Bearing strength of carbon fibre/epoxy laminates: effects of bolt-hole clearance

Kelly, Gordon; Hallström, Stefan

doi:10.1016/j.compositesb.2003.11.001

Cited by 137 publications

(91 citation statements)

References 21 publications

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“…Generally, thicker coupon is efficient to transfer more load through plate thickness to give higher peak load. Bearing stress increased with plate thickness, consistent with the findings by Gordon Kelly et al [13]. In application of bolt load, introduction of pre-tension load in bolt able to produce compression in out-of-plane between joining plates.…”

Section: Load-displacement Profilesupporting

confidence: 80%

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Bearing Stress at Failure of Double-Lap Hybrid Joints in Woven Fabric Kenaf Fiber Composite Plates under Quasi-static Loading

Lee

Ahmad

2017

MATEC Web Conf.

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Abstract. The present paper is focused on the bearing stress at failure of double-lap woven fabric kenaf fiber reinforced polymer (KFRP) hybrid bonded-bolted joints in experimental frameworks. The effects of different normalized plate width (plate width/hole diameter, W/d), lay-up types and bolt loads were incorporated in current study as specified in testing series. Generally, hybrid joint coupons separated within adhesive layer prior to net-tension failure or bearing/net-tension failure. The bearing stress at failure increased as W/d ratio increment, critical W/d is given as four and three in clamped and finger tight condition respectively. Lay-up types present insignificant effect to bearing stress at failure due to low volume fiber fraction in kenaf fiber composites. Combination of thicker and clamped conditions plate demonstrated greater bearing stress than equivalent finger-tight (FT) conditions due to higher load transferred from friction, as expected.

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Section: Load-displacement Profilesupporting

confidence: 80%

“…It is clearly observed that all testing coupons were failed in net-tension mode. Consistent trend with single-lap non-crimp CFRP hybrid joint was reported by Kelly et al [13], critical W/d (transition from net-tension to bearing failure) is given as three.…”

Section: Load-displacement Profilesupporting

confidence: 70%

Bearing Stress at Failure of Double-Lap Hybrid Joints in Woven Fabric Kenaf Fiber Composite Plates under Quasi-static Loading

Lee

Ahmad

2017

MATEC Web Conf.

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“…The damage mechanism remains constant after the maximum force level has been achieved. In the literature, this fracture behaviour is referred to as bearing [4], [5], [6], [7]. A force drop, which indicates a failure of the specimen, was not detected in the shear load test.…”

Section: Resultsmentioning

confidence: 99%

Mechanical Testing of Flow Drill Screw Joints Between Fibre-Reinforced Plastics and Metals

Szlosarek¹,

Karall²,

Enzinger³

et al. 2013

Materials Testing

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The paper describes a novel testing method for mechanical joints between fibre-reinforced plastics and metals. As an example, the paper discusses a connection between a continuous carbon-fibre-reinforced plastic and aluminium via a flow drill screw. The failure load of the joints under different loading angles was tested with the help of a modified KS-II testing facility. A detailed analysis of the damage and failure behaviour of the connection was performed by means of optical recordings and micrographs. The results indicate that the tested material combination has nearly the same failure load at different loading angles with various failure mechanisms. The experimental results can be used to devise new failure criteria for these connections and to detect limit values for the design process.

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“…In the model, it is assumed that the laminate thickness, hole diameter and bolt-hole clearance have a negligible effect on the bearing strength of the joint. Kelly and Hallström [31] found that laminate thickness did not have a significant effect on the bearing strength of torqued (5 Nm) laminates, but a slight degree of variation existed when varying clearance cases were examined. McCarthy et al [1] found that the presence of bolt-hole clearance only marginally affects the bearing strength of the joint and so, the assumptions made herein seemed reasonable.…”

Section: Capabilities Of the Modelmentioning

confidence: 99%

A highly efficient user-defined finite element for load distribution analysis of large-scale bolted composite structures

Gray¹,

McCarthy²

2011

Composites Science and Technology

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This paper presents the development of a highly efficient user-defined finite element for modelling the bolt-load distribution in large-scale composite structures. The method is a combined analytical/numerical approach and is capable of representing the full non-linear load-displacement behaviour of bolted composite joints both up to, and including, joint failure. In the elastic range, the method is generic and is a numerical extension of a closedform method capable of modelling the load distribution in single-column joints. A semiempirical approach is used to model failure initiation and energy absorption in the joint and this has been successfully applied in models of single-bolt, single-lap joints. In terms of large-scale applications, the method is validated against an experimental study of complex load distributions in multi-row, multi-column joints. The method is robust, accurate and highly efficient, thus demonstrating its potential as a time/cost saving design tool for the aerospace industry and indeed other industries utilising bolted composite structures.

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Bearing strength of carbon fibre/epoxy laminates: effects of bolt-hole clearance

Cited by 137 publications

References 21 publications

Bearing Stress at Failure of Double-Lap Hybrid Joints in Woven Fabric Kenaf Fiber Composite Plates under Quasi-static Loading

Bearing Stress at Failure of Double-Lap Hybrid Joints in Woven Fabric Kenaf Fiber Composite Plates under Quasi-static Loading

Mechanical Testing of Flow Drill Screw Joints Between Fibre-Reinforced Plastics and Metals

A highly efficient user-defined finite element for load distribution analysis of large-scale bolted composite structures

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