Abstract
This paper aims to characterize strain signals acquired at an automotive coil spring. The strain signals were caused by vibrations of the tire while the car was being driven on various types of road surfaces at different speeds. The rural road gave high amplitudes containing spikes when the tire touched a curb, bump or pothole. These conditions contributed to a higher loading rate to the car component, contributing to shorter useful life, which was 1,926, 1,574 and 1,401 reversals of blocks for the Coffin-Manson, Morrow and SWT models, respectively. Driving on the rural road resulted in a 6-times and 8-times decrease in the useful life of the coil spring in comparison to the urban and the highway roads, respectively. In conclusion, the rural road caused stronger vibrations to the component because it has a rough surface; meanwhile, the highway road provided lower vibrations because the road was smooth. Damage due to fatigue increases with the vibrations subjected to a component leading to fracture.
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