Implementation of a Trapezoidal Ring Element in NASTRAN for Elastic-Plastic Analysis

Abstract

The explicit expressions for an elastic-plastic trapezoidal ring element are presented and implemented in NASTRAN computer program. The material is assumed to obey the von Mises' yield criterion, isotropic hardening rule, and the Prandtl-Reuss flow relations. For the purpose of demonstration, two elastic- plastic problems are solved and compared with previous results. The first is a plane strain tube under uniform internal pressure and the second a finite-length tube loaded over part of its inner surface. A very good agreement has been found in both test problems.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1979
Accession Number
ADA083870

Entities

People

  • P. O’hara
  • Pengyu Chen

Organizations

  • United States Army Armament Research, Development and Engineering Center

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Classification
  • Computational Fluid Dynamics
  • Computer Programs
  • Computers
  • Demonstrations
  • Finite Element Analysis
  • Hardening
  • Internal Pressure
  • Materials
  • Mechanics
  • Military Research
  • Numerical Analysis
  • Plastic Flow
  • Procedures (Computers)
  • Security
  • Stiffness
  • Two Dimensional

Readers

  • Structural Dynamics.