Finite element analysis of the effect of longitudinal debonding on stress redistributions around fibre breaks in randomly packed fibres

AhmadvashAghbash, Sina; Fazlali, Babak; Mehdikhani, Mahoor; Swolfs, Yentl

doi:10.1016/j.compscitech.2022.109586

Cited by 8 publications

(2 citation statements)

References 34 publications

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“…Recently, a 3D DEM with an interfacial cohesive contact model was developed based on experimental SFFTs [174]. The novel 3D FEM of AhmadvashAghbash et al [175,176] considers the significant interrelated phenomena during CF-epoxy debonding, including thermal residual stresses, frictional sliding, matrix crack and matrix plasticity, and does not pre-impose the debond length (see Figure 10). Their predicted stress recovery profiles were verified versus those obtained with Raman spectroscopy.…”

Section: Methodsmentioning

confidence: 99%

Methods and models for fibre–matrix interface characterisation in fibre-reinforced polymers: a review

AhmadvashAghbash,

Verpoest,

Swolfs

et al. 2023

International Materials Reviews

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The fibre-matrix interface represents a vital element in the development and characterisation of fibre-reinforced polymers (FRPs). Extensive ranges of interfacial properties exist for different composite systems, measured with various interface characterisation techniques. However, the discrepancies in interfacial properties of similar fibre-matrix systems have not been fully addressed or explained. In this review, first, the interface-forming mechanisms of FRPs are established. Following a discourse on three primary factors that affect the fibre-matrix interface, the four main interface characterisation methods (single-fibre fragmentation, single-fibre pull-out, microbond and fibre push-in/-out tests) are described and critically reviewed. These sections review various detailed data reduction schemes, numerical approaches, accompanying challenges and sources of reported scatter. Finally, following the assessment of several infrequent test methods, comprehensive conclusions, prospective directions and intriguing extensions to the field are provided.

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Section: Methodsmentioning

confidence: 99%

Methods and models for fibre–matrix interface characterisation in fibre-reinforced polymers: a review

AhmadvashAghbash,

Verpoest,

Swolfs

et al. 2023

International Materials Reviews

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“…Adding to these results, AhmadvashAghbash considered additionally interface debonding in his microscale model to characterize the stress concentration factor near broken fibres. 15 The stress concentration was found to depend on various parameters, such as local fibre volume fraction (and so minimal fibre distance), interface debonding or friction.…”

Section: Introductionmentioning

confidence: 99%

Stochastic modelling of continuous glass-fibre reinforced plastics–considering material uncertainty in microscale simulations

Vinot

Liebold²,

Usta³

et al. 2022

Journal of Composite Materials

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This paper presents a probabilistic micromechanics-based approach to simulate the influence of scatter sources in composite materials as an alternative to deterministic approaches. Focus is given to the effect of microscopic and macroscopic voids, material inhomogeneity induced by manufacturing processes and stochastic fibre patterns on the mechanical properties of continuous glass-fibre reinforced polymer components. Various periodic unit cells of neat resin and embedded fibre clusters are generated with random distributions of the abovementioned scatter sources, while the voids are represented by degrading locally the pristine properties in an element-wise manner. Subsequently, the models are mechanically loaded under transverse tension as an exemplary case and the resulting responses are correlated with the stochastic inputs. In particular, the relative influence of pore size, porosity and fibre/resin interface strength on the transverse tension modulus and strength of unidirectional composites are numerically investigated. The present approach is suggested as a computational efficient but reliable alternative to geometrical representations of imperfection in composite materials.

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Process-induced residual stress in a single carbon fiber semicrystalline polypropylene thin film

Parambil,

Chen,

Gillespie

2024

Composites Part A: Applied Science and Manufacturing

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Finite element analysis of the effect of longitudinal debonding on stress redistributions around fibre breaks in randomly packed fibres

Cited by 8 publications

References 34 publications

Methods and models for fibre–matrix interface characterisation in fibre-reinforced polymers: a review

Methods and models for fibre–matrix interface characterisation in fibre-reinforced polymers: a review

Stochastic modelling of continuous glass-fibre reinforced plastics–considering material uncertainty in microscale simulations

Process-induced residual stress in a single carbon fiber semicrystalline polypropylene thin film

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