Abstract
This paper presents the multiaxial fatigue life characteristics under random strain loads from rural road load conditions. Random loads during operating conditions cause fatigue failure of automotive components. Uniaxial fatigue analysis is reasonable when the system is in a simple state of loading. However, multiaxial fatigue analysis must be included for material response, such as variation of the principal stress directions associated with random loads. Critical region of the coil spring is assessed based on finite element analysis. Multiaxial strain signals of random road loads were captured at a sampling rate of 500 Hz in 150 s. The time history of rural road load strain signal demonstrates high amplitude on uneven surface roads. Kurtosis and root mean square value is extracted from the multiaxial strain signal to evaluate the statistical characteristic of the signal. Fatigue life is assessed using the Brown-Miller, Fatemi–Socie, and Wang-Brown strain-life models. The fatigue life was estimated to be 4.32 × 104, 1.39 × 104, and 1.87 × 104 cycles/block for Brown-Miller, Fatemi–Socie, and Wang-Brown, models, respectively. The Brown-Miller model is identified as the suitable model for the predicted fatigue life data, as it has the highest cycles block-to-failure value.
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Acknowledgements
The authors would like to express their gratitude to the Universiti Kebangsaan Malaysia (Research funding: FRGS/1/2019/TK03/UKM/02/1) for the support given for this research.
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Hazmi, N.M., Singh, S.S.K., Abdullah, S., Abdullah, L., Azman, A.H., Rasani, M.R.M. (2022). Characterization of Multiaxial Strain Road Loads in Assessing the Durability of Automotive Coil Spring. In: Lesiuk, G., Duda, S., Correia, J.A.F.O., De Jesus, A.M.P. (eds) Fatigue and Fracture of Materials and Structures. Structural Integrity, vol 24. Springer, Cham. https://doi.org/10.1007/978-3-030-97822-8_11
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DOI: https://doi.org/10.1007/978-3-030-97822-8_11
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