Damage tolerance of CFRP airframe bolted joints in bearing, following bolt pull-through failure

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dc.contributor.authorGiannopoulos, Ioannis K.
dc.contributor.authorGrafton, Kaelan
dc.contributor.authorGuo, Shijun
dc.contributor.authorSmith, Howard
dc.date.accessioned2020-02-24T17:02:48Z
dc.date.available2020-02-24T17:02:48Z
dc.date.issued2020-01-15
dc.description.abstractThe experimental study presented herein, investigated the residual strength of bolted joints on Carbon Fiber Reinforced Polymer (CFRP) airframe structures within the context of structural damage tolerance and airworthiness regulations. The damage scenario assumed, subjected a series of bolted joint CFRP laminate specimens to quasi-static bearing loading, following bolt pull-through failure events of different magnitude. Representative CFRP laminate specimens manufactured from AS7/8552 carbon fiber/epoxy matrix system were artificially damaged under bolt pull-through loading, following the herein proposed modifications to the current pull-through ASTM testing procedure. The specimens were subsequently tested in static bearing loading for examining the specimen residual bearing strength. The residual joint bearing strength was related to the displacement travelled passed the initial failure stage in pull-through mode and was measured up to a maximum of a 13% decrease for the tested samples and the maximum damage imposed. The study explored the safe utilization of bolted joints at higher operating loading levels, within the context of the current airworthiness regulations. The inherent damage arrest features of the joints were highlighted. The study concluded with comments and suggestions on the expansion of the current utilization spectrum of damaged bolted joints from pull-through loading in airframe design, bound by the current airworthiness certification requirements.en_UK
dc.identifier.citationGiannopoulos IK, Grafton K, Guo S, Smith H. (2020) Damage tolerance of CFRP airframe bolted joints in bearing, following bolt pull-through failure. Composites Part B: Engineering, Volume 185, March 2020, Article number 107766en_UK
dc.identifier.issn1359-8368
dc.identifier.urihttps://doi.org/10.1016/j.compositesb.2020.107766
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/15178
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectStructural jointsen_UK
dc.subjectMechanical testingen_UK
dc.subjectMechanical testingen_UK
dc.titleDamage tolerance of CFRP airframe bolted joints in bearing, following bolt pull-through failureen_UK
dc.typeArticleen_UK

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