A biphasic and transversely isotropic mechanical model for tendon: application to mouse tall fascicles in uniaxial tension
A biphasic and transversely isotropic mechanical model for tendon: application to mouse tall fascicles in uniaxial tension
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DOI：
10.1016/j.jbiomech.2003.10.007
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发表时间：
2004-06-01
影响因子：
2.4
通讯作者：
Elliott, DM
中科院分区：
文献类型：
--
作者：
Yin, LH;Elliott, DM
将横观各向同性两相混合物模型应用于单轴拉伸下的钢筋束。进行参数分析，并在预测材料参数的灵敏度进行了评价。我们的研究结果提供了定量的证据流体流动的机制，有助于肌腱粘弹性。计算小鼠尾腱束的横向各向同性材料特性。平均横向模量（E-1）为0.046 MPa，纤维排列的泊松比（nu（31））为2.73，横向泊松比（nu（21））为0.96;这些性能不依赖于应变。纤维取向模量（E-3）是应变依赖性的，并且在趾部区域中为20.7MPa，在线性区域中为86.1MPa。这些固体基质性质与先前发表的肌腱组织和肌束数据一致。纤维束渗透性是应变依赖性的，在趾部区域为5.5 x 10（-18）m（4）/N s，在线性区域为0.32 x 10（-18）m（4）/N s，与先前报道的张力下半月板渗透性相似。纤维束和组织水平样品的相似渗透性表明，来自单个纤维束的流体流动，而不是多个纤维束的包装在一起，可能是肌腱中流体流动的主要障碍，因此是粘弹性的主要机制。(C)2003 Elsevier Ltd.保留所有权利。
A transversely isotropic biphasic mixture model was applied to tendon in uniaxial tension. Parametric analyses were performed and the sensitivity in predicting material parameters was evaluated. Our results provide quantitative evidence for fluid flow as a mechanism that contributes to tendon viscoelasticity. Transversely isotropic material properties were calculated for mouse tail tendon fascicles. The average transverse modulus (E-1) was 0.046 MPa, the fiber-aligned Poisson's ratio (nu(31)) was 2.73, and the transverse Poisson's ratio (nu(21)) was 0.96; these properties were not strain-dependent. The fiber-aligned modulus (E-3) was strain-dependent and was 20.7 MPa in the toe region and 86.1 MPa in the linear region. These solid matrix propel-ties were consistent with previously published tendon tissue and fascicle data. The fascicle permeability was strain-dependent and was 5.5 x 10(-18)m(4)/N s in the toe region and 0.32 x 10(-18)m(4)/N s in the linear region, similar to previously reported meniscus permeability in tension. The similar permeabilities of both fascicle and tissue-level samples suggest that fluid flow from individual fascicles, not the packing of multiple fascicles together, may be the primary barrier to fluid flow in tendon and thus the primary mechanism for viscoelasticity. (C) 2003 Elsevier Ltd. All rights reserved.