Micro-mechanical modelling of shear-driven fibre compressive failure and of fibre kinking for failure envelope generation in CFRP laminates

Gutkin, Renaud; Pinho, S.T.; Robinson, P.; Curtis, P.

doi:10.1016/j.compscitech.2010.03.009

Cited by 87 publications

(69 citation statements)

References 17 publications

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“…The model is then subjected to several combinations of longitudinal compression and in-plane shear [4]. The softening induced by matrix microcracking is represented using an elastic-plastic constitutive law for the matrix layer (with a yield strength t Y ) and the fibres use a continuum damage model, where the stress carried by a fibre in compression is reduced following a linear softening law once its strength is reached.…”

Section: (I) Experimental Observationsmentioning

confidence: 99%

“…Tsai-Wu and maximum stress; physically based, e.g. Puck and LaRC05); see the study of Gutkin et al [4] for a discussion. [3].…”

Section: Introductionmentioning

confidence: 99%

“…[3]. (c) Failure envelope under combined longitudinal compression and shear; the longitudinal and shear stresses are non-dimensionalized by their respective strength X C and S L [4].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

On longitudinal compressive failure of carbon-fibre-reinforced polymer: from unidirectional to woven, and from virgin to recycled

Pinho

Gutkin

Pimenta

et al. 2012

Phil. Trans. R. Soc. A.

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Modelling the longitudinal compressive failure of carbon-fibre-reinforced composites has been attempted for decades. Despite many developments, no single model has surfaced to provide simultaneously a definitive explanation for the micromechanics of failure as well as validated predictions for a generic stress state. This paper explores the reasons for this, by presenting experimental data (including scanning electron microscopic observations of loaded kink bands during propagation, and brittle shear fracture at 45• to the fibres) and reviewing previously proposed micromechanical analytical and numerical models. The paper focuses mainly on virgin unidirectional (UD) composites, but studies for woven and recycled composites are also presented, highlighting similarities and differences between these cases. It is found that, while kink-band formation (also referred to in the literature as microbuckling) is predominant in UD composites under longitudinal compression, another failure mode related to the failure of the fibres can be observed experimentally. It is also shown that the micromechanics of the failure process observed in UD composites is similar to that in other fibre architectures, hence encouraging the adaptation and application of models developed for the former to the latter.

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Section: (I) Experimental Observationsmentioning

confidence: 99%

“…Tsai-Wu and maximum stress; physically based, e.g. Puck and LaRC05); see the study of Gutkin et al [4] for a discussion. [3].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

On longitudinal compressive failure of carbon-fibre-reinforced polymer: from unidirectional to woven, and from virgin to recycled

Pinho

Gutkin

Pimenta

et al. 2012

Phil. Trans. R. Soc. A.

Self Cite

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show abstract

“…A first crack may be started by shear fracture of the fibres, followed by rotation of the fibres and in-plane shearing of the matrix at the crack tip, which in turn promotes kink band development [10]. However, depending on the material, a kink band can also be promoted prior to fibre failure by an initial fibre misalignment [11]. Thus, compressive failure envelopes for combined compression/shear are strongly dependent on the material investigated, see Figure 1, which shows a selection of experimental results available in the literature [12], [13], [14].…”

Section: Fibre Compressive Failurementioning

confidence: 99%

“…The angle qs 0 ϕ identifies the fracture surface orientation for pure transverse QS compressive failure. This angle needs to be measured experimentally and it is typically found that (12) However, from Equation (10) and Equation (11) Combining Equation (11) and Equation (13) (14) Thus, one of the following must also be valid:…”

Section: Matrix Compressive Failurementioning

confidence: 99%

Modelling of strain rate effects on matrix dominated elastic and failure properties of unidirectional fibre-reinforced polymer–matrix composites

Raimondo

Iannucci

Robinson

et al. 2012

Composites Science and Technology

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Microscale and mesoscale modeling for compressive failure in unidirectional carbon fiber reinforced polymer composites with random distribution of fiber misalignments

Xie,

Ning

2024

Polymer Composites

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Compressive strength and failure mode of carbon fiber reinforced polymer (CFRP) composites are affected by the severity of fiber misalignment. In this paper, numerical models based on computational micromechanics are proposed to investigate the correlation between fiber misalignment and compression failure. A single‐fiber micromodel including fiber, matrix, and interface phases is first developed to capture the influence of misalignment severity on the material failure mode. The failure longitudinal stress distribution in the fiber predicted by the micromodel indicates that the failure mode depending on the initial misalignment can be identified as uniform compression failure, compression‐bending combination collapse, and fiber buckle. A mesoscale 2D model with multiple fibers is then constructed to investigate the kink band formation. This model takes into account the distribution of fiber misalignments to capture the key geometric features of fiber misalignment that influent the compression failure in realistic composite materials at the structural scale. The results show that fiber misalignment angle amplitude, misalignment dispersion (characterized by the standard deviation), and misalignment wavelength are the key parameters of fiber misalignment, which have significant effects on compression strength and kink band geometry.Highlights Single‐fiber model to capture the effect of misalignment severity on failure mode. Multi‐fiber model with randomly distributed fiber misalignments. Failure mode depending on the severity of initial misalignment was identified. Key parameters of misalignment on compression strength and kink band geometry.

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Micro-mechanical modelling of shear-driven fibre compressive failure and of fibre kinking for failure envelope generation in CFRP laminates

Cited by 87 publications

References 17 publications

On longitudinal compressive failure of carbon-fibre-reinforced polymer: from unidirectional to woven, and from virgin to recycled

On longitudinal compressive failure of carbon-fibre-reinforced polymer: from unidirectional to woven, and from virgin to recycled

Modelling of strain rate effects on matrix dominated elastic and failure properties of unidirectional fibre-reinforced polymer–matrix composites

Microscale and mesoscale modeling for compressive failure in unidirectional carbon fiber reinforced polymer composites with random distribution of fiber misalignments

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