Effect of cycle amplitude removal of fatigue strain loadings associated to signal energy characteristics

This research recognizes the impact of lower cycle amplitude discharge on fatigue failure. Here, the strain data were measured at a lower arm when the vehicle was driven at a particular speed on different road surfaces. Thereafter, the strain data in a time domain was transferred to the time-requency domain for determining the wavelet-based signal energies. The lower amplitudes on the strain data were recognized and eliminated according to the wavelet energy. The greater amplitudes were removed and put together to create a refined signal. The extraction algorithm reduced the formal signal by over 33% and was able to preserve about 93.2% of fatigue damage. It was noticed that by employing the wavelet-based energy for removing strain data, there was no serious impact on fatigue life.