Non-linear stress-strain behaviour of carbon fibre reinforced plastic laminates

Ditcher, A.K.; Rhodes, F E; Webber, J. P. H.

doi:10.1243/03093247v161043

Cited by 26 publications

(11 citation statements)

References 12 publications

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“…Therefore, the carbon fibre has been characterised by a longitudinal elastic modulus The tows were modelled with linear shear behaviour in the transverse plane (23-plane) and with non-linear shear behaviour in the longitudinal and transverse through-thickness planes (12-plane and 13-plane, respectively), because in these latter planes the behaviour of the tows under shear loads is affected by the resin, whose behaviour is also non-linear [3]. This non-linearity in the mechanical behaviour of the tows was introduced into the FE model by a bilinear approximation of the shear stress-strain curve obtained by Ditcher [16]. The change of slope was defined to occur at a value ðr Ã 12 Þ of 60 MPa of stress and 1.4% of strain, see Table 2.…”

Section: Mechanical Properties Of the Constituentsmentioning

confidence: 99%

Three dimensional finite element study of the behaviour and failure mechanism of non-crimp fabric composites under in-plane compression

Ferreira

Graciani

Parı́s

2016

Composite Structures

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Section: Mechanical Properties Of the Constituentsmentioning

confidence: 99%

Three dimensional finite element study of the behaviour and failure mechanism of non-crimp fabric composites under in-plane compression

Ferreira

Graciani

Parı́s

2016

Composite Structures

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“…A fiber volume content of ϕ des = 55% or ϕ true = 47% has been used, respectively. The influence of a reduction of E ⊥ and G ⊥ on the results caused by material non-linear effects [12,3] has been investigated. Only small deviations have been observed, so the material non-linearity is negligible and has been excluded in the following.…”

Section: Materials Parametersmentioning

confidence: 99%

Global stability failure of a 3D composite structure accompanied by unavoidable polymorphic uncertainties

Drieschner¹,

Wolf²,

Petryna³

2021

14th WCCM-ECCOMAS Congress

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In this study, a non-linear stability analysis of a carbon fiber reinforced plastic (CFRP) considering unavoidable polymorphic uncertainties is conducted. For the realistic incorporation of the uncertainties in the finite element model, thickness variations and geometrical inaccuracies have been detected in advance by non-destructive testing. For that, a structure made of CFRP has been designed. Additionally, the material parameters have been defined as dependent stochastic variables based on reference studies in the literature. The distinction in aleatory and epistemic uncertainties leads to different uncertainty models and to a computationally costly fuzzy-stochastic analysis. Strains and displacements have been measured in a symmetric three-point bending test and compared to the numerical predictions. In addition to the present uncertain parameters, a case study shows that the fiber volume content and a small pre-deformation should be taken into account to minimize the deviation from the experimental results.

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“…Material properties were based on high strength surface treated fibres in a 914 epoxy matrix [17]. A constant volume fraction of 60% was assumed.…”

Section: Materials Modellingmentioning

confidence: 99%

“…The material property data was taken from Reference [17] for 60 % volume fraction unidirectional high strength surface treated carbon fibres in 914 epoxy resin. The fibre direction modulus was taken as 131.7 GPa, the transverse modulus as 9 GPa and the Poisson's ratio as 0.335.…”

Section: Appendix: Details Of Materials Modellingmentioning

confidence: 99%

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Analysis of Shear Instability in Compression Due to Fibre Waviness

Wisnom

1993

Journal of Reinforced Plastics and Composites

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A non-linear finite element analysis of compression of unidirectional carbon fibre-epoxy with fibre waviness has been carried out. Beam elements were used to model the fibres, and plane stress elements were used to represent the transverse and shear properties of the composite. Non-linear shear stress-strain response, fibre bending stiffness, large deflections, and the rotation of the material axes due to both shear strain and rigid body rotation were included in the analysis.The results show that for waviness with long wavelengths the stress at onset of shear instability is controlled by the maximum fibre misalignment angle. The maximum compressive stress reduces significantly with increasing angle. At short wavelengths the maximum stress increases due to the additional support provided by the bending stiffness of the fibres. The effect of variable amplitude waviness was also investigated and found to depend on the distance over which the variation occurs. For gradual variation, the maximum compressive stress is largely controlled by the maximum misalignment angle; for rapid variation, it is more influenced by the average angle.

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Non-linear stress-strain behaviour of carbon fibre reinforced plastic laminates

Cited by 26 publications

References 12 publications

Three dimensional finite element study of the behaviour and failure mechanism of non-crimp fabric composites under in-plane compression

Three dimensional finite element study of the behaviour and failure mechanism of non-crimp fabric composites under in-plane compression

Global stability failure of a 3D composite structure accompanied by unavoidable polymorphic uncertainties

Analysis of Shear Instability in Compression Due to Fibre Waviness

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