Experimental observations and finite element modelling of damage initiation and evolution in carbon/epoxy non-crimp fabric composites

Mikhaluk, D.S.; Truong, Thanh; Borovkov, A. I.; Lomov, Stepan Vladimirovitch; Verpoest, Ignace

doi:10.1016/j.engfracmech.2007.03.010

Cited by 65 publications

(44 citation statements)

References 28 publications

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“…Moreover, stitching fibres and z-pins have a diameter of approximately 0.3 mm and their presence forces fibres to deviate around them, potentially decreasing their compression strength by virtue of the increased fibre waviness. The unavoidable presence of resin-rich regions around the reinforcement has also been shown to act as damage initiation sites [7].…”

Section: Introductionmentioning

confidence: 99%

An investigation of Mode I and Mode II fracture toughness enhancement using aligned carbon nanotubes forests at the crack interface

Falzon¹,

Hawkins

Huynh

et al. 2013

Composite Structures

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A novel approach for introducing aligned multi-walled carbon nanotubes (MWCNTs) in a carbon-fibre composite pre-impregnated (prepreg) laminate, to improve the through-thickness fracture toughness, is presented. Carbon nanotube (CNT) 'forests' were grown on a silicon substrate with a thermal oxide layer, using a chemical vapour deposition (CVD) process. The forests were then transferred to a pre-cured laminate interface, using a combination of pressure and heat, while maintaining through-thickness CNT alignment. Standard Mode I and four-point bend end-notched flexure Mode II tests were undertaken on a set of specimens and compared with pristine specimens.Mode I fracture toughness for T700/M21 laminates was improved by an average of 31% while for T700/SE84LV specimens, an improvement of 61% was observed. Only T700/M21 specimens were tested in Mode II which yielded an average fracture toughness improvement of 161%. Scanning Electron Microscopy (SEM) showed good wetting of the CNT forest as well as evidence of penetration of the forest into the adjacent plies.

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Section: Introductionmentioning

confidence: 99%

An investigation of Mode I and Mode II fracture toughness enhancement using aligned carbon nanotubes forests at the crack interface

Falzon¹,

Hawkins

Huynh

et al. 2013

Composite Structures

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show abstract

“…Many approaches are reported in literature to monitor acoustic emission during testing of fiber-reinforced materials [93,[217][218][219][220][221][222][223][224][225][226][227][228][229][230][231][232][233][234]. In general, all mechanisms described in Sect.…”

Section: Acoustic Emissionmentioning

confidence: 99%

“…The textile architecture of the fiber reinforcement (e.g., woven fabrics, noncrimp fabrics, and braids) cause a complex multiaxial residual stress state after curing which needs to be accounted for. Since this involves calculations on various length scales, classical homogenization approaches can effectively be combined with finite element based routines to account for such multiscale problems [90,[93][94][95][96].…”

Section: Quasi-static Failure Including Growth Of Damage Damage Mechmentioning

confidence: 99%

Failure of Fiber-Reinforced Composites

Sause

2016

In Situ Monitoring of Fiber-Reinforced Composites

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“…For quarter point singular elements as shown in Figure 1(b), mixed mode SIFs can be estimated as follows using the COD and CSD as [8] and [35][36][37][38][39][40] …”

Section: Displacement Correlation Methods (Dcm)mentioning

confidence: 99%

Probabilistic fracture investigation of symmetric angle ply laminated composite plates using displacement correlation method

Lal

Shailesh

2016

Curved and Layered Structures

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Abstract:The second order statistics of mixed mode stress intensity factors (MSIF) of single edge V-notched angle ply laminated composite plate subjected to uniaxial tensile load with uncertinity in the system properties using displacement correlation method (DCM) is evaluated. The random system properties such as material properties, crack opening and crack length are modelled as combined uncorrelated and correlated random system variables. A C nite element method (FEM) based on higher order shear deformation plate theory (HSDT) is used for basic formulation. The Taylor series based rst order perturbation technique (FOPT), second order perturbation technique (SOPT) are used and direct Monte Carlo simulation (MCS) is performed to evaluate the statistics (mean and coe cient of variance) of the mixed mode SIFs. The present work signi es the accurate analysis of frature behaviour by in uence of di erent random variables and bre orientations on the fracture behaviour in angle ply laminates.

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Experimental observations and finite element modelling of damage initiation and evolution in carbon/epoxy non-crimp fabric composites

Cited by 65 publications

References 28 publications

An investigation of Mode I and Mode II fracture toughness enhancement using aligned carbon nanotubes forests at the crack interface

An investigation of Mode I and Mode II fracture toughness enhancement using aligned carbon nanotubes forests at the crack interface

Failure of Fiber-Reinforced Composites

Probabilistic fracture investigation of symmetric angle ply laminated composite plates using displacement correlation method

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