Creep failure of HMPE ropes is a major concern for the application of HMPE ropes in deepwater moorings. Hence, the creep and creep-rupture behaviors of HMPE samples were systematically investigated by utilizing a special experimental set-up. The procedure and techniques for performing creep-rupture tests of HMPE samples were proposed in detail, which can be a reference for other sizes of synthetic fiber ropes. The test results illustrated that the completed creep-rupture curves include the primary, secondary and tertiary creep stages. To simulate the test results of HMPE samples, a viscoelastic, viscoplastic and viscodamage model was developed based on thermodynamics and a method for identifying the model parameters was proposed in detail. Moreover, the comparison of the model predictions with test data at different loading levels was performed and it showed satisfactory agreement, which means the present model can well simulate creep-rupture behaviors of HMPE samples. The present study helps to improve the understanding of creep-rupture behaviors of HMPE ropes for deepwater moorings.
Ocean Engineering – Elsevier
Published: Aug 15, 2018
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