Fiber Reinforced Composite Structure with Bolted Joint – A Review

Jadee, Khudhayer J.; Othman, Abdul Aziz

doi:10.4028/www.scientific.net/kem.471-472.939

Cited by 15 publications

(8 citation statements)

References 45 publications

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“…The final product has an average density of 1100 kg/m 3 [ 18 ]. Due to its unidirectional nature, when PSB is loaded along the axis of its fibres, all fibres are recruited in the loading process, resulting in a higher tensile capacity compared to multidirectional composites [ 20 , 21 , 22 ]. However, when PSB is loaded in tension perpendicular to the fibres’ orientation, it demonstrates significantly less capacity than a multidirectional composite since the fibres are not directly recruited to carry the load.…”

Section: Introductionmentioning

confidence: 99%

“…A common practice to mechanically connect composite materials is bolted connections. Although they are the most efficient method of mechanical joining [ 23 ], bolted connections introduce significant stress concentrations surrounding the bolt holes in composite materials [ 20 , 23 , 24 , 25 , 26 , 27 , 28 , 29 ]. The way these stress concentrations are redistributed depends on whether the material is ‘notch sensitive’ or ‘insensitive’ [ 30 ].…”

Section: Introductionmentioning

confidence: 99%

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Connection Confinement of Bolted Fibre-Reinforced Polymer Bamboo Composite

et al. 2022

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Parallel strand bamboo is a composite material that demonstrates high strength and low variability compared to other timber materials. However, its use in bolted connections is limited by a tendency to fail in shear-out mode. One promising technique to prevent failure is the method of confinement, whereby the composite connection is confined laterally, inducing a compressive force perpendicular to the composite fibres, which increases the shear strength in the loading process. This paper investigates the confinement method and its effect on parallel strand bamboo connections’ strength and failure mechanisms through experimental tests and ANSYS simulation methods. It was discovered that bolted connection confinement reduces the propensity of shear-out failure by counteracting shear stresses. A comparison of graphical results revealed that confinement increased the ultimate tensile capacity of parallel strand bamboo bolted connections by up to 26%. Confinement also improved the consistency of the connection’s mechanical properties throughout the loading process. These findings assist in refining and optimising practical applications of parallel strand bamboo connections by using the method of connection confinement.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Connection Confinement of Bolted Fibre-Reinforced Polymer Bamboo Composite

et al. 2022

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“…The pursuit of aviation transport constructors, especially of aircraft, to lower the weight has led to the replacement of a very large number of designed metal components with composite elements. Composite structures are joined in three different ways—by using mechanical joints [ 1 , 2 ], by means of an adhesive [ 3 ], or by a combination of these two methods [ 4 , 5 ].…”

Section: Introductionmentioning

confidence: 99%

Influence of the Arrangement of Mechanical Fasteners on the Static Strength and Fatigue Life of Hybrid Joints

et al. 2020

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This paper presents the results of experimental research and numerical calculations regarding the static strength and fatigue life of hybrid joints. In the experiments, specimens built as single-lap adhesive–mechanical joints (hybrid joints) were tested. In a two-stage process of the failure of the hybrid joints, the adhesive joint was damaged first. Therefore, it was assumed that the assembly of fasteners closer to the edge of the overlap (beyond the ranges recommended for mechanical joints) limits the negative impact of the peeling phenomenon on the strength and performance properties of hybrid joints. The specimens used in the experiments were prepared from composite elements (i.e., carbon fiber-reinforced polymer (CFRP)), as well as from the aluminum alloy 2024T4. Because the detection of fatigue damage in composite materials is a complex problem, computed tomography was used to evaluate the degradation of the composite material. Experimental and numerical comparative analyses of the static strength and fatigue life of hybrid joints with adhesive and mechanical joints confirmed the assumptions made.

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“…There are many types of joining techniques and their applications are based on the required strength of the joints. The most common techniques are mechanical fasteners (e.g., rivets, bolts, pins, and screws), adhesive bonding, and hybrid joining [3,4,5]. On one side, the great advantage of mechanical fasteners is their ease of assembling and disassembling while allowing for reliable inspection.…”

Section: Introductionmentioning

confidence: 99%

An Experimental and Numerical Study of Repairs on Composite Substrates with Composite and Aluminum Doublers Using Riveted, Bonded, and Hybrid Joints

Pitta

Roure

Crespo³

et al. 2019

Materials

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In this work, experimental and numerical analyses of repairs on carbon fiber reinforced epoxy (CFRE) substrates, with CFRE and aluminum alloy doublers typical of aircraft structures, are presented. The substrates have a bridge gap of 12.7 mm (simulated crack), repaired with twin doublers joined with riveted, adhesive bonded, and hybrid joints. The performance of the repairs using different doubler materials and joining techniques are compared under static loading. The experimental results show that riveted joints have the lowest strength, while adhesive bonded joints have the highest strength, irrespective of the doubler material. Finite element analysis (FEA) of the studied joints is also performed using commercial FEA tool Abaqus. In the FEA model, point-based fasteners are used for the rivets, and a cohesive zone contact model is used to simulate the adhesive bond. The FEA results indicate that the riveted joints have higher tensile stresses on the metal doublers compared to the composite doublers. As per the failure modes, interestingly, for hybrid joints using composite doublers, the doublers fail due to net-section failure, while, for hybrid joints using metal doublers, it is the composite substrate that fails due to net-section failure. This suggests vulnerability of the composite structures to mechanical fastener holes. Lastly, the Autodesk Helius composite tool is used for prediction of first-ply failure and ply load distribution, and for progressive failure analysis of the composite substrate.

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Fiber Reinforced Composite Structure with Bolted Joint – A Review

Cited by 15 publications

References 45 publications

Connection Confinement of Bolted Fibre-Reinforced Polymer Bamboo Composite

Connection Confinement of Bolted Fibre-Reinforced Polymer Bamboo Composite

Influence of the Arrangement of Mechanical Fasteners on the Static Strength and Fatigue Life of Hybrid Joints

An Experimental and Numerical Study of Repairs on Composite Substrates with Composite and Aluminum Doublers Using Riveted, Bonded, and Hybrid Joints

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