Residual strains in conduit arteries
Residual strains in conduit arteries
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DOI：
10.1016/s0021-9290(02)00444-x
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发表时间：
2003-05-01
影响因子：
2.4
通讯作者：
Greenwald, SE
中科院分区：
文献类型：
--
作者：
Rachev, A;Greenwald, SE
残余应变和应力是去除所有外部载荷后存在于体内的应变和应力。动脉中的残余应变可以通过扇形横截面的张角来表征，该张角是在径向切割卸载的环段时出现的。介绍并讨论了测量残余应变的实验方法以及张角随动脉定位、年龄、平滑肌活动、机械环境和某些血管病理变化的主要结果。结果表明，除了其既定的均匀化动脉壁应力场的能力外，残余应变还使动脉更加顺应，从而改善其作为弹性储库的性能，并确保平滑肌细胞对动脉管腔进行更有效的局部控制。最后，讨论了在某些情况下，即使在径向切割动脉后残留应变仍保留在动脉中的证据。 (C) 2003 Elsevier Science Ltd. 保留所有权利。
Residual strains and stresses are those that exist in a body when all external loads are removed. Residual strains in arteries can be characterized by the opening angle of the sector-like cross-section which arises when an unloaded ring segment is radially cut. A review of experimental methods for measuring residual strains and the main results about the variation of the opening angle with arterial localization, age, smooth muscle activity, mechanical environment and certain vascular pathologies are presented and discussed. It is shown that, in addition to their well-established ability to homogenize the stress field in the arterial wall, residual strains make arteries more compliant and thereby improve their performance as elastic reservoirs and ensure more effective local control of the arterial lumen by smooth muscle cells. Finally, evidence that, in some cases, residual strains remain in arteries even after they have been cut radially is discussed. (C) 2003 Elsevier Science Ltd. All rights reserved.