain response / critical fatigue areas

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DONG Zhichao, WANG Xiaofeng, LOU Weipeng, HUANG Yuanyi, ZHONG Ming. Simulation of a multi-axial loading fatigue test of the rear drive axle of a minivan[J]. Journal of Tsinghua University(Science and Technology). 2018, 58(2): 212-216 https://doi.org/10.16511/j.cnki.qhdxxb.2018.26.004

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