Fatigue damage assessment by considering mean value effect in frequency domain

Hongyan Ding; Qi Zhu; Puyang Zhang

doi:10.1007/s12209-015-2502-0

Transactions of Tianjin University ›› 2015, Vol. 21 ›› Issue (2) : 161 -166. DOI: 10.1007/s12209-015-2502-0

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Fatigue damage assessment by considering mean value effect in frequency domain

Hongyan Ding ¹^,²^,³
, Qi Zhu ³
, Puyang Zhang ¹^,²^,³^,^c

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Abstract

Fatigue damage assessment is carried out considering mean value effect by applying four criteria of failure. Three frequency domain methods, i.e., level crossing counting (LCC), range counting (RC) and a new proposed method, are applied. The core of frequency domain method is the construction of probability density function for the mean stress and stress range of the stress process. The applicability of these frequency domain methods are inspected by comparing with time domain method. Numerical simulations verify the applicability of LCC and the proposed method, while RC gives poor estimations.

Keywords

fatigue / mean value effect / S-N curve / frequency domain / rainflow counting

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Hongyan Ding, Qi Zhu, Puyang Zhang. Fatigue damage assessment by considering mean value effect in frequency domain. Transactions of Tianjin University, 2015, 21(2): 161-166 DOI:10.1007/s12209-015-2502-0

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