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Finite element analysis of catastrophic failure of dynamically-loaded countersunk composite fuselage joints

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posted on 2023-01-11, 14:13 authored by Brian Egan, Michael McCarthyMichael McCarthy, Ronan Frizzell, Conor Mc CarthyConor Mc Carthy
Accurate models of dynamic structural failure are important for crashworthiness studies. To date, catastrophic failure of dynamically-loaded composite bolted joints has been studied using global or stacked shell element models. In this paper, high-fidelity (three-dimensional solid) explicit FE models are used to simulate catastrophic failure of countersunk composite fuselage joints. While current state-of-the-art 3D modelling approaches focus almost exclusively on the prediction of composite damage, this study also investigates the treatment of fastener damage. Fastener fracture is a common catastrophic joint failure mode, particularly in joints designed to initially fail in bearing. A Johnson-Cook material model and cohesive elements were used to predict plasticity, damage and fracture of the titanium (Ti-6Al-4V) fastener. Although a model calibration was required, due to the complex interaction of model parameters, numerical results demonstrate key trends of experiments and provide a starting point for the development of more predictive approaches for simulating fastener failure


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Composite Structures; 133, pp. 1198-1208





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This is the author’s version of a work that was accepted for publication in Composite Sturctures. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Composite Structures, 2015, 133, pp. 1198-1208 133, ,



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