Accession Number : AD0695776

Title :   FRACTURE OF ROCK DUE TO HIGH PRESSURE, SHORT DURATION LOADINGS.

Descriptive Note : Technical rept.,

Corporate Author : HYDRONAUTICS INC LAUREL MD

Personal Author(s) : Van Dyke,P. ; Conn,A. F. ; Dagen,G.

Report Date : SEP 1969

Pagination or Media Count : 18

Abstract : The results of a preliminary theoretical and experimental research program investigating the dynamic fracture of rock due to high pressure, short duration loadings are presented. Efforts were centered on hypothesizing a dynamic failure mechanism and verifying this model by a small number of laboratory experiments. The model proposed is one where the statistical stress distribution accounts for the initiation of failure events and the duration of the stress determines the coalescence of these failure events into failure surfaces. The experimental program defined the regimes in which stress and geometric parameters affect the dynamic failure; very general correlation between the experiments and theory was possible. (Author)

Descriptors :   (*NUCLEAR EXPLOSIONS, ROCK), (*ROCK, FRACTURE(MECHANICS)), LOADS(FORCES), PRESSURE, SHOCK WAVES, FAILURE(MECHANICS), STRESSES, MATHEMATICAL MODELS, STATISTICAL ANALYSIS, CRACKS, PARTICLE SIZE, MICROPHOTOGRAPHY, TENSILE PROPERTIES, DEFORMATION

Subject Categories : Geology, Geochemistry and Mineralogy
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE