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水合粘弹性组织的无侧限压缩：双相多孔粘弹性分析。

Unconfined compression of hydrated viscoelastic tissues: a biphasic poroviscoelastic analysis.

作者信息

Mak A F

出版信息

Biorheology. 1986;23(4):371-83. doi: 10.3233/bir-1986-23406.

DOI:10.3233/bir-1986-23406
PMID:3779062
Abstract

A biphasic poroviscoelastic theory was used to analyze the unconfined compression creep and stress relaxation of a hydrated viscoelastic tissue. The intrinsic shear properties of the tissue matrix was described by an integral-type viscoelastic constitutive law while the intrinsic bulk property of the matrix was assumed to be linearly elastic. Parametric data were presented to show how the two major energy dissipative mechanisms, namely the interstitial fluid flow and the intrinsic matrix viscoelasticity, may each contribute to the apparent viscoelastic behavior of the whole tissue under unconfined compression. The hydraulic permeability of the tissue was found to enter in only as a scaling factor for time.

摘要

采用双相多孔粘弹性理论分析水合粘弹性组织的无侧限压缩蠕变和应力松弛。组织基质的固有剪切特性由积分型粘弹性本构定律描述，而基质的固有体积特性假定为线弹性。给出了参数数据，以显示两种主要的能量耗散机制，即组织间隙流体流动和基质固有粘弹性，如何各自对无侧限压缩下整个组织的表观粘弹性行为做出贡献。发现组织的水力渗透率仅作为时间的比例因子进入分析。

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