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Effects of temperature and stress level on creep and tensile property of polypropylene sutures

机译：温度和应力水平对聚丙烯缝合线蠕变和拉伸性能的影响

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An investigation was conducted on creep behaviors of polypropylene sutures under different temperatures and stress levels in a temperature-controlled water bath. The study showed that temperature and stress level significantly affected the creep behaviors of the sutures. High temperature and stress level resulted in large creep and permanent deformation to the sutures. The creep data could be well described by an empirical formula. For most of the test conditions, the creep tests caused limited permanent deformation in sutures. Dependency of the permanent deformation on temperature may be illustrated by an Arrhenius-type equation. The tensile properties of the sutures were not adversely affected by a short-term creep test, indicating good mechanical performance for the polypropylene sutures. For the creep experiment of less than 3 h, the creep rupture of the sutures was observed at a stress level of 220 MPa and temperatures greater than or equal to37degreesC. (C) 2003 Wiley Periodicals, Inc. [References: 16]
机译：在温度控制的水浴中，研究了聚丙烯缝合线在不同温度和应力水平下的蠕变行为。研究表明，温度和应力水平显着影响缝线的蠕变行为。高温和高应力水平导致缝线大蠕变和永久变形。蠕变数据可以用经验公式很好地描述。在大多数测试条件下，蠕变测试在缝线中造成有限的永久变形。永久变形对温度的依赖性可以通过阿伦尼乌斯型方程来说明。短期蠕变测试未对缝合线的拉伸性能产生不利影响，表明聚丙烯缝合线具有良好的机械性能。对于少于3 h的蠕变实验，在220 MPa的应力水平和大于或等于37摄氏度的温度下观察到了缝线的蠕变破裂。 （C）2003 Wiley Periodicals，Inc. [参考：16]

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