Date of Award
Fall 1987
Document Type
Thesis
Department
Mechanical & Aerospace Engineering
Program/Concentration
Engineering Mechanics
Committee Director
Jean W. Hou
Committee Member
Stephen G. Cupschalk
Committee Member
Tom Houlihan
Call Number for Print
Special Collections; LD4331.E57W57
Abstract
The Pyramidal Truss Core Panel has been developed to save weight in applications normally devoted to solid plates. Present design formulas use classical beam theory with engineering assumptions made for moment of inertia and shear modulus determinations. Analysis with the SUPERSAP finite element code indicates that the present theory provides good prediction for the plate stresses but may be inadequate for the core stress and deflection determination. Two optimization routines are presented. The first procedure uses a batch file to execute separate programs with SUPERSAP used as the analysis code. The second combines a FORTRAN program used for analysis with the optimization code into a single program. Both procedures are shown to work but with difficulties arising due to non-linearities in the constraint equations and unusually high stress calculations in the core by the analysis codes. Optimization using the batch file may be impractical due to large computer costs associated with the finite element analysis needed for gradient evaluations.
Rights
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DOI
10.25777/skhh-8b82
Recommended Citation
Wiseman, Mark A..
"Analysis and Optimal Design of Pyramidal Truss Core Panels"
(1987). Thesis, Old Dominion University, DOI: 10.25777/skhh-8b82
https://digitalcommons.odu.edu/mae_etds/759