Böl Markus, Ehret Alexander E, Leichsenring Kay, Ernst Michael
Institute of Solid Mechanics, Technische Universität Braunschweig, 38106 Braunschweig, Germany.
Institute of Mechanical Systems, ETH Zurich, 8092 Zurich, Switzerland.
J Biomech. 2015 Apr 13;48(6):1092-8. doi: 10.1016/j.jbiomech.2015.01.024. Epub 2015 Jan 28.
In this study, porcine tendon tissue was tested with a dedicated semi-confined compression set-up that enables us to induce states of either fibrils in compression (mode I), tension (mode II) or at constant length (mode III), respectively. The results suggest that tendon tissue is compressible and demonstrates a significantly stiffer response in mode I than in mode III. This implies that the fibril direction remains the axis of transverse isotropy in compression and that it provides an anisotropic contribution to the tissue stress. These results, which are important for the development of constitutive models for tendon tissue, are discussed with respect to the hierarchical structure of the extracellular matrix.
在本研究中，使用专门的半约束压缩装置对猪肌腱组织进行测试，该装置使我们能够分别诱导出原纤维处于压缩状态（模式I）、拉伸状态（模式II）或恒定长度状态（模式III）。结果表明，肌腱组织是可压缩的，并且在模式I下的响应比模式III下明显更硬。这意味着原纤维方向在压缩时仍然是横向各向同性的轴，并且它对组织应力提供各向异性的贡献。这些对于肌腱组织本构模型的发展很重要的结果，根据细胞外基质的层次结构进行了讨论。
