Influence of root rotation on delamination fracture toughness of composites

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Abstract

Large deviations have been observed while analysing composite double cantilever beam (DCB) specimens assuming each cracked half as a simple cantilever beam. This paper examines the effect of rotational spring stiffness (K) on the critical fracture energy (G I C) considering nonzero slope at the crack-tip of the DCB specimen by modelling each cracked half as the spring-hinged cantilever beam. The critical load estimates of DCB specimens from G I C are found to be in good agreement with in-house and existing test results of different composite material systems.

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Alfred Franklin, V., Christopher, T., & Nageswara Rao, B. (2014). Influence of root rotation on delamination fracture toughness of composites. International Journal of Aerospace Engineering, 2014. https://doi.org/10.1155/2014/829698

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