Accession Number : AD0726548

Title :   Normal Impact of an Infinite Elastic-Plastic Beam by a Semi-Infinite Elastic Rod.

Descriptive Note : Technical rept. Feb 70-Mar 71,

Corporate Author : BROWN UNIV PROVIDENCE R I DIV OF ENGINEERING

Personal Author(s) : Ranganath,S. ; Clifton,R. J.

Report Date : MAY 1971

Pagination or Media Count : 70

Abstract : Solutions are obtained for the problem of normal impact of an infinite elastic-plastic beam by a semi-infinite elastic rod. The effects of rotatory inertia and shear deformations are included in the equations governing the motion of the beam. A strain rate independent model based on concepts similar to those employed in quasi-static plasticity is used to describe material behavior. The interaction between moment and shear force is included. A strain hardening criterion is used based on the quasi-static moment-curvature relation for pure bending. Strain-time profiles computed using this theory agree reasonably well with those obtained in experiments on aluminum beams. The computed solutions are also compared with predictions based on a rigid perfectly plastic beam theory. (Author)

Descriptors :   (*BEAMS(STRUCTURAL), IMPACT SHOCK), (*RODS, IMPACT SHOCK), SHOCK(MECHANICS), MECHANICAL WAVES, LOADS(FORCES), STRAIN HARDENING, BENDING, ELASTIC PROPERTIES, DEFORMATION, EQUATIONS OF MOTION, PLASTIC PROPERTIES, ALUMINUM ALLOYS

Subject Categories : Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE