Influence of through-thickness reinforcement aspect ratio on mode I delamination fracture resistance

Kravchenko, Sergii G.; Kravchenko, Oleksandr G.; Carlsson, Leif A.; Pipes, R. Byron

doi:10.1016/j.compstruct.2015.01.032

Cited by 14 publications

(4 citation statements)

References 23 publications

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“…Cross-section planar model through thickness is often used to investigate delamination of Z-pinned laminates [37,38], adhesively bonded joint [39,40] and cylindrical contact problem [41]. The cross-section through thickness is a plane with zero thickness extracted from xz plane for 0°-lamina of CFRP laminate interference-fit joint along y direction.…”

Section: Finite Element Modeling For Rve and Ehmmentioning

confidence: 99%

Micromechanical analysis for microscopic damage initiation in fiber/epoxy composite during interference-fit pin installation

et al. 2016

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Section: Finite Element Modeling For Rve and Ehmmentioning

confidence: 99%

Micromechanical analysis for microscopic damage initiation in fiber/epoxy composite during interference-fit pin installation

et al. 2016

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“…the commonly used interlaminar fracture testing using double cantilever beam tests, modified to ensure that the test determines the resistance to a running crack, elucidating the development of the bridging zone [1,2,[10][11][12][13]. It continues to be used as a suitable coupon test for more detailed probing of effects of structural parameters such as, for example, the aspect ratio of the embedded microfastener [14]. As regards more complex loading cases, the most commonly used test element has been the T-joint [15,16].…”

Section: Model Development Strategymentioning

confidence: 99%

Use of microfasteners to produce damage tolerant composite structures

Partridge¹,

Hallett²

2016

Phil. Trans. R. Soc. A.

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The paper concerns the mechanical performance of continuous fibre/thermosetting polymer matrix composites reinforced in the through-thickness direction with fibrous or metallic rods or threads in order to mitigate against low delamination resistance. Specific illustrations of the effects of microfasteners in reducing delamination crack growth are made for Z-pinned and tufted composites. Response to loading in such ‘structured materials’ is subject to multiple parameters defining their in-plane and out-of-plane properties. Single microfastener mechanical tests are well suited to establish the crack bridging laws under a range of loading modes, from simple delamination crack opening to shear, and provide the basis for predicting the corresponding response of microfastener arrays, within a given material environment. The fundamental experiments on microfasteners can be used to derive analytical expressions to describe the crack bridging behaviour in a general sense, to cover all possible loadings. These expressions can be built into cohesive element constitutive laws in a finite-element framework for modelling the effects of microfastener arrays on the out-of-plane mechanical response of reinforced structural elements, including the effects of known manufacturing imperfections. Such predictive behaviour can then be used to assess structural integrity under complex loading, as part of the component design process.This article is part of the themed issue ‘Multiscale modelling of the structural integrity of composite materials’.

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“…Alternatively, some solutions have been explored to mitigate the problem of low out-of-plane delamination resistance, such as the incorporation of foreign materials in the out-of-plane direction as reinforcement material (e.g., stainless-steel [12][13][14][15] and carbon yarns [16][17][18][19][20]). These additions resulted in increased mechanical integrity, where higher delamination resistance was observed [21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Material-Enabled Impact Detection and Damage Localisation System Using Shape Memory Alloy Tufted Composites

Adeyemi,

Khor,

Ciampa

2023

Sensors

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Shape memory alloy (SMA) tufted composites have shown a significant improvement of the mechanical strength, fracture toughness, and delamination resistance of structural joints. This paper investigated the self-sensing functionality of SMA tufted carbon/epoxy composite T-joints to enable in situ strain monitoring for the detection of low-velocity impacts. Indeed, large deformations in the tufted composite due to impacts caused abrupt changes in electrical resistance of SMA filaments, which were used to trigger the detection system. An Arduino Mega controller was programmed to simultaneously extract and process real-time electrical resistance recordings from SMA tufts during impact tests conducted at 5 J and 10 J. Experimental results showed that the proposed SMA-enabled detection system can capture accurately the time of the impact and localise the delamination onset, thus demonstrating the truly multifunctional capabilities of proposed SMA tufted composites.

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Influence of through-thickness reinforcement aspect ratio on mode I delamination fracture resistance

Cited by 14 publications

References 23 publications

Micromechanical analysis for microscopic damage initiation in fiber/epoxy composite during interference-fit pin installation

Micromechanical analysis for microscopic damage initiation in fiber/epoxy composite during interference-fit pin installation

Use of microfasteners to produce damage tolerant composite structures

Material-Enabled Impact Detection and Damage Localisation System Using Shape Memory Alloy Tufted Composites

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