7.4 Notched strength of woven fabric-based CFRP composites

Belmonte, H. M. S.; Ogin, S.L.; Smith, Paul A.; Lewin, R

doi:10.1680/apcfsaic.31227.0044

Cited by 4 publications

(5 citation statements)

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“…U-shape edge notches were introduced to every 4 mm interval notch length, ranging from 4, 8 and 12 mm and tested to failure. The maximum load was taken as failure load of testing coupons in the respective notched length, similar approach used in Belmonte [10] and Lee & Ahmad [15]. The maximum load of SEN coupons tested was averaged from the triplicate testing coupons and fracture energy in each notch length specified were tabulated in Table 4.…”

Section: Resultsmentioning

confidence: 99%

“…The strain values were recorded by the external data logger, and shear modulus was determined by Eq. ( 4) [10] where ε y is longitudinal strain and ε x is the lateral strain (extracted from connected data-logger). In addition, σ ult is the applied stress at failure from Eq.…”

Section: Determination Of Materials Propertiesmentioning

confidence: 99%

“…The compliance against notch length graph was plotted, and the second order polynomial expression was differentiated to obtain dC/da from Eq. ( 6) [10]. Then, fracture energy was taken by averaging fracture energy of 4 mm, 8 mm, and 12 mm notch length.…”

Section: Determination Of Cohesion Fracture Energymentioning

confidence: 99%

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Material Properties and Fracture Energy of Kenaf FRP Composites

Omar¹,

Sugiman²,

Ahmad³

2022

Proceedings of the First Mandalika International Multi-Conference on Science and Engineering 2022, MIMSE 2022 (Civil and Archit

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The incorporations of synthetic fibers have raised worrying concerns, so an alternative material which is inexpensive and ecological resources is proposed. Kenaf fiber has high tensile modulus and elongation at break and potentially to be used as reinforcing fibers in FRP composites to replace synthetic fibers. This study aims to investigate the mechanical properties (unnotched strength, elastic modulus, Poisson's ratio, shear modulus and fracture energy) of woven fabric kenaf fiber-reinforced polymer (KFRP) testing coupons (notched and unnotched), usually employed within numerical modelling. A quasi-static tensile test was performed to investigate the variations of KFRP coupons, such as woven architecture types and KFRP thickness with cross-ply arrangements. Sikadur-31 (epoxy resin) was used as a matrix in KFRP coupons. As kenaf volume fractions and KFRP coupon thickness increased, mechanical properties of KFRP coupons were substantially improved.

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Section: Resultsmentioning

confidence: 99%

Section: Determination Of Materials Propertiesmentioning

confidence: 99%

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Material Properties and Fracture Energy of Kenaf FRP Composites

Omar¹,

Sugiman²,

Ahmad³

2022

Proceedings of the First Mandalika International Multi-Conference on Science and Engineering 2022, MIMSE 2022 (Civil and Archit

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“…Another independent elastic property to be determined was shear modulus, G xy of all testing series designation. Shear modulus was highly dependent upon nature of fibre orientation where cross-ply lay-up coupons were determined by testing unnotched coupons with diagonal cut at 45° to woven fibre orientation [3]. On the other hand, shear modulus for quasi-isotropic lay-up is directly determined with data obtained from associated unnotched coupon [16].…”

Section: Experimental Frameworkmentioning

confidence: 99%

“…The Malaysian government has allocated RM11 millions for research and further development on the Kenaf-based industry under the 10th Malaysia plan (2011)(2012)(2013)(2014)(2015) in recognition of kenaf as a commercially viable crop. Woven fabric fibre was found to be more attractive as reinforcing fibres due to the ability of crimp to arrest the crack and great resistance against impact and fatigue [3].…”

Section: Introductionmentioning

confidence: 99%

XFEM modelling of single-lap Kenaf fibre composite hybrid joints under quasi-static loading

Yee

Ahmad

2018

Plastics, Rubber and Composites

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The present paper aims to predict the bearing stress at failures of woven fabric kenaf fibre reinforced polymer with single-lap hybrid joints under quasi-static testing. Testing series investigated includes a variation of joint types, normalised W/d, lay-up types, plate thickness and bolt loads. Initially, cohesive failures appeared within adhesive layer, followed by nettension failure mode in all testing series investigated associated with stress concentration. Strength prediction was carried out subsequently by implementing XFEM framework with an embedded traction-separation relationship within ABAQUS CAE. The experimental datasets and XFEM results were evaluated where good agreements were found in the combination of cross ply and thicker coupon with a discrepancy of less than 5%.

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