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Establishing Energy-Damage Relationship for Fatigue Data Editing of Strain Loading History


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DOI: https://doi.org/10.15866/ireme.v12i7.14426

Abstract


This study presents the fatigue data editing (FDE) technique by establishing the relationship between wavelet energy and damage. Wavelet-energy-based FDE techniques have been widely studied but there is no effective guideline to estimate the energy gate value for extraction of high-energy cycles. Hence, the relationship between wavelet energy and fatigue damage needs to be known to accurately predict the gate value. The strain signal was collected from a car suspension coil spring while the car was being driven in a residential area. Continuous wavelet transform was used to compute the wavelet energy in the signal. An energy–damage relationship was established and a gate value was estimated. The results showed damage retention of 97% and signal length reduction of 95% in the mission signal using the estimated gate value. This indicates that the energy-damage relationship is effective for estimating the energy gate value for FDE. Hence, knowing the energy–damage relationship is important in wavelet-energy-based FDE as a guideline for estimating the energy gate value. This significantly improves the efficiency of the FDE process while reducing the duration of the analysis.
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Keywords


Fatigue Data Editing; Continuous Wavelet Transform; Fatigue Damage; Wavelet Energy

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References


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