Fluid pressure response in poroelastic materials subjected to cyclic loading
Fluid pressure response in poroelastic materials subjected to cyclic loading
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DOI：
10.1016/j.jmps.2009.08.002
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发表时间：
2009-11-01
影响因子：
5.3
通讯作者：
Hojo, Masaki
中科院分区：
文献类型：
--
作者：
Kameo, Yoshitaka;Adachi, Taiji;Hojo, Masaki
当对多孔弹性材料施加循环载荷时，在稳态之前会出现间隙流体压力的瞬态阶段。在每个阶段，流体压力都表现出特有的机械行为。在这项研究中，提出了基于多孔弹性的二维多孔弹性材料中流体压力的解析解，假设该材料是各向同性的，在循环轴向和弯曲载荷下。获得的解析解包含瞬态和稳态响应。这两者都取决于三个无量纲参数：无量纲应力系数；无量纲频率；以及，轴向弯曲载荷比。我们特别关注间隙流体压力随无量纲频率和轴向弯曲载荷比变化的瞬态行为。瞬态特性，如半值周期和贡献因子，很大程度上取决于无量纲频率，并在其值约为10时出现峰值。这表明，在这些条件下，瞬态响应可以显着影响多孔弹性材料的力学行为。 (C) 2009 Elsevier Ltd. 保留所有权利。
When cyclic loading is applied to poroelastic materials, a transient stage of interstitial fluid pressure occurs, preceding a steady state. In each stage, the fluid pressure exhibits a characteristic mechanical behavior. In this study, an analytical solution for fluid pressure in two-dimensional poroelastic materials, which is assumed to be isotropic, under cyclic axial and bending loading is presented, based on poroelasticity. The obtained analytical solution contains transient and steady-state responses. Both of these depend on three dimensionless parameters: the dimensionless stress coefficient; the dimensionless frequency; and, the axial-bending loading ratio. We focus particularly on the transient behavior of interstitial fluid pressure with changes in the dimensionless frequency and the axial-bending loading ratio. The transient properties, such as half-value period and contribution factor, depend largely on the dimensionless frequency and have peak values when its value is about 10. This suggests that, under these conditions, the transient response can significantly affect the mechanical behavior of poroelastic materials. (C) 2009 Elsevier Ltd. All rights reserved.