Accession Number : AD0681939

Title :   EFFECT OF STRAIN RATE ON THE DEFORMATIONAL BEHAVIOR OF ROCK.

Descriptive Note : Final rept. 28 Dec 64-27 Dec 67,

Corporate Author : COLUMBIA UNIV NEW YORK

Personal Author(s) : Donath,Fred A.

Report Date : 30 DEC 1968

Pagination or Media Count : 15

Abstract : Experimental results for four different rock types in which the microscopic mechanisms of deformation vary in their contribution to the total deformation indicate that cataclastic deformation is independent of time. It appears that the physical behavior of materials deforming cataclastically can thus be evaluated in terms of pressure and temperature alone. The magnitude of previous strain affects the elastic moduli, ductility, and strength of a rock subjected to later deformation, but the effect depends largely on the conditions of the later deformation--in particular, on the confining pressure and orientation of the principal stresses. (Author)

Descriptors :   (*ROCK, DEFORMATION), STRAIN(MECHANICS), PRESSURE, ELASTIC PROPERTIES, STRESSES, DUCTILITY, TEMPERATURE, LIMESTONE, SURFACE PROPERTIES, FRACTURE(MECHANICS), SANDSTONE, METAMORPHIC ROCK, SEDIMENTARY ROCK, COMPRESSIVE PROPERTIES

Subject Categories : Geology, Geochemistry and Mineralogy
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE