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Criteria for representing circular arc and sine wave spar webs by non-curved elementsThe basic problem of how to simply represent a curved web of a spar in a finite element structural model was addressed. The ratio of flat web to curved web axial deformations and longitudinal rotations were calculated using NASTRAN models. Multiplying factors were developed from these calculations for various web thicknesses. These multiplying factors can be applied directly to the area and moment of inertia inputs of the finite element model. This allows the thermal stress relieving configurations of sine wave and circular arc webs to be simply accounted for in finite element structural models.
Document ID
19790025328
Acquisition Source
Legacy CDMS
Document Type
Technical Memorandum (TM)
Authors
Jenkins, J. M. (NASA Hugh L. Dryden Flight Research Center Edwards, CA, United States)
Date Acquired
September 3, 2013
Publication Date
October 1, 1979
Subject Category
Structural Mechanics
Report/Patent Number
H-1106
NASA-TM-72869
Accession Number
79N33499
Funding Number(s)
PROJECT: RTOP 505-02-54
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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