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首页> 外文期刊>Proceedings of the Institution of Mechanical Engineers. Part L, Journal of Materials: Design and Application >Determination of an average quasi-linear viscoelastic model for the mechanical behavior of rat cervix
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Determination of an average quasi-linear viscoelastic model for the mechanical behavior of rat cervix

机译：鼠颈大鼠力学行为的平均准线性粘弹性模型的测定

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摘要

The objective of this study was to determine an average quasi-linear viscoelastic model for the mechanical behavior of rat cervix. The average model is applicable at defined displacement rates for virgin and pregnant tissues in the last trimester of pregnancy. After preconditioning, the displacement of 2 mm was applied to the distal halves of five pregnant rat's cervices and 1 mm to the five virgin samples circumferentially. Uniaxial tension tests were employed at the displacement rates of 0.01, 0.1 and 1 mm/s randomly and were held for 10 min while the tissues were relaxed. Tensile and load-relaxation curves were well described by a quasi-linear viscoelastic model. Two average quasi-linear viscoelastic models were fitted to all 30 curves obtained from experiments for virgin and pregnant tissues. The average quasi-linear viscoelastic model coefficients were extracted using the average model equations. Cervical tissue is strongly viscoelastic. Determination of an average viscoelastic model of rat cervix may lead to a more precise description of the mechanical behavior of the virgin and pregnant tissues in the assessment of cervical insufficiency.
机译：本研究的目的是确定大鼠子宫颈机械行为的平均准线性粘弹性模型。平均模型适用于怀孕的最后三月段中的处女和怀孕组织的定义位移率。在预处理后，将2mm的位移施加到五个孕妇颈部宫颈的远端半部，并沿周向上达到五个原始样品。单轴张力试验在0.01,0.1和1mm / s的位移速率随机使用，并在组织放松时保持10分钟。通过准线性粘弹性模型很好地描述了拉伸和弛豫曲线。两个平均的准线性粘弹性模型适用于从原始和孕妇组织的实验中获得的所有30条曲线。使用平均模型方程提取平均准线性粘弹性模型系数。宫颈组织强烈粘弹性。大鼠子宫颈的平均粘弹性模型的测定可能导致在宫颈功能不全的评估中更精确描述了处女和孕妇的力学行为。

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