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首页> 外文期刊>Journal of Materials Engineering and Performance >Design, Analysis, and Simulated Testing of a Surrogate Nitinol Fatigue Specimen
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Design, Analysis, and Simulated Testing of a Surrogate Nitinol Fatigue Specimen

机译：替代镍钛诺疲劳试样的设计，分析和模拟测试

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摘要

Endurance limit analysis and testing require an accurate determination of the strain environment a device experiences in its life cycle (crimp strains, mean strain, and strain amplitudes) as well as the strain capability of the processed device. Surrogate fatigue specimens that represent a critical portion of a device can be designed through finite element analysis to experience the requisite strain life cycle, and in addition, can be efficiently tested to failure in a controlled strain environment. The surrogate should be processed in a similar manner as the parent device to ensure accurate material micro-structural properties as well as surface finish characteristics. In this article, we present the design, analysis, and simulated testing of a fatigue test specimen to determine a fatigue endurance limit to be used in the design assessment of a medical device. The Neyer D-Optimal sensitivity test method was used in a simulation to construct a design envelope.
机译：耐久性极限分析和测试需要准确确定设备在其生命周期中所经历的应变环境（压接应变，平均应变和应变幅度）以及已处理设备的应变能力。可以通过有限元分析来设计代表设备关键部分的替代疲劳样本，以体验必要的应变生命周期，此外，可以在受控应变环境中有效地测试其失效。替代物的处理方式应与父代装置相似，以确保准确的材料微观结构特性以及表面光洁度特性。在本文中，我们介绍了疲劳测试样本的设计，分析和模拟测试，以确定用于医疗设备设计评估的疲劳极限。在仿真中使用了Neyer D-Optimal灵敏度测试方法来构建设计包络线。

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