Accession Number : AD0783704

Title :   The Interaction between Line Force Arrays and Planar Cracks.

Descriptive Note : Technical rept.,


Personal Author(s) : Hirth,J. P. ; Hoagland,R. G. ; Gehlen,P. C.

Report Date : JUL 1974

Pagination or Media Count : 17

Abstract : The utility of line force fields in computer simulations of lattice defects is discussed. These fields are shown to provide a facile method for introducing realistic flexible boundary conditions on simulated atomic crystallites. The pertinent elastic fields for line force arrays lying parallel to the tip of a planar crack are presented. The method has been successfully applied to a study of hydrogen embrittlement of alpha-iron. The usage of this type technique is particularly important in the case where nonequilibrium phenomena--such as unstable crack growth--are studied. (Modified author abstract)

Descriptors :   *Crystal defects, *Fracture(Mechanics), Computerized simulation, Iron, Crack propagation, Hydrogen embrittlement

Subject Categories : Metallurgy and Metallography
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE