Determination of Test Needs for the Prime ARGUS Program
SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA
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A series of spherical one-dimensional computer code calculations was performed to assess the effects of mechanical material property parameters on wave propagation in dry porous and compacted tuff. Peak stress attenuation was found to be most sensitive to initial porosity. In compacted material peak stress attenuation was found to be more sensitive to the shear modulus than to the yield strength. Increasing hoop tensile stresses occurred with increasing yield strength. Introduction of a hoop tensile fracture criterion did not affect peak stress attenuation but did affect the radial displacement. Generally, radial displacements of particles at the same initial radius from the source increased with increasing porosity. Shock wave arrival times at various distances from the source increased with increasing porosity.
- Soil Mechanics