Accession Number : AD0699835

Title :   A PRACTICAL MODEL OF THREE-DIMENSIONAL VISCOELASTOPLASTICITY,

Corporate Author : KAMAN NUCLEAR COLORADO SPRINGS COLO

Personal Author(s) : Fromme,Joseph A.

Report Date : 12 NOV 1969

Pagination or Media Count : 39

Abstract : A practical three-dimensional viscoelastoplastic constitutive law is developed. It is applicable to interior points as well as to boundary points where certain of the stress components may be prescribed by boundary conditions. The calculational procedure is suitable for direct inclusion into finite difference codes and has been incorporated into the GENERAL code. Numerical results are presented. For missile structural lethality and vulnerability problems, material damping tends to result in three-dimensional response decaying to two dimensional shell-like response after only a few skin thickness transits. (Author)

Descriptors :   (*GUIDED MISSILES, NUCLEAR EXPLOSIONS), (*AIRFRAMES, VULNERABILITY), (*SHELLS(STRUCTURAL FORMS), MECHANICAL PROPERTIES), VISCOELASTICITY, PLASTIC PROPERTIES, MATHEMATICAL MODELS, STRESSES, DAMPING, BOUNDARY VALUE PROBLEMS, COMPUTER PROGRAMMING, NUMERICAL ANALYSIS, EXPLOSION EFFECTS, ALUMINUM ALLOYS, CYLINDRICAL BODIES, MECHANICAL WAVES, YIELD POINT, THICKNESS

Subject Categories : Structural Engineering and Building Technology
      Guided Missiles
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE