Multiscale Stochastic Analysis of FRP based on variability in fiber volume fraction, epoxy stiffness and strength

Sanei, Seyed Hamid Reza; Jensen, Eric M.; Fertig, Ray S.

doi:10.2514/6.2015-1361

Cited by 2 publications

(3 citation statements)

References 33 publications

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“…A non-uniform V f also implies a different distribution of material properties, which is often neglected in modelling longitudinal tension. In contrast, the effect of local fibre volume fraction variability was shown to influence the failure behaviour in the transverse direction in unidirectional composites [4,21].…”

Section: Introductionmentioning

confidence: 88%

Microscale material variability and its effect on longitudinal tensile failure of unidirectional carbon fibre composites

Malgioglio

Pimenta

Matveeva

et al. 2021

Composite Structures

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Section: Introductionmentioning

confidence: 88%

Microscale material variability and its effect on longitudinal tensile failure of unidirectional carbon fibre composites

Malgioglio

Pimenta

Matveeva

et al. 2021

Composite Structures

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“…A total of four specimens are manufactured. Since inhomogeneities, e.g., voids and resin-rich areas, are expected to affect the mechanical response and thus the experimental results, [30][31][32] testing multiple specimens increases the significance of the obtained data. However, the parameters of the introduced analytical model are tuned in order to fit it to an arbitrary experimental reference.…”

Section: Specimen Manufacturingmentioning

confidence: 99%

“…They can affect the local damage formation threshold, e.g., the maximum allowable stress or strain. [29][30][31] It is reported in the literature that the stochastic distribution of these intrinsic properties in the specimen has not necessarily a monotone trend. 29 Arai et al 30 numerically obtained a non-uniformal distribution of the maximum stress in FRP and assumed, among others, a periodic microstructure.…”

Section: Heterogeneous Strength Distributionmentioning

confidence: 99%

An analytical approach to model transverse inter-fibre fracture evolution in cross-ply carbon fibre reinforced polymers laminates under a three-point bending test

Linke

Chakraborty

Göbel

et al. 2023

Journal of Composite Materials

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The prerequisite to equip structures with in situ electrical health monitoring systems in a meaningful manner is to estimate potential damage locations. In this context, an analytical approach to model the spatial and temporal evolution of transverse inter-fibre fractures (IFF) is exemplified for [Formula: see text] cross-ply laminates under three-point bending. The model is based on the tensile load in the bottom 90°-layer. The effective stress is computed directly from the specimen displacement, whereas the strength is considered to be periodically distributed due to material inhomogeneities along the specimen. The continuous comparison between the sinusoidal strength function and the effective stress allows modelling progressive damage in form of IFF. A modified Hann window is used to consider their effect to the bottom 90°-layer. Experiments with the same configuration are performed and the observed IFF evolution is used to tune the model parameters in an optimisation procedure, e.g., the peak separation of the sinusoid and the length of the Hann window. The comparison between model and experiment shows a high level of agreement. The model is thus capable to reproduce experiments with minimal computational effort. This makes it highly suitable as input for electrical monitoring models that rely on the continuous damage evolution of the investigated structure. In its current form, the model is limited to the specified configuration. However, the simple analytical approach allows it to be easily adapted. It is furthermore shown that progressive composite damage in terms of spatial and temporal evolution can be accurately described using an analytical approach.

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Multiscale Stochastic Analysis of FRP based on variability in fiber volume fraction, epoxy stiffness and strength

Cited by 2 publications

References 33 publications

Microscale material variability and its effect on longitudinal tensile failure of unidirectional carbon fibre composites

Microscale material variability and its effect on longitudinal tensile failure of unidirectional carbon fibre composites

An analytical approach to model transverse inter-fibre fracture evolution in cross-ply carbon fibre reinforced polymers laminates under a three-point bending test

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