Accession Number : AD0724914

Title :   Damping by Extended Dislocations,

Corporate Author : ROYAL MILITARY COLL OF CANADA KINGSTON (ONTARIO)

Personal Author(s) : Blair,D. G. ; Hutchison,T. S. ; Rogers,D. H.

Report Date : 13 JUL 1970

Pagination or Media Count : 17

Abstract : A model in which an extended dislocation jumps about a pinning agent (discussed previously by Blair et al.) gives rise to damping and modulus defect terms. These are calculated for dislocation loops of constant length and for an exponential distribution of loop lengths. The variation of damping and modulus defect with applied cyclic stress and with temperature are deduced and compared with the behavior of a Granato-Lucke breakaway model. The above terms are also calculated for the general problem in which a system 'jumps' between two potential wells. (Author)

Descriptors :   (*DEFORMATION, THEORY), (*DISLOCATIONS, MOTION), DAMPING, CREEP, STRESSES, TEMPERATURE, CANADA

Subject Categories : Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE