Compaction of Dry or Fluid-Filled Porous Materials

by Michael M. Carroll, Prof. of Applied Mechanics; Dept. of Mech. Engrg., Univ. of California, Berkeley, Calif.,

Serial Information: Journal of the Engineering Mechanics Division, 1980, Vol. 106, Issue 5, Pg. 969-990

Document Type: Journal Paper


Constitutive relations are developed for mechanical response of dry or fluid-saturated porous materials beyond the linear range. The main emphasis is on hydrostatic loading and unloading response, although deviatoric effects are also treated. The technique focuses on the manner in which localized shear stresses in the solid material influence the compaction process by changing the porosity. Pore compaction relations are obtained from analysis of the compaction, either static or dynamic, of a hollow sphere. Elastic-perfectly plastic behavior and also strain-hardening and pressure-dependent yielding in the solid material are treated. The theoretical predictions show excellent agreement with experimental data for porous metals and rocks. A theoretical derivation of an initial yield surface for porous materials is also described.

Subject Headings: Porous media | Compaction (material) | Shear stress | Materials processing | Dynamic analysis | Elastoplasticity | Constitutive relations | Linear functions

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