Design of joints and attachments in FRP ships' structures

Dodkins, A.R.; Shenoi, R.A.; Hawkins, G.L.

doi:10.1016/0951-8339(94)90031-0

Cited by 40 publications

(29 citation statements)

References 2 publications

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“…Linear finite-element analyses of composite sandwich T-joints were developed by Shenoi and Violette [40], Dodkins et al [42], and Phillips and Shenoi [44]. Non-linear analyses are provided in references [38], [39], [41], and [43] and may include damage in the form of delamination [42] or cracks [44].…”

Section: Damage Modellingmentioning

confidence: 99%

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Adhesively bonded joints in composite materials: An overview

Banea

Silva

2009

Proceedings of the Institution of Mechanical Engineers, Part L:

469

330

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A review of the investigations that have been made on adhesively bonded joints of fibre-reinforced plastic (FRP) composite structures (single skin and sandwich construction) is presented. The effects of surface preparation, joint configuration, adhesive properties, and environmental factors on the joint behaviour are described briefly for adhesively bonded FRP composite structures. The analytical and numerical methods of stress analysis required before failure prediction are discussed. The numerical approaches cover both linear and non-linear models. Several methods that have been used to predict failure in bonded joints are described. There is no general agreement about the method that should be used to predict failure since the failure strength and modes are different according to the various bonding methods and parameters, but progressive damage models are quite promising since important aspects of the joint behaviour can be modelled by using this approach. However, a lack of reliable failure criteria still exists, limiting in this way a more widespread application of adhesively bonded joints in principal load-bearing structural applications. An accurate strength prediction of the adhesively bonded joints is essential to decrease the amount of expensive testing at the design stage.

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Section: Damage Modellingmentioning

confidence: 99%

“…8). Various improved T-joints have been designed and investigated [37][38][39][40][41][42][43][44][45][46]; some with focus on improved strength and others on reduced weight. Also, T-joint connection can have foam fillets in the form of a pad or two triangular inserts combined with overlaminates [40].…”

Section: Effect Of Joint Configurationmentioning

confidence: 99%

Adhesively bonded joints in composite materials: An overview

Banea

Silva

2009

Proceedings of the Institution of Mechanical Engineers, Part L:

469

330

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“…A previous investigation [7] has shown that the service loads experienced by the tee joint can be simulated by clamping the flange close to the fillet on both sides of the web and applying a 'pull-off' load at 45 ~ Figure 4a illustrates the test set-up used to achieve this loading. The tee joints were clamped to a steel beam which was fixed in FORTRESS at an angle of 45 ~ The pull-off load was provided by a hydraulic ram that was positioned horizontally on FORTRESS.…”

Section: Tee Joint Loading Configurationmentioning

confidence: 99%

“…This has differentiated between single skin [5] and sandwich [6] configurations. Characterisation under static [7] and fatigue [8] load regimes has been done; this has involved experimentation coupled with numerical analysis. The thrust of the experimental work has been to obtain overall load-deflection features.…”

Section: Introductionmentioning

confidence: 99%

Thermoelastic stress analysis of a GRP tee joint

et al. 1997

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Abstract. A detailed study of the stresses that are developed in a glass reinforced plastic (GRP) tee joint under service loads is described. The joints are fabricated by laminating a boundary angle over a radiused fillet on either side of the 'tee'. Full-field stress characterisation data is provided by a thermoelastic analysis of the tee joint. Calibration procedures that allow the thermoelastic data to be compared with the results of a finite element analysis are detailed. The results of the thermoelastic analysis are compared with values obtained from the finite element analysis. The applicability of thermoelastic analysis as a validation tool for finite element models of composite materials is assessed.

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“…A robust and reliable hybrid structure relies upon the adequate connection between its composite and metallic components. Hence, a critical issue in the design of these structures is the joining of composite sections to metallic sub-structures [Dodkins et al (1994), Pei and Shenoi (1996), Clifford et al (2002), and Cao and Grenestedt (2003)]. In order to provide a safe design, it is imperative to understand the inherently non-linear behavior of hybrid joints, the interactions between their constituents, and the structural response in severe environments.…”

Section: Hybrid Structures For Marine Applicationsmentioning

confidence: 99%

Testing and Analysis of Hybrid Composite/Metal Connections and Hull Section for the MACH Project

Kabche¹,

Caccese²,

Berube³

2006

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This report summarizes the development, testing and analysis of hybrid composite/metal connections and hybrid structural systems under the Modular Advanced Composite Hullform (MACH) project. The MACH project, funded by the Office of Naval Research, is part of a joint effort between the University of Maine, Navatek of Honolulu, HI, and Applied Thermal Sciences (ATS) of Sanford, Maine, and is performed in conjunction with the Naval Surface Warfare Center at Carderock, MD (NSWCCD). The primary motivation for the work summarized herein is to provide alternatives to conventional hull construction techniques and conventional hull forms by using modular hybrid construction methods. Included is a description of tests performed on sub-scale hybrid bolted connections, where the objective was to develop watertight connections for removable panels. An experimental study was conducted to quantify the performance of numerous hybrid joints with various geometries, loaded in flexure. The test results showed that for resisting bending loads, joints with doubler plates can be made stronger and rotationally stiffer than standard bolted joints, while also mitigating opening of the joint, thereby improving the ability to seal the connection for watertight integrity.The results of this study were used to select a connection geometry, which was incorporated into the hydrostatic testing of a full-scale four-panel assembly. Testing of the assembly is described in this report and shows that a linear response of the system was observed up to its design pressure load of 82.74 kPa. Damage initiated as stiffener delamination at 1.4 times the design load. After failure of several stiffeners, the hybrid assembly withstood up to 3 times its design load without leakage. Hence, the response of the hybrid joint employed was deemed successful.Numerical analysis of the connections and assembly are also presented. Simplified shell finite element models were developed at both local and global levels. These models were for estimation of the joint stiffness and good correlation with the test results was observed. Strength of the system was predicted using detailed plane strain contact models to capture the three-dimensional effects of the connection. ii ACKNOWLEDGMENTSThe authors gratefully acknowledge funding for this project through the Office of Naval

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Design of joints and attachments in FRP ships' structures

Cited by 40 publications

References 2 publications

Adhesively bonded joints in composite materials: An overview

Adhesively bonded joints in composite materials: An overview

Thermoelastic stress analysis of a GRP tee joint

Testing and Analysis of Hybrid Composite/Metal Connections and Hull Section for the MACH Project

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