Published 4 issues per year
ISSN Print: 2152-2057
ISSN Online: 2152-2073
Indexed in
FATIGUE LIFE PREDICTION FOR COMPOSITE MATERIALS UNDER ERGODIC GAUSSIAN AND STATIONARY RANDOM (EGSR) LOADS
ABSTRACT
In this paper, fatigue damage predictions by six models were compared with three-point bending experimental results carried out on composite materials subjected to an ergodic Gaussian and stationary random (EGSR) signal. Due to the complexity of fracture modes and their interactions, we have focused on the delamination failure mode. So, the dimensions of specimens were chosen in order to have only interlaminar delamination. All six models rely on one constant amplitude fatigue test at the load ratio r = (Fmin/Fmax) = 0.1. The first model is based on degradation of the global stiffness, while the second is based on assessing the expectation of damage defined by the Palmgreen–Miner law and the other four models studied are also based on the cumulative damage rule of Palmgreen–Miner combined with the rain flow cycle counting algorithm. The best model found is used to determine a set of data that will be used to construct an empirical model of prediction of fatigue life depending only on the average load and standard deviation of spectrum loading in addition to some material parameters and its F–N curve (load–life curve) constants.
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Bousfia Mohammed, Aboussaleh Mohammed, Ouhbi Brahim, Hybrid Damage Prediction Procedure for Composite Laminates Submitted to Spectra Loading, WSEAS TRANSACTIONS ON APPLIED AND THEORETICAL MECHANICS, 15, 2021. Crossref
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Bousfia Mohammed, Aboussaleh Mohammed, Ouhbi Brahim, Hybrid Damage Prediction Procedure for Composite Laminates Submitted to Spectra Loading, WSEAS TRANSACTIONS ON APPLIED AND THEORETICAL MECHANICS, 15, 2021. Crossref