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Vol.22, No.2, 2022, pp. 151–158 |
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EFFECT OF STRESS-FREQUENCY INTERACTION ON THE FATIGUE BEHAVIOUR OF HDPE MATERIAL M.A. Ouari1, Abdelkader Djebli2, Abdelkader Miloudi1, Mostefa Bendouba2*, Abdelkrim Aid2*, Sahnoun Zengah2, Abdelghani Baltach2, Abderrahim Talha3 1) University of Djillali Liabes, Laboratory of Materials and Reactive Systems (LMSR), Sidi Bel Abbès, ALGERIA 2) Laboratory of Physic Quantum of Matter and Mathematical Model, University of Mascara, Mascara, ALGERIA email: bendoubamos@yahoo.fr , aid_abdelkrim@yahoo.com 3) Haute Ecole d’Ingénieurs Lille, FRANCE
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Abstract In this experimental study, the influence of test frequency and applied stress on the evolution of dissipated energy and number of cycles is studied. This made it possible to optimise these parameters to achieve a long service life by minimizing the dissipated energy while maximizing the frequency of the test. An experimental design is used to establish and validate a predictive model of energy and the corresponding number of cycles using response surface methodology (RSM). Two inputs, namely frequency and applied stress are considered as input parameters, and number of cycles and dissipated energy are treated as the outputs. For this, an analysis of charge-discharge loops is carried out and the values of dissipated energy included in these loops are determined. Based on these energies obtained for different stress amplitudes and frequencies, mathematical models have been proposed which estimate the corresponding number of cycles as well as the dissipated energy. Thus, it has been shown that the parameters most influencing the cyclic behaviour of the studied HDPE are in order: the stress amplitude and frequency. The interaction study made it possible to find combinations of these factors for a given number of cycles. Keywords: fatigue, cyclic behaviour, frequency, stress amplitude, dissipated energy, high density polyethylene (HDPE) |
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