Buckling and postbuckling of a delaminated composite beam in bending

M. Kinawy; R. Butler; G. W. Hunt

doi:10.2514/1.J050784

Buckling and postbuckling of a delaminated composite beam in bending

M. Kinawy, R. Butler, G. W. Hunt

Department of Mechanical Engineering

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10 Citations (SciVal)

Abstract

A study was conducted to model the thin delaminated layer using the Elastica theory and investigate the postbuckling behavior for a delaminated beam under compression. Static tests were performed to understand the buckling and propagation behavior of 16-ply, laminated beams with a through-width delamination created by a polytetrafluoroethylene (PTFE) layer of 0.02 mm thickness and 40 mm length placed at the mid length of the beam between the second and third ply. A unidirectional plate made of M21-T800 carbon material was laid up and cured using an autoclave. An INSTRON-1332 servo-hydraulic machine with 10 kN load cell was used for loading application. The strain gauges and loading channel from the servo-hydraulic machine were connected to a SPIDER-8 data acquisition system which was attached to a PC. The specimens were also loaded through a four point bending fixture under displacement control.

Original language	English
Pages (from-to)	670-672
Number of pages	3
Journal	AIAA Journal
Volume	49
Issue number	3
DOIs	https://doi.org/10.2514/1.J050784
Publication status	Published - Mar 2011

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abstract = "A study was conducted to model the thin delaminated layer using the Elastica theory and investigate the postbuckling behavior for a delaminated beam under compression. Static tests were performed to understand the buckling and propagation behavior of 16-ply, laminated beams with a through-width delamination created by a polytetrafluoroethylene (PTFE) layer of 0.02 mm thickness and 40 mm length placed at the mid length of the beam between the second and third ply. A unidirectional plate made of M21-T800 carbon material was laid up and cured using an autoclave. An INSTRON-1332 servo-hydraulic machine with 10 kN load cell was used for loading application. The strain gauges and loading channel from the servo-hydraulic machine were connected to a SPIDER-8 data acquisition system which was attached to a PC. The specimens were also loaded through a four point bending fixture under displacement control.",

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Buckling and postbuckling of a delaminated composite beam in bending

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