Accession Number : AD0286660

Title :   APPLICATION OF THE PRINCIPLES OF FRACTURE MECHANICS TO RECOILLESS RIFLE PROBLEMS

Corporate Author : ARMY RESEARCH OFFICE WASHINGTON D C

Personal Author(s) : CARMAN,CARL M.

Report Date : DEC 1962

Pagination or Media Count : 1

Abstract : T e basic mathematical model on which fracture mechanics is founded is discussed in some detail. This model assumes infinite strain elasticity, and the crack or flaw is regarded as an interior free surface in an elastic solid. In terms of this model, the force conjugate to speed of crack extension is the rate of dissipation of strain energy termed G. Experimental equipment for easuring the crack resist nce of a material as the crack extends from a starting notch or fatigue crack is described. The equipment furnishes values of crack extension as a function of stress in which the actual crack plus its associated inelastic deformations are analyzed as equivalent crack length. (Author)

Descriptors :   *FRACTURE (MECHANICS), *RECOILLESS GUNS, DEFORMATION, EQUATIONS, FATIGUE (MECHANICS), MATHEMATICAL ANALYSIS, STEEL

Distribution Statement : APPROVED FOR PUBLIC RELEASE