Accession Number : AD0482661

Title :   AN INVESTIGATION OF THE DYNAMIC BEHAVIOR OF A PARTIALLY SATURATED SILT WITH APPLICATIONS TO SHOCK-WAVE PROPAGATION.

Descriptive Note : Technical rept. Dec 64-Mar 65,

Corporate Author : NEW MEXICO UNIV ALBUQUERQUE ERIC H WANG CIVIL ENGINEERING RESEARCH FACILITY

Personal Author(s) : Calhoun, Delmar E. ; Kraft, David C.

Report Date : MAY 1966

Pagination or Media Count : 84

Abstract : Computations relating to wave propagation through soil are dependent on adequate methods of determining the necessary soil parameters. To study methods of obtaining these parameters, static and dynamic, one-dimensional compression, triaxial, and rod-vibration tests were performed on silt specimens compacted at moisture contents of 8, 12, and 14%. The initial static pressure was varied to simulate an increase in geostatic stress with depth. Pressures of 15, 45, 75, and 100 psi were used as initial static surcharge pressures in the dynamic, one-dimensional tests, and as confining pressures in the triaxial tests. The results are presented in the form of stress-strain and moduli plots with comparisons between the various test methods. Based on experimental results, a model was proposed for representing the stress-strain relationship of soils during locking behavior. This model, together with the equation of momentum and the shock condition, was used to develop the equations governing stress attenuation, shock-front velocity, and shock location in a nonlinear medium. A parametric study of stress attenuation with depth was conducted to illustrate the significance of the method of analysis. (Author)

Descriptors :   *SHOCK WAVES, *PROPAGATION, *EXPLOSION EFFECTS, SOILS, STRUCTURES, AIRBURST, DYNAMICS, STRESSES, STATICS, TEST EQUIPMENT, STAINLESS STEEL, INSTRUMENTATION, MATHEMATICAL MODELS, VIBRATION, SIMULATION, PRESSURE, ATTENUATION, PLASTIC PROPERTIES, LOCKING FASTENER DEVICES, NITROGEN, HIGH PRESSURE VALVES, SOIL MECHANICS.

Subject Categories : Explosions
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE