The influence of a thermoplastic toughening interlayer and hydrothermal conditioning on the Mode-II interlaminar fracture toughness of Carbon/Benzoxazine composites

Nash, N.H.; Young, Trevor; Stanley, W.F.

doi:10.1016/j.compositesa.2015.11.010

Cited by 42 publications

(30 citation statements)

References 60 publications

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“…For the wet ENF specimens (NPC), the load drops slightly after reaching the critical load and the crack propagates in a stable manner due to an increase of matrix ductility. 60 For the case of the PC ENF specimens, a stable crack propagation was observed in both dry and wet conditions. It is observed that dry and wet PC specimens exhibit a decrease in their critical load with respect to NPC samples.…”

Section: Resultsmentioning

confidence: 90%

Effect of seawater ageing on interlaminar fracture toughness of carbon fiber/epoxy composites containing carbon nanofillers

Rodríguez‐González

Rubio-González

Ku‐Herrera

et al. 2018

Journal of Reinforced Plastics and Composites

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This work reports the influence of seawater ageing on the mode I and mode II interlaminar fracture toughness ([Formula: see text] and [Formula: see text]) of prepreg-based unidirectional carbon fiber/epoxy laminates containing carbon nanofillers. Double cantilever beam and end notched flexure specimens were fabricated from composite laminates containing multiwalled carbon nanotubes and/or reduced graphene oxide at their middle plane interface. Experimental results showed that the addition of carbon nanofillers moderately increased the [Formula: see text] and [Formula: see text] propagation of composite laminates before and after their immersion in seawater with respect to the reference laminate under dry condition. For double cantilever beam and end notched flexure specimens aged in seawater, it was observed that [Formula: see text] and [Formula: see text] increased by 57% and 13% for specimens with multiwalled carbon nanotube/reduced graphene oxide hybrid combination, 39% and 4% for specimens with multiwalled carbon nanotubes and 53% and 8% for specimens with reduced graphene oxide respectively, as a consequence of the plasticization effect of seawater immersion on the matrix. Fracture surface examination by scanning electron microscopy revealed interlaminar failure associated to mode I and mode II delamination and toughening mechanisms produced by the multiwalled carbon nanotubes and reduced graphene oxide at delaminated regions of composite laminates.

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Section: Resultsmentioning

confidence: 90%

Effect of seawater ageing on interlaminar fracture toughness of carbon fiber/epoxy composites containing carbon nanofillers

Rodríguez‐González

Rubio-González

Ku‐Herrera

et al. 2018

Journal of Reinforced Plastics and Composites

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“…This has resulted to reduction in the interfacial strength between the fibres and matrix due to the presence of the water into the interface. Hence, it increased matrix ductility [45]. In the case of stitched composites, FBVEs samples had the highest resistance to crack initiation of fracture toughness for both dry and wet composites than unstitched composites.…”

Section: Fracture Energymentioning

confidence: 99%

“…ones. This behaviour could be attributed to the reduction in fibre/matrix interfacial strength due to the moisture absorption that resulting a reduction to crack propagation; this however improved the resistance to crack initiation because of increasing in matrix ductility [45]. The results for stitched composites of FBVEs are shown in Fig.…”

Section: Scanning Electron Microscopy (Sem)mentioning

confidence: 99%

Investigation into Mode II interlaminar fracture toughness characteristics of flax/basalt reinforced vinyl ester hybrid composites

Almansour

Dhakal

Zhang

2018

Composites Science and Technology

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“…Interlaminar failure, better known as delamination, can introduce a significant reduction of structural stiffness without external signs of damage, resulting in a catastrophic failure [21]. The interlaminar properties of the laminated composites depend on the characteristics of the matrix and the interface, which represents an important source of weakness and generates shear stresses [22]. The use of nanoparticles is an alternative to improve the hardness of the matrix, consequently impacting a significant increase in fracture resistance and extending the life of the material [2].…”

Section: Introductionmentioning

confidence: 99%

Processing, thermal and mechanical behaviour of PEI/MWCNT/carbon fiber nanostructured laminate

Santos

Ribeiro

Hein

et al. 2017

Mater. Res. Express

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In this work, nanostructured composites of polyetherimide (PEI) with addition of functionalized multiwall carbon nanotube (MWCNT) were processed via solution mixing. After processing, these nanocomposites were evaluated by thermogravimetry (TGA), dynamic-mechanical analysis (DMA), scanning electron microscopy (SEM) and atomic force microscopy (AFM). Subsequently, the nanocomposite was processed with carbon fibers by using hot compression molding. In order to evaluate interlaminar fracture strength, the processed laminates were mechanically evaluated by interlaminar shear strength (ILSS) and compression shear test (CST). Also, the Weibull distribution was employed to help in the statistical treatment of the data obtained from the mechanical tests. With regards to the fracture of the specimens, optical microscopy was used for the evaluation of the material. The addition of 1 wt% of MWCNT in the polymer matrix increased both thermal stability and viscoelastic behavior of the material. These improvements positively impacted the mechanical properties, generating a 16% and 58% increase in the short-beam strength and apparent interlaminar shear, respectively. In addition, it can be verified from morphological analysis of the fracture a change in the failure mode of the laminate by the incorporation of MWCNT. This behavior can be proven from CST test where there was no presence of the shear force by compression.

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The influence of a thermoplastic toughening interlayer and hydrothermal conditioning on the Mode-II interlaminar fracture toughness of Carbon/Benzoxazine composites

Cited by 42 publications

References 60 publications

Effect of seawater ageing on interlaminar fracture toughness of carbon fiber/epoxy composites containing carbon nanofillers

Effect of seawater ageing on interlaminar fracture toughness of carbon fiber/epoxy composites containing carbon nanofillers

Investigation into Mode II interlaminar fracture toughness characteristics of flax/basalt reinforced vinyl ester hybrid composites

Processing, thermal and mechanical behaviour of PEI/MWCNT/carbon fiber nanostructured laminate

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