Basis Of A Well Conditioned Force Program For Equilibrium Models Via The Southwell Slab Analogies

Item

Title
Basis Of A Well Conditioned Force Program For Equilibrium Models Via The Southwell Slab Analogies
Date
1967
Index Abstract
Coming Soon
Photo Quality
Not Needed
Report Number
AFFDL TR 67-10
Creator
de Veubeke, Baudouin M. Fraeijs
Corporate Author
Liege Univ (Belgium) Laboratoire D'aeronautique
Laboratory
Air Force Flight Dynamics Laboratory
Extent
28
Identifier
AD0652239
Access Rights
Distribution of this report is unlimited
Distribution Classification
1
Contract
AF 61(052)-892
DoD Project
1467
DoD Task
146705
DTIC Record Exists
No
Distribution Change Authority Correspondence
None
Abstract
Equilibrium models of finite elements have by definition the property of satisfying detailed equilibrium within the structure. Their usefullness lies in their ability to predict upper bounds to influence coefficients. The larger number of nodal displacements but the smaller number of selfstressing states, by comparison with displacement models, suggests the development of a force type program in preference to a stiffness program. The report shows how the Southwell slab analogies between displacement fields in conforming displacement models and stress functions in equilibrium models provide an efficient method for selecting force redundancies and particular equilibrium solutions. The method automatically reduces to a minimum the coupling between the unknowns.
Report Availability
Full text available
Date Issued
1967-03
Provenance
Lockheed Martin Missiles & Fire Control
Type
report
Format
1 online resource
Media
AFFDLTR67-010.pdf