Accession Number : AD0890200

Title :   PETROS 3: A Finite-Difference Method and Program for the Calculation of Large Elastic-Plastic Dynamically-Induced Deformations of Multilayer Variable-Thickness Shells.

Descriptive Note : Contract rept.,

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE AEROELASTIC AND STRUCTURES RESEARCH LAB

Personal Author(s) : Atluri, Satyanadham ; Witmer, Emmett A. ; Leech, John W. ; Morino, Luigi

Report Date : NOV 1971

Pagination or Media Count : 375

Abstract : The governing equations for the arbitrarily large-deformation elastic-plastic transient responses of variable-thickness, hard-bonded, multilayer, multimaterial, thin, Kirchhoff shells of any initial shape are formulated and solved by the finite difference technique. The material is assumed to be initially isotropic and to exhibit elastic, strain-hardening, strain-rate-sensitive, and temperature dependent behavior. the structure may be subjected to a variety of initial velocity distributions, transient mechanical loads, and/or transient thermal loads. These capabilities and features are contained in a computer program PETROS 3 which has been applied to a variety of example problems. Included herein is a FORTRAN IV listing and a description of PETROS 3 together with the data input and solution output for several example problems. (Author)

Descriptors :   (*SHELLS(STRUCTURAL FORMS), DEFORMATION), (*MECHANICAL PROPERTIES, COMPUTER PROGRAMS), ELASTIC PROPERTIES, PLASTIC PROPERTIES, LOADS(FORCES), STRESSES, STRAIN(MECHANICS), STRAIN HARDENING, EQUATIONS OF MOTION, BOUNDARY VALUE PROBLEMS, TENSOR ANALYSIS, NUMERICAL ANALYSIS, NUMERICAL INTEGRATION.

Subject Categories : Computer Programming and Software
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE