Abstract
To analyze the fatigue behavior of a simple composite-to-composite bonded joint, a combined experimental and analytical study of the cracked-lap-shear specimen subjected to constant-amplitude cyclic loading was undertaken. Two bonded systems were studied: T300/5208 graphite/epoxy adherends bonded with adhesives EC 3445 and with FM-300. For each bonded system, two specimen geometries were tested: (1) a strap adherend of 16 plies bonded to a lap adherend of 8 plies, and (2) a strap adherend of 8 plies bonded to a lap adherend of 16 plies. In all specimens tested, the fatigue failure was in the form of cyclic debonding with some 0°fiber pull-off from the strap adherend. The debond always grew in the region of adhesive that had the highest mode I (peel) loading and that region was close to the adhesive-strap interface. Furthermore, the measured cyclic debond growth rates correlated well with total strain energy release rates GT as well as with its components GI (peel) and GII (shear) for the mixed-mode loading in the present study.
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© 1984 Plenum Press, New York
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Mall, S., Johnson, W.S., Everett, R.A. (1984). Cyclic Debonding of Adhesively Bonded Composites. In: Mittal, K.L. (eds) Adhesive Joints. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-2749-3_38
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DOI: https://doi.org/10.1007/978-1-4613-2749-3_38
Publisher Name: Springer, Boston, MA
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