Simultaneous mechanical and light microscopic studies of collagen fibers
Simultaneous mechanical and light microscopic studies of collagen fibers
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胶原纤维的同步机械和光学显微镜研究
DOI：
10.1007/bf00519178
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
A. Viidik
中科院分区：
文献类型：
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作者：
A. Viidik
SummaryAn装置，使同时应力-应变记录和形态观察在入射光显微镜的试样表面在拉伸加载过程中描述。从平行的胶原标本（肌腱）的实验结果的报告和行为之间的变化在第一个拉伸加载周期和那些在稳态周期（当塑性和不可逆粘度耗尽）进行了描述。据发现，从形态学的角度来看，应力-应变曲线的“脚趾”部分比可以机械测量的更长，这意味着在施加任何可测量的载荷之前，胶原束的波纹度减小。稳定状态意味着更长的“趾”部分和更好的纤维平行排列，但松弛试样中的波度不会受到重复载荷的干扰。还讨论了肌腱的功能范围，以及扭伤现象和预应力的可能性。
SummaryAn apparatus that enables simultaneous stress-strain recording and morphological observation in incidental light microscopy of a specimen surface during tensile loading is described. Results from experiments on parallel-fibred collagenous specimens (tendons) are reported and variations between behavior during the first tensile loading cycle and those in the steady-state cycles (when the plasticity and irreversible viscosity are exhausted) are described. It is found that the “toe” part of the stress-strain curve is longer from a morphological point of view than can be mechanically measured, which means that the waviness of the collagenous bundles is diminished before any measurable load is applied. The steady state means an even longer such “toe” part and a better parallel arrangement of the fibers but the waviness in the relaxed specimen cannot be disturbed by repeated loadings. The functional range of a tendon is also discussed as are the phenomenon of spraining and the possibility of pre-stress.