首页   按字顺浏览 期刊浏览 卷期浏览 ACTIVE COOLING AND THERMAL STRESS REDUCTION IN A POROELASTIC HOLLOW SPHERE
ACTIVE COOLING AND THERMAL STRESS REDUCTION IN A POROELASTIC HOLLOW SPHERE

 

作者: Tsuyoshi Kodashima,   Michio Kurasbige,  

 

期刊: Journal of Thermal Stresses  (Taylor Available online 1997)
卷期: Volume 20, issue 3-4  

页码: 389-405

 

ISSN:0149-5739

 

年代: 1997

 

DOI:10.1080/01495739708956109

 

出版商: Taylor & Francis Group

 

数据来源: Taylor

 

摘要:

Using the thermoporoelastic theory previously proposed, thermal stresses are analyzed that are induced in a fluid-saturated poroelastic hollow sphere, whose inner surface is exposed to burning gas and the wall of which is cooled by the fluid injection from its outer surface. Two loading histories are considered: (i) the sphere is subjected to a sudden rise in temperature of the gas and simultaneously pressurized at its outer surface to cool the wall; and (ii) steady-state cooling is abruptly disturbed by a sudden loss of pressurization and, after a while, is recovered. The main focus is on the effect of heat advection due to active fluid injection on the reduction of temperature and thermal stresses. Since the formulated problem is axisymmetric, the displacement field is decoupled from the temperature and pore pressure fields, which are still coupled to each other. The coupled nonlinear diffusion equations are solved by the Crank-Nicolson implicit method. It has been concluded that the active fluid pressurization and injection are effective in suppressing the maximum thermal hoop stress at the outer surface without the occurrence of the excess compressional stress at the inner surface.

 

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