Elastic-Plastic Analysis by the Hybrid-Stress Model and the Initial-Stress Approach.

Abstract

SITE MATERIALS, Structures, Fibers, Mathematical models, Stresses, Stress strain relations, Static loadsFinite element analysisA finite-element elastic-plastic incremental procedure for the static analysis of structures whose initially-isotropic material behavior may be elastic, perfectly-plastic or strain hardening has been developed and implemented in a breadboard computer program. The formulation is based on the assumed-stress hybrid model and the initial stress included by modifying the conventional hybrid functional, resulting in a consistently derived equivalent load vector due to the initial stress. Also included in the formulation is an equivalent load term corresponding to the possible compatibility mismatch at each incremental step. The formulation and the corresponding solution procedure are evaluated using a particular plane-stress example, and convergence of the solution is shown. (Author)

Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1973
Accession Number
AD0772933

Entities

People

  • Robert L. Spilker

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Computer Programs
  • Computers
  • Convergence
  • Hardening
  • Materials
  • Mathematical Models
  • Models
  • Strain Hardening
  • Stress Strain Relations
  • Stresses

Fields of Study

  • Engineering

Readers

  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Mechanical Engineering/Mechanics of Materials.
  • Structural Dynamics.