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

Ferreira, Luís Miguel Santos; Graciani, E.; Parı́s, F.

doi:10.1016/j.compstruct.2016.04.022

Cited by 18 publications

(18 citation statements)

References 10 publications

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“…The out-of-plane undulations (in non-crimp fabrics), which are present due to the small binder yarn, have been modelled by either introducing a locally curved region at the corresponding locations underneath the binder yarn as in González et al., 38 or by considering a straight lamina with changes in the local material axis system representing the fiber waviness as in literature. 39,40 The stitching yarn is modelled in literature 10,23,36,37 by straight and circular segments with a circular cross-section in the through-the-thickness segment and an elliptical cross-section in the top segment, and with a full fiber compacted state for each cross-section. The simplified modelling for both stitching yarn and lamina resulted in interpenetrations, which were resolved in the finite element model construction by the adoption of a mesh superposition techniques.…”

Section: Introductionmentioning

confidence: 99%

Automated RVE computations for evaluation of microdamage initiation in structural stitched non-crimp fabric composites

Pierreux

Hemelrijck

Massart

2020

Journal of Composite Materials

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This contribution presents an approach to generate unit-cell models of structural stitched non-crimp fabric composites. Resin-rich regions and out-of-plane undulations caused by the stitching yarn are represented by initially straight discretised lines, while the stitching yarn is represented initially by a single discretised line which can be transformed into a multi-line configuration to model stitch cross-section variations. The discretised lines are shaped by geometrical operations with a contact treatment and boundary conditions being used to account, respectively, for line interactions and to control the shape of the bottom and top surfaces of each lamina respectively. A fiber-reinforced distorted zone with local variations in fiber volume fraction and fiber direction is modelled in cross-sections of the lamina in a post-processing step. Models for different stacking sequences and stitching parameters are then automatically generated and subsequently being in the stiffness calculation and damage initiation assessment using finite element based mechanical simulations.

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Section: Introductionmentioning

confidence: 99%

Automated RVE computations for evaluation of microdamage initiation in structural stitched non-crimp fabric composites

Pierreux

Hemelrijck

Massart

2020

Journal of Composite Materials

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“…Ferreira et al. 10 studied the compressive failure mechanisms of [0/90]n NCF composites using 3D FE model. They applied different failure criteria to each constituent to predict the compressive longitudinal strength.…”

Section: Introductionmentioning

confidence: 99%

A multiscale framework for predicting the mechanical properties of unidirectional non-crimp fabric composites with manufacturing induced defects

Rouf

Worswick

Montesano

2020

Journal of Composite Materials

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The aim of this study was to evaluate the effect of manufacturing induced in-plane tow misalignment and out-of-plane tow crimp on the mechanical properties of a heavy-tow unidirectional non-crimp fabric (UD-NCF) composite. The elastic constants and failure onset (strength) are predicted by employing a multiscale computational approach. Micro-scale finite element (FE) models that explicitly represent the fibers and matrix within the tow microstructure were used to predict the effective properties of the tow. Meso-scale FE models comprised of the homogenized tows and surrounding matrix were used to predict the properties of a UD NCF composite lamina. Four meso-scale models, identified as ideal, crimp, misalignment and real, were considered in this study. No manufacturing defects were represented in the ideal model, while out-of-plane crimp, in-plane misalignment and both out-of-plane crimp and in-plane misalignment were accounted for in the crimp model, misalignment model and real model, respectively. Predicted lamina stiffness based on the real model are found to be in an excellent agreement with available experimental data, which was not always the case for the other three models. The longitudinal and transverse strength predictions are found to be dependent on the chosen local failure criteria for each model. Max-stress and Puck’s fiber failure criteria provide an excellent estimate of longitudinal strength while the Puck’s inter-fiber failure and Tsai-Hill criteria predict transverse strength with good accuracy. The feasibility to accurately predict the mechanical properties of heavy tow non-crimp fabric composites by incorporating their inherent micro-structural defects is demonstrated in this study.

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“…Yang et al 5 compared the compression property of 3-D orthogonal woven glass fiber composites with biaxial warp-knitted glass fiber composites and found that the compression strength of the former was 23.40% higher than that of the latter, and the modulus of the former was 4.9% lower than that of the latter. Moreover, some researchers 6 –9 analyzed deeply the failure mechanisms of multiaxial composites subjected to compression, and the microscale and mesoscale finite element models were established to optimize the composite structure.…”

Section: Introductionmentioning

confidence: 99%

Temperature effect on compression property of multiaxial warp-knitted composites

Yang

Wang

Gao

et al. 2019

High Performance Polymers

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The wind turbine blades are exposed to various environments all the year round, especially temperature variations during the four seasons. To study the influences of temperatures on the mechanical properties of composite materials, the compression property in the 0°, 45°, and 90° directions of the multiaxial (triaxial and quadaxial) glass fiber warp-knitted composites at −30°C, 0°C, 20°C, and 40°C was analyzed, respectively. The stress–strain curves, strength, modulus, failure strain, and the relationship between strength and temperature were obtained. The results indicated that the compression performance decreased with the increase of temperature, and the effect of temperature on quadaxial composite was more significant than that of the triaxial composite. In addition, the failure mechanisms were also analyzed according to the fracture modes and scanning electron microscopic morphologies of composites.

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

Cited by 18 publications

References 10 publications

Automated RVE computations for evaluation of microdamage initiation in structural stitched non-crimp fabric composites

Automated RVE computations for evaluation of microdamage initiation in structural stitched non-crimp fabric composites

A multiscale framework for predicting the mechanical properties of unidirectional non-crimp fabric composites with manufacturing induced defects

Temperature effect on compression property of multiaxial warp-knitted composites

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