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Continuum modeling of three-dimensional truss-like space structuresA mathematical and computational analysis capability has been developed for calculating the effective mechanical properties of three-dimensional periodic truss-like structures. Two models are studied in detail. The first, called the octetruss model, is a three-dimensional extension of a two-dimensional model, and the second is a cubic model. Symmetry considerations are employed as a first step to show that the specific octetruss model has four independent constants and that the cubic model has two. The actual values of these constants are determined by averaging the contributions of each rod element to the overall structure stiffness. The individual rod member contribution to the overall stiffness is obtained by a three-dimensional coordinate transformation. The analysis shows that the effective three-dimensional elastic properties of both models are relatively close to each other.
Document ID
19780060992
Document Type
Reprint (Version printed in journal)
Authors
Nayfeh, A. H. (Cincinnati, University Cincinnati, Ohio, United States)
Hefzy, M. S. (Cincinnati Univ. OH, United States)
Date Acquired
August 9, 2013
Publication Date
August 1, 1978
Publication Information
Publication: AIAA Journal
Volume: 16
Subject Category
STRUCTURAL MECHANICS
Funding Number(s)
CONTRACT_GRANT: NSG-1185
Distribution Limits
Public
Copyright
Other