Laboratory of Mechanics, Aristotle University of Thessaloniki, 54-124 Thessaloniki, Greece.
J Mater Sci Mater Med. 2011 Jun;22(6):1375-81. doi: 10.1007/s10856-011-4320-9. Epub 2011 May 10.
The mechanical properties of collagenous tissues, such as tendon and ligaments, are of particular interest as they are found extensively in the human body. In the present study the transverse mechanical properties of collagen fibers are reported for the first time. The elastic modulus was found to be 63 ± 4 MPa, while the viscosity was estimated to be 14 GPa ≤ η ≤ 56 GPa s. Comparison with similar data in the literature, for bulk tendon and collagen fibrils, suggests that the apparent modulus of a network of interconnected building blocks is reduced as compared to the modulus of the individual building blocks; in particular E (tendon) < E (fiber) < E (fibril); this is due to the fact that as the scale of the microstructure increases (i) slippage and sliding between the respective building blocks (fibrils or fibers) increases, (ii) the volume fraction of the stiff collagen proteins decreases.
胶原组织（如肌腱和韧带）的力学性能特别重要，因为它们在人体中广泛存在。本研究首次报道了胶原纤维的横向力学性能。发现其弹性模量为 63 ± 4 MPa，而黏度估计为 14 GPa ≤ η ≤ 56 GPa s。与文献中类似的肌腱和胶原原纤维的整体数据相比，这表明与单个构建块的模量相比，相互连接的构建块网络的表观模量降低；具体而言，E（肌腱）<E（纤维）<E（原纤维）；这是由于随着微观结构的尺度增加（i）各构建块（原纤维或纤维）之间的滑动和滑动增加，（ii）刚性胶原蛋白的体积分数减少。
