GLASS II: global--local finite element analysis of structural systems. [For IBM computers, in FORTRAN

Abstract

A computer program with acronym GLASS-II is described. This code is based on the concept of global--local finite elements, wherein both contemporary finite element and classical Rayleigh--Ritz approximations are simultaneously employed. The library of elements in GLASS-II include the axisymmetric element, planar element, three-dimensional solid element, plate bending element, and shell element. Moreover, for the axisymmetric and planar elements, general loading conditions can be treated by their expansion in terms of Fourier series. Derivation of the element matrices and consistent load vectors are described in detail. A brief description of the GLASS-II computer code is given, which at the present time is checked out for static analysis problems. A version with dynamic analysis capabilties is forthcoming. Instructions concerned with the programming of the global functions (a term used to denote the Rayleigh--Ritz approximations) are provided. These functions depend on the problem to be analyzed and must be provided by the user/analyst. The user's manual is contained in Appendix I and the computer listing of the GLASS-II code appears as Appendix I and the computer listing of the GLASS-II code appears as Appendix II. This code has been applied to the calculation of stress intensity factors and to problems involving amore » half-space. These applications evince the modeling versatility and computational effectiveness inherent in global--local finite element analysis. 10 figures.« less