Accession Number : AD0263054

Title :   LOADING AND UNLOADING SOLUTIONS FOR AN ELASTIC/PLASTIC ANNULAR PLATE IN THE STATE OF PLANE STRESS UNDER COMBINED PRESSURE AND COUPLE

Corporate Author : CALIFORNIA UNIV BERKELEY INST OF ENGINEERING RESEARCH

Personal Author(s) : NORDGREN,R.P. ; NAGHDI,R.M.

Report Date : APR 1961

Pagination or Media Count : 1

Abstract : A detailed analysis is presented of the axisymmetric deformation of elastic/plastic circular annular plates in the state of plane stress under combined pressure and couple (due to circumferential shear) at the inner boundary. With the use of Tresca's loading function and itsASSOCIATED FLOW RULES, THE RESULTS OBTAINED INCLUDE COMPLETE ELASTIC/PERFECTLY PLASTIC SOLUTIONS DURING BOTH LOADING AND UNLOADING, AND COMPLETE WORKHARDENING SOLUTIONS DURING LOADING WITH ISOTROPIC AND WITH KINEMATIC HARDENING. The major portion of the paper deals with the unloading problem which requires two new solutions (in addition to the usual elastic unloading solution) in order to cover the full range of load programs including those with one load parameter increasing and the other decreasing. Several novel features of this combined load problem are discussed and illustrated through numerical ex mples. (Author)

Descriptors :   *DISKS, *MECHANICS, CREEP, DEFORMATION, ELASTIC PROPERTIES, HARDENING, LOAD DISTRIBUTION, MATHEMATICAL ANALYSIS, METAL PLATES, MOMENTS, PLASTIC PROPERTIES, PRESSURE, SHEAR STRESSES, STRESSES, THEORY

Distribution Statement : APPROVED FOR PUBLIC RELEASE