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Jack Dvorkin


Click on the titles below to find US government-authored or -collected reports written by Jack Dvorkin

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Penetrator Resistance and Target Damage Due to Multiple Impacts upon Granite and Concrete: Joint Experimental, Analytical and Numerical Effoft 23 SEP 1998 39 pages
Authors:  Jack Dvorkin; PETROPHYSICAL CONSULTING REDWOOD CITY CA
The full text of this report is available for sale.The overall objective of the proposed research was to fundamentally and quantitatively understand, based on first physical principles, the micromechanics of penetration into and damage accumulation in cemented particulate targets subject to multiple impact. The approach was to integrate experiments, analytical micromechanics, and numerical modeling into a concerted effort. The project was to be conducted jointly with the University of Rhode Island. The Petrophysical ...


Particulate Systems with Viscous and Viscoelastic Cement: From Contact Laws to Macroscopic Behavior 12 JAN 98 36 pages
Authors:  Jack Dvorkin; STANFORD UNIV CA DEPT OF GEOPHYSICS
The full text of this report is available for sale.The overall objective of the proposed research was to provide a quantitative description of the microstructural, as well as macroscopic mechanical behavior of particulate materials with viscous and viscoelastic intergranular cement. By cement, a material is meant which fills the space between two or more particles at their contacts. The volumetric content of cement in the pore space of an aggregate may vary from zero to 100%. This objective was ...


Cemented Particulate Materials: From Grain-to-Grain Contact to Macro- Behavior 20 APR 96 113 pages
Authors:  Jack Dvorkin; STANFORD UNIV CA DEPT OF GEOPHYSICS
The full text of this report is available for sale.The overall objective of the proposed research was to provide a quantitative description of the microstructural, as well as macroscopic mechanical behavior of particulate materials with intergranular cementation in a wide range of strain amplitudes and for various types of the cementation material. By cementation, a material is meant which fills the space between two surfaces that are (a) separated or (b) contact directly. This objective was achieved by deriving ...


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