
Accession Number : AD0482793
Title : STIFFNESS ANALYSIS OF ELASTOPLASTIC PLATES.
Descriptive Note : Rept. for Oct 64May 65,
Corporate Author : CALIFORNIA INST OF TECH PASADENA GRADUATE AERONAUTICAL LABS
Personal Author(s) : Swedlow, J. L. ; Yang, W. H.
Report Date : JAN 1966
Pagination or Media Count : 45
Abstract : The PrandtlReuss flow rule is used as a basic for deriving the constitutive equations for elastoplastic media with workhardening. The equations are specialized to the cases of torsion of prismatic bars, plane stress, and plane strain. In the case of plane stress, the direct stiffness method may be extended to provide solutions, and the requisite procedure is outlined. As an example of the type of problem that may be treated, a rectangular plate is considered with an internal crack, showing the distribution of elements and a typical stressstrain curve. A sample of the numerical results is given. The effect of large strains is also discussed.
Descriptors : *ELASTIC PROPERTIES), (*STRESSES, (*STRAIN(MECHANICS), MATHEMATICAL ANALYSIS), PRISMATIC BODIES, SHEETS, PLASTIC PROPERTIES, FORCE(MECHANICS), TORSION, LOADS(FORCES), CONTINUUM MECHANICS, NONLINEAR SYSTEMS, SET THEORY, MATRICES(MATHEMATICS), VECTOR ANALYSIS, MATHEMATICAL MODELS, PROBLEM SOLVING, BOUNDARY VALUE PROBLEMS, COMPUTERS, EQUATIONS.
Subject Categories : Mechanics
Distribution Statement : APPROVED FOR PUBLIC RELEASE