Influence of a matrix crack on stress transfer to an α-alumina fibre in epoxy resin using FEA and photoelasticity

Johnson, Anbu Clemensis; Zhao, F.M.; Hayes, Shannon; Jones, Frank R.

doi:10.1016/j.compscitech.2005.12.027

Cited by 15 publications

(8 citation statements)

References 23 publications

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“…This effect is predominantly due to matrix plasticity. It can be seen from [8,9,13]. Fibre/matrix debonding with or without matrix cracking further decreases the reinforcing efficiency.…”

Section: Discussionmentioning

confidence: 99%

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The role of matrix cracks and fibre/matrix debonding on the stress transfer between fibre and matrix in a single fibre fragmentation test

Johnson

Hayes

Jones

2012

Composites Part A: Applied Science and Manufacturing

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The single fibre fragmentation test is commonly used to characterise the fibre/matrix interface. During fragmentation, the stored energy is released resulting in matrix cracking and/or fibre/matrix debonding.Axisymmetric finite element models were formulated to study the impact of matrix cracks and fibre/matrix debonding on the effective stress transfer efficiency (EST) and stress transfer length (STL). At high strains, plastic deformation in the matrix dominated the stress transfer mechanism. The combination of matrix cracking and plasticity reduced the EST and increased STL.For experimental validation, three resins were formulated and the fragmentation of an unsized and uncoupled E-glass fibre examined as a function of matrix properties.Fibre failure was always accompanied by matrix cracking and debonding. With the stiff resin, debonding, transverse matrix cracking and conical crack initiation were observed. With a lower modulus and lower yield strength resin the transverse matrix crack length decreased while that of the conical crack increased.

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“…This effect is predominantly due to matrix plasticity. It can be seen from [8,9,13]. Fibre/matrix debonding with or without matrix cracking further decreases the reinforcing efficiency.…”

Section: Discussionmentioning

confidence: 99%

“…Recently Behzadi et al [10] have studied the role of multiple fibre-breaks on the failure of a 0 o fibre composite. It has been reported that the formation of a matrix crack is influenced by cure temperature, matrix modulus, surface treatment of the fibres, and strain rate [3,4,[11][12][13]]. …”

Section: Introductionmentioning

confidence: 99%

The role of matrix cracks and fibre/matrix debonding on the stress transfer between fibre and matrix in a single fibre fragmentation test

Johnson

Hayes

Jones

2012

Composites Part A: Applied Science and Manufacturing

View full text Add to dashboard Cite

show abstract

“…The matrix and interface are thus unlikely to be able to cope with this, yet many models assume perfect bonding and an intact matrix [15,26,27]. Three scenarios or combinations thereof can occur: (1) the matrix yields [16,[19][20][21][22], (2) the fibre-matrix interface debonds [21,24,28], or (3) the matrix cracks in the fibre break plane [29][30][31][32]. Matrix yielding is typical in thermoplastic polymer matrix composites, and can also occur in thermosets.…”

Section: Introductionmentioning

confidence: 99%

Matrix cracks around fibre breaks and their effect on stress redistribution and failure development in unidirectional composites

Swolfs

McMeeking

Verpoest

et al. 2015

Composites Science and Technology

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Despite the crucial significance of failure prediction in composites, such an objective remains challenging, even in unidirectional (UD) systems. A strength model for UD composites was used that has great versatility in handling various matrix and fibre behaviours. This model includes a simplified superposition principle that was found to be reliable in predicting stress concentration factors irrespective of the presence of matrix cracks. The model revealed the negligible influence of matrix cracks on stress concentrations, ineffective length, cluster development and failure strain. The presence of matrix cracks can therefore be safely neglected in models for UD composites. This information is important for experimental validations and for advancing the state of the art in strength models for UD composites.

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“… ⁎ Tri-linear plastic strain via kinematic hardening conditions with steps (0,0; 0,60; 0.002,70) [m/m, MPa] [7] …”

Section: Mesh Density-related Datamentioning

confidence: 99%

Experimental and numerical dataset of Microbond test using optical fibres for strain

Dsouza

Antunes

Kakkonen³

et al. 2020

Data in Brief

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This data article provides useful information often required for numerical modeling of the so-called microbond tests. It includes the experimental and simulation data of the microbond testing using Fibre Bragg Grating (FBG) fibres for optical strains. Microbond testing was performed on five different droplets of varying embedded length and diameter to collect the data. Finite element simulation was carried out and modelling was validated, by using two variables force and strain, to collect the data. The output data of the fitted models is given and is also visualized via graphs of force-strain derivative curves. The data of the simulations is provided for different finite element mesh densities. Here, to clarify the type and form of the data for the use by readers, the energy distribution curves describing various functionalities of the droplet, fibre and interface are presented. For further reading, the interpretation and analysis of this data can be found in a research article titled “3D interfacial debonding during microbond testing: Advantages of local strain recording” (R. Dsouza et al., 2020) [1] .

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Influence of a matrix crack on stress transfer to an α-alumina fibre in epoxy resin using FEA and photoelasticity

Cited by 15 publications

References 23 publications

The role of matrix cracks and fibre/matrix debonding on the stress transfer between fibre and matrix in a single fibre fragmentation test

The role of matrix cracks and fibre/matrix debonding on the stress transfer between fibre and matrix in a single fibre fragmentation test

Matrix cracks around fibre breaks and their effect on stress redistribution and failure development in unidirectional composites

Experimental and numerical dataset of Microbond test using optical fibres for strain

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