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《应用数学和力学(英文版)》 2002-01
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INSTABILITY AND DISPERSIVITY OF WAVE PROPAGATION ININELASTIC SATURATED/UNSATURATED POROUS MEDIA

LI Xi_kui , ZHANG Jun_bo , ZHANG Hong_wu(State Key Laboratory for Structural Analysis of Industrial Equipment, Dalian University of Technology, Dalian 116024, P R China)(Communicated by TANG Li_min)  
A model based on the Biot theory for simulating coupled hydro_dynamic behavior in saturated_unsaturated porous media was utilized with integration of the inertial coupling effect between the solid_fluid phases of the media into the model. Stationary instability and dispersivity of wave propagation in the media in one_dimensional problem were analyzed. The effects of the following factors on stationary instability and dispersivity were discussed. They are the viscous and inertial couplings between the solid and the fluid phases, compressibility of the mixture composed of solid grains and pore fluid, the degree of saturation, visco_plastic (rate dependent inelastic) constitutive behavior of the solid skeleton under high strain rate. The results and conclusion obtained by the present work will provide some bases or clues for overcoming the difficulties in numerical modelling of wave propagation in the media subjected to strong and shock loading.
【Fund】: theNationalNaturalScienceFoundationofChina ( 1 983 2 0 1 0 )
【CateGory Index】: O357.3
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【Co-references】
Chinese Journal Full-text Database 10 Hits
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