The shape-memory effect and superelasticity properties of NiTinol alloys make them a versatile candidate for various engineering and biomedical applications. The use of these alloys as biomedical implants necessitates the study of any long-term creep failure possibility. The present study utilizes the finite element method to investigate this creep behavior of NiTinol alloys under static and dynamic loading conditions over a long period. The Maxwell creep model has been implemented, as well as validated with the polypropylene and low-density polyethylene. Further, the same model has been utilized for the creep analysis of NiTinol with suitable material properties and assumptions, for a time of 10,000 h. The results demonstrated the application of sinusoidal varying loads, the creep strain observed was lower as compared to other loading conditions, and in the case of static load, higher creep strain values were experienced than that of the dynamic smooth step loading case.

NiTinol合金的形状记忆效应和超弹性特性使其成为各种工程和生物医学应用的多功能候选者。将这些合金用作生物医学植入物需要研究任何长期的蠕变破坏可能性。本研究利用有限元方法研究了镍钛诺合金在静态和动态载荷条件下的长期蠕变行为。已实施麦克斯韦蠕变模型，并已使用聚丙烯和低密度聚乙烯进行了验证。此外，在适当的材料特性和假设下，相同的模型已用于NiTinol的蠕变分析，时间为10,000 h。结果表明施加正弦变化载荷，与其他载荷条件相比，观察到的蠕变应变更低，