Approximate analytical constitutive model for non-crimp fabric composites

Edgren, Fredrik; Asp, Leif

doi:10.1016/j.compositesa.2004.06.007

Cited by 33 publications

(15 citation statements)

References 8 publications

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“…An earlier investigation (Edgren and Asp, 2005) of the material described here showed that the typical size of the imperfection (fi bre tow wavelength, etc.) An earlier investigation (Edgren and Asp, 2005) of the material described here showed that the typical size of the imperfection (fi bre tow wavelength, etc.)…”

Section: In-plane Compressive Failurementioning

confidence: 67%

Damage progression in non-crimp fabric composites

Aap

Vārna

Marklund

2011

Non-Crimp Fabric Composites

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Section: In-plane Compressive Failurementioning

confidence: 67%

Damage progression in non-crimp fabric composites

Aap

Vārna

Marklund

2011

Non-Crimp Fabric Composites

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“…In the study by Edgren et al. 7 an analytical model based on Timoshenko beam theory was developed to represent tow crimp for a UD NCF composite. Corresponding ply level stiffness reduction factors were introduced into a CLPT framework.…”

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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“…Kang and Kim 11 investigated experimentally the deformation resistance and mechanisms of multiaxial non-crimp fabrics under bias extension loading. Edgren et al 12 and Edgren and Asp 13 studied the formation and development of the damage, revealing stress concentrations caused by 0° fiber bundle waviness. Chun et al 14 found that the through-the-thickness reinforcement can improve the resistance to delamination and in-plane and out-of-plane properties.…”

Section: Introductionmentioning

confidence: 99%

Temperature effects on the compression behavior and failure of 3-D MWK glass fabric-reinforced epoxy composites

Wang

Duan

et al. 2018

High Performance Polymers

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This article reports the temperature effects on the in-plane and out-of-plane compression behavior and failure of 3-D multiaxial warp-knitted glass fabric-reinforced epoxy composites. The damage and fracture morphology are observed from macroscopic and microscopic views, and the failure mechanism is demonstrated. The results show that the temperature has significant effect on in-plane and out-of-plane compression properties, the stress versus strain curves decline, and the properties decrease significantly with increasing the temperature. The temperature of 75°C is a key point, at which change in compression properties occurs, and at 150°C, the materials become plastic. Moreover, fiber architecture and loading modes are also important factors on compression properties of composites. The results also show that the damage and failure patterns vary with temperature, fiber architecture, and loading modes. Under in-plane compression, material A shows local 0° fiber layers delaminating and becomes softening and plasticity with increasing temperature. Material B shows delaminating between 0°, 90°, +45°, and −45° fiber layers along 45° angle and exhibits multiple delaminating at elevated temperatures. Under out-of-plane compression, material A shows multiple local shear fracture with 45° angle and experiences softening, roughness, and expansion at elevated temperatures. Material B exhibits shear brittle failure clearly, and delaminating dominates the main failure with increasing the temperature.

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Approximate analytical constitutive model for non-crimp fabric composites

Cited by 33 publications

References 8 publications

Damage progression in non-crimp fabric composites

Damage progression in non-crimp fabric composites

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

Temperature effects on the compression behavior and failure of 3-D MWK glass fabric-reinforced epoxy composites

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