文献类型：期刊文献

中文题名：热局部非平衡条件下含柱形空洞横观各向同性饱和多孔介质的热应力分析

英文题名：Thermal Stresses around a Cylindrical Hole in a Transversely Isotropic Poroelastic Medium Considering Local Thermal Non-Equilibrium

作者：戴清晨[1];何录武[1]

机构：[1]华东理工大学机械与动力工程学院,上海200237

年份：2014

卷号：35

期号：1

起止页码：1

中文期刊名：力学季刊

外文期刊名：Chinese Quarterly of Mechanics

收录：CSTPCD;;北大核心:【北大核心2011】；CSCD:【CSCD2013_2014】；

语种：中文

中文关键词：饱和多孔介质;横观各向同性;热局部非平衡;Laplace变换;孔隙压力;热应力

外文关键词：saturated porous medium; transversely isotropic; local thermal non-equilibrium; Laplace transform; pore pressure;thermal stress

摘要：提出了一个热局部非平衡条件下横观各向同性多孔介质的弹性力学模型,研究了含柱形空洞的无限大多孔介质在冷对流边界条件下的孔隙压力和固相热应力.应用Laplace变换反演法数值分析了热局部非平衡及材料的各向异性对孔隙压力和固相热应力的影响.结果表明:孔隙压力和固相热应力随着横向热膨胀系数的增大而显著增大,而弹性模量的各向异性对孔隙压力和固相热应力的影响则是微弱的.同时,结果还证实了在Biot数为中等值范围内,热局部非平衡效应是非常明显的.
A local thermal non-equilibrium （LTNE） poroelasticity model for transversely isotropic porous media was presented. The thermally induced pore pressure and thermal stresses around a cylindrical hole in an infinite porous medium subjected to convective cooling on the boundary of the cavity was investigated. The LTNE thermo-poroelasticity equations were solved using Laplace transform and numerical examples were presented to examine the effects of LTNE and material anisotropy on the pore pressure and thermal stresses around the cavity. The results show that the thermal pore pressure and the magnitudes of thermal stresses increase significantly with an increase in the thermal expansion coefficient in the transverse direction. However, the elastic modulus anisotropy alone has only a marginal effect on the thermal pore pressure and stresses. The results also confirm that the LTNE effects become more pronounced when the convective heat transfer boundary conditions with moderate Biot numbers are considered.