Dunn M G, Silver F H
Connect Tissue Res. 1983;12(1):59-70. doi: 10.3109/03008208309005612.
Stress-relaxation tests were performed at successive strain levels on strips of human aorta, skin, psoas tendon, dura mater, and pericardium. The elastic fraction, the equilibrium force divided by the initial force, was calculated at each strain increment. In the aorta, the elastic fraction decreased with strain and was modeled as the transfer of stress from elastic to collagen fibers, while in skin it increased with strain, probably due to the rearrangement of individual collagen fiber orientations, resulting in an aligned collagen network at high strains. The strain-independent elastic fractions for tendon, dura mater, and pericardium were similar, and approximately equal to the values found for aorta and skin at high strains. It was hypothesized that the elastic fraction is related to the type of fiber loaded, and the tissue geometry. This analysis may be useful in studying disease-induced changes in the mechanical properties of connective tissues.
在连续的应变水平下，对人主动脉、皮肤、腰大肌肌腱、硬脑膜和心包的条带进行了应力松弛测试。在每个应变增量处计算弹性分数，即平衡力除以初始力。在主动脉中，弹性分数随应变降低，其模型为应力从弹性纤维向胶原纤维的转移，而在皮肤中，弹性分数随应变增加，这可能是由于单个胶原纤维取向的重新排列，导致在高应变时形成排列整齐的胶原网络。肌腱、硬脑膜和心包的应变无关弹性分数相似，且大致等于在高应变时主动脉和皮肤的弹性分数值。据推测，弹性分数与加载纤维的类型以及组织几何形状有关。该分析可能有助于研究疾病引起的结缔组织力学性能变化。
