Elastic Constants for Superplastically Formed/Diffusion-Bonded Corrugated Sandwich Core

Ko, William L. (1980) Elastic Constants for Superplastically Formed/Diffusion-Bonded Corrugated Sandwich Core. Technical Report NASA TP-1562, Research Engineering, NASA Dryden Flight Research Center.

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Abstract

This paper presents formulae and associated graphs for evaluating the effective elastic constants for a superplastically formed/diffusion-bonded (SPF/DB) corrugated sandwich core. The results were used in the comparison of structural stiffnesses of the above sandwich core and a honeycomb core under conditions of equal sandwich core density. It was found that the stiffness in the thickness direction of the optimum SPF/DB corrugated core (that is, triangular truss core) was lower than that of the honeycomb core, and that the former had higher transverse shear stiffness than the latter.

EPrint Type:	NASA Technical Publication
Keywords:	Stiffness, Structural properties
Subjects:	Aircraft/Project: Nonaircraft-specific (31 - 39) Engineering: (39) Structural Mechanics
ID Code:	644
Deposited On:	09 Febuary 2006
Additional Information:	82 pages. This report is an expanded version of "Elastic Constants for Superplastically Formed/Diffusion-Bonded Sandwich Structures" by the same author (AIAA Paper No. 79-0756).