Bearing strength performance of mixed thin/thick-ply, quasi-isotropic composite laminates

Cameron, Christopher John; Larsson, Johan; Loukil, Mohamed Sahbi; Murtagh, Timothy; Wennhage, Per

doi:10.1016/j.compstruct.2020.113312

Cited by 14 publications

(5 citation statements)

References 22 publications

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“…The stress-displacement curve generated from the data can be used to evaluate the bearing stiffness of the samples (K p ). The stiffness is determined from the stress-strain curve with a gradient in the range of 5-5.5% bearing strain, where the stress-displacement curve is relatively linear for all the specimens [32]. As example, in Fig.…”

Section: Methodsmentioning

confidence: 99%

Pin-bearing mechanical behaviour of continuous reinforced Kevlar fibre composite fabricated via fused filament fabrication

2022

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In this study, the pin bearing behaviour of a 3D printed composite material with Kevlar reinforcement was analysed. Three different experimental tests were designed to determine the effects of fibre orientation, layer design, and fibre distribution along the specimen thickness. Furthermore, the pin-bearing strength and stiffness were analysed using statistical methods as analysis of variance. The results indicate a significant increase in bearing strength and stiffness for at least two fibre orientations, i.e. 0°and 90° with respect to the pin displacement. The results also highlight a no significant variation of strength and stiffness for parts produced adopting a mixed or single fibre orientation; finally, the findings do not indicate any significant influence of the fibre layer position inside the specimen, i.e. this parameter does not limit the freedom when designing a fibre-reinforced part.

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Section: Methodsmentioning

confidence: 99%

Pin-bearing mechanical behaviour of continuous reinforced Kevlar fibre composite fabricated via fused filament fabrication

2022

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“…In the paper, the numerical model of a thin-ply-laminated composite-bolted joint is created. At present, much research on thin-layer composites has been carried out, which contributes to further verification and improvement in the numerical model [4,[36][37][38][39][40][41]. The single-lap structure of thin-laminated composite material will retain its overall bearing capacity when damage occurs in contact between the laminate hole and the bolt.…”

Section: Analysis Of Progressive Failure Mechanism Of Single-lap Stru...mentioning

confidence: 99%

Modeling Progressive Damage and Failure of Single-Lap Thin-Ply-Laminated Composite-Bolted Joint Using LaRC Failure Criterion

Wang

et al. 2022

Materials

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Thin-ply composite failure modes also significantly differ from conventional ply composite failure modes, with the final failure mechanism switching from irregular progressive failure to direct fracture characterized by a uniform fracture with the reduction of the ply thickness. When open holes and bolt joints are involved, thin-ply-laminated composites exhibit more complex stress states, damage evolution, and failure modes. Compared to the experimental study of thin-ply-laminated composite-bolted joints, there are few reports about numerical analysis. In order to understand the damage evolution and failure mechanism of thin-ply-laminated composites jointed by single-lap bolt, a progressive damage model based on three-dimensional (3D) LaRC failure criterion combined with cohesive element is constructed. Through an energy-based damage evolution method, this model can capture some significant mechanical characteristics in thin-ply-laminated structures, such as the in situ effect, delamination inhibition, and fiber compressive kinking failure. The comparisons between the numerical predictions and experimental observations are made to verify the accuracy of the proposed model. It is found that the predicted stress-displacement curves, failure modes, damage morphologies, etc., are consistent with the experimental results, indicating that the presented progressive damage analysis method displays excellent accuracy. The predicted stress at the onset of delamination is 50% higher than that of the conventional thick materials, which is also consistent with experimental results. Moreover, the numerical model provides evidence that the microstructure of thin-ply-laminated composite performs better in uniformity, which is more conducive to inhibiting the intra-layer damage and the expansion of delamination damage between layers. This study on the damage inhibition mechanism of thin-ply provides a potential analytical tool for evaluating damage tolerance and bearing capabilities in thin-ply-laminated composite-bolted joints.

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“…The kink bands were noted to have initiated local delaminations at the adjacent ply interfaces. Another study has shown that a thin ply unidirectional T700 CFRP composite (~0.03-0.05mm thick) inhibits the onset of kink bands by up to 47% compared to a traditional 'thick ply' composite (0.1-0.2mm thick) of the same material [23]. This indicates that the kinking process is unstable in nature and once initiated within a 0° ply can be arrested by encountering a ply interface, then extending into a delamination.…”

Section: Introductionmentioning

confidence: 99%

Fractographic study into the effect of drilling damage on bearing mechanisms and performance in Carbon-Fibre epoxy composites

Greenhalgh

Canturri

Katafiasz

2021

Engineering Failure Analysis

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Bearing strength performance of mixed thin/thick-ply, quasi-isotropic composite laminates

Cited by 14 publications

References 22 publications

Pin-bearing mechanical behaviour of continuous reinforced Kevlar fibre composite fabricated via fused filament fabrication

Pin-bearing mechanical behaviour of continuous reinforced Kevlar fibre composite fabricated via fused filament fabrication

Modeling Progressive Damage and Failure of Single-Lap Thin-Ply-Laminated Composite-Bolted Joint Using LaRC Failure Criterion

Fractographic study into the effect of drilling damage on bearing mechanisms and performance in Carbon-Fibre epoxy composites

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