THE APPARENT VISCOELASTIC BEHAVIOR OF ARTICULAR-CARTILAGE - THE CONTRIBUTIONS FROM THE INTRINSIC MATRIX VISCOELASTICITY AND INTERSTITIAL FLUID-FLOWS
THE APPARENT VISCOELASTIC BEHAVIOR OF ARTICULAR-CARTILAGE - THE CONTRIBUTIONS FROM THE INTRINSIC MATRIX VISCOELASTICITY AND INTERSTITIAL FLUID-FLOWS
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DOI：
10.1115/1.3138591
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发表时间：
1986-05-01
影响因子：
1.7
通讯作者：
MAK, AF
中科院分区：
文献类型：
--
作者：
MAK, AF
将关节软骨模拟为双相多孔粘弹性材料。采用一种特殊的积分型线性粘弹性模型来描述胶原-蛋白多糖基质在剪切作用下的本构关系。对于整体变形，假设矩阵要么是线弹性的，要么是粘弹性的，具有与剪切相同的约化弛豫谱。间隙流体被认为是不可压缩和无粘性的。利用该模型分析了关节软骨在约束压缩条件下的蠕变和速率控制应力松弛实验。利用文献中可获得的材料数据，得出结论：组织间的流体流动和固有的基质粘弹性都对该组织在受限压缩下的表观粘弹性行为有显著的贡献。
Articular cartilage was modeled rheologically as a biphasic poroviscoelastic material. A specific integral-type linear viscoelastic model was used to describe the constitutive relation of the collagen-proteoglycan matrix in shear. For bulk deformation, the matrix was assumed either to be linearly elastic, or viscoelastic with an identical reduced relaxation spectrum as in shear. The interstitial fluid was considered to be incompressible and inviscid. The creep and the rate-controlled stressrelaxation experiments on articular cartilage under confined compression were analyzed using this model. Using the material data available in the literature, it was concluded that both the interstitial fluid flow and the intrinsic matrix viscoelasticity contribute significantly to the apparent viscoelastic behavior of this tissue under confined compression.