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Effects of transient dynamic loading on the energy absorption capability of composite bolted joints undergoing extended bearing failure

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journal contribution
posted on 2020-06-10, 14:12 authored by Thomas Feser, Jazib Hassan, Matthias Waimer, Ronan M. O'Higgins, Conor T. McCarthy, Nathalie Toso, Heinz Voggenreiter, Michael A. McCarthy
Carbon fibre reinforced polymer (CFRP) materials are widely used in transport aircraft. Crashworthiness requirements demand sufficient energy absorption capacity, especially in the fuselage structure. In a recently-proposed approach, specifically-designed “tension absorber” joints utilize tension loads for energy absorption via progressive bearing failure. For further development of the concept, experimental tests are performed on pin- joints in quasi-isotropic CFRP material, under transient dynamic loading at 3 m/s. Investigated parameters are laminate thickness, stacking sequence and pin diameter, and the results are evaluated using the performance parameters ultimate bearing strength, mean crush stress and mass-specific energy absorption. A strong relation between the ratio of pin diameter to laminate thickness, D/t, and the performance parameters is found. Compared to previous results for quasi-static loading, the ultimate bearing strength is increased whereas the mean crush stress and mass-specific energy absorption are reduced. Digital image correlation and computed tomography analysis reveals the mechanisms behind the observed trends. The results provide a basis for further optimization of energy-absorbing joints and validation of finite element models.

Funding

Study on Aerodynamic Characteristics Control of Slender Body Using Active Flow Control Technique

Japan Society for the Promotion of Science

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History

Publication

Composite Structures;247, 112476

Publisher

Elsevier

Note

peer-reviewed The full text of this article will not be available in ULIR until the embargo expires on the 21/05/2022

Other Funding information

ERC

Rights

This is the author’s version of a work that was accepted for publication in Composite Structures. 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 Composites Structures, 2020, 247, 112476,Effects of transient dynamic loading on the energy absorption capability of composite bolted joints undergoing extended bearing failure, https://doi.org/10.1016/j.compstruct.2020.112476

Language

English

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