CUED Publications database

Quasi-static three-point bending of carbon fiber sandwich beams with square honeycomb cores

Russell, BP and Liu, T and Fleck, NA and Deshpande, VS (2011) Quasi-static three-point bending of carbon fiber sandwich beams with square honeycomb cores. Journal of Applied Mechanics, Transactions ASME, 78. ISSN 0021-8936

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Abstract

Sandwich beams comprising identical face sheets and a square honeycomb core were manufactured from carbon fiber composite sheets. Analytical expressions were derived for four competing collapse mechanisms of simply supported and clamped sandwich beams in three-point bending: core shear, face microbuckling, face wrinkling, and indentation. Selected geometries of sandwich beams were tested to illustrate these collapse modes, with good agreement between analytic predictions and measurements of the failure load. Finite element (FE) simulations of the three-point bending responses of these beams were also conducted by constructing a FE model by laying up unidirectional plies in appropriate orientations. The initiation and growth of damage in the laminates were included in the FE calculations. With this embellishment, the FE model was able to predict the measured load versus displacement response and the failure sequence in each of the composite beams. © 2011 American Society of Mechanical Engineers.

Item Type: Article
Uncontrolled Keywords: composite damage mechanics honeycomb core sandwich beam
Subjects: UNSPECIFIED
Divisions: Div C > Materials Engineering
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 11:40
Last Modified: 26 Nov 2014 19:05
DOI: 10.1115/1.4003221