Impact Response of Quasi-Isotropic Asymmetric Carbon Fabric/Epoxy Laminate Infused with MWCNTs

Singh, Nand K.; Rawat, Prashant; Singh, Kalyan

doi:10.1155/2016/7541468

Cited by 12 publications

(3 citation statements)

References 21 publications

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“…Singh et al. [37] have reported that in case of asymmetric laminate with quasi-isotropic lay-up for plain CFRP, absorbed energy and damage area are correspondingly increased by 13.53 % and reduced on doping of 2 wt. % of MWCNTs, while doping of 5 wt.…”

Section: Introductionmentioning

confidence: 99%

Effect of through thickness separation of fiber orientation on low velocity impact response of thin composite laminates

Sharma

Khan

Ramachandran

2019

Heliyon

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The effect of separation of fiber orientation through the thickness of thin composites on their low velocity impact response is studied. The composites are prepared using unidirectional glass fiber reinforced epoxy through hand layup followed by vacuum bagging. The two dissimilar layups of composites considered have separation of composite layers with fibers having the same and different orientations through the thickness. The composites are subjected to low velocity impact using a drop-weight testing machine. The composites are evaluated using different performance parameters such as damage degree, first damage and maximum forces, first cracking energy, bending stiffness, elastic strain energy, elastic, residual and maximum displacements, permanent deformation, square-root delaminated area, delamination length and width, and contact duration. Among the two composites, it is observed that [90/-45/45/0] composite in which two layers with fibers having 90° and 0° orientations separating by two layers with fibers having -45° and 45° orientations, levels of deformation are lower and recorded force and square-root delaminated area are higher and lower, respectively for the same level of impact energy. Whereas, in case of [0/90/90/0] composite in which two layers with fibers having 0° orientations separating by two layers with fibers having 90° orientations, recorded force is lower and deformation and square-root delaminated area are higher. The [0/90/90/0] composite is having a comparatively more lateral spread of delamination and inter-layer opening than that of [90/-45/45/0] composite considering extensional and bending stiffnesses along longitudinal (A11, D11) and transverse (A22, D22) directions. This facilitates that lateral spread of damage within composite can be decreased by separating two layers of composite with 90° and 0° fiber orientations by two layers with -45° and 45° fiber orientations, i.e., [90/-45/45/0] composite.

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Section: Introductionmentioning

confidence: 99%

Effect of through thickness separation of fiber orientation on low velocity impact response of thin composite laminates

Sharma

Khan

Ramachandran

2019

Heliyon

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“…al. [10] conducted the LVI experimental work on asymmetric CFRP laminate doped with MWCNTs and observed that 2wt.% was the optimum doping weight percentage and beyond which properties were degraded. CFRP laminate with 2wt.% MWCNTs showed 13.53% enhancement in energy absorption and reduction in pyramidal damage when compared with neat asymmetric CFRP laminate.…”

Section: Introductionmentioning

confidence: 99%

In-Plane Low Velocity Impact Behavior of GFRP Laminate

Mahesh

Singh

2020

MSF

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FRP laminates are used in several industries such as automobile, aircraft’s, spacecraft’s, defense and etc.., where high strength-to-weight ratio is the primary criteria. FRP laminates offer high design and material tailoring properties but are highly susceptible to delamination and debonding under out-of-plane low velocity impact which induces barely visible impact damage (BVID) inside the structures. A lot of research investigation is going on related to damage resistance behavior of FRP laminates under out-of-plane impact loading. But very less concentration is paid to the FRP laminates behavior under in-plane low impact loading. In this numerical analysis in-plane low velocity impact loading is carried out on a bidirectional plain woven glass fiber reinforced epoxy laminate (GFRP) using LS-DYNA. A hemispherical impactor of mass 5kg and diameter of 10mm is impacted at 0.5, 1.0 and 1.5m/sec velocity on [(00/900)/(+450/-450)/(+450/-450)/(00/900)]S layup design. Two boundary conditions complete edge and corner constraining boundary conditions are considered for numerical analysis. Force vs. time, energy vs. time, displacement vs. time plots are used to evaluate the analysis.

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“…Mechanical properties like modulus ( E ), hardness ( H ) and fracture toughness ( K IC ) of the polymer materials can be improved by addition of small volumes of high quality and high strength nano-particles like CNT, 24–26 graphene, GO, etc. The present work is an attempt to harness the mechanical properties of GO as reinforcement in bisphenol-A (BPA)-based polymer matrix nano-composites.…”

Section: Introductionmentioning

confidence: 99%

Improved mechanical performance of bisphenol-A graphene-oxide nano-composites

Bansal

Singh

Kumar

et al. 2017

Journal of Composite Materials

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Epoxy resins have been extensively utilized for mechanical strength applications in the field of aerospace, automobiles, marine, defence, etc. Improving the strength as well as fracture behaviour of the light weight materials is challenging. Present work is an attempt to enhance elastic modulus, hardness and fracture resistance simultaneously by reinforcing the epoxy (bisphenol-A) matrix with a new-age two-dimensional atomically thin graphene oxide filler. Wet chemical oxidation method was used to prepare graphene oxide sheets. Morphological study of the synthesized graphene oxide was carried out using scanning electron microscopy. Fourier-transformed infrared, ultraviolet–visible and Raman spectroscopic techniques were also employed to ascertain the synthesis of graphene oxide. The results confirmed the synthesis of well oxidized graphene oxide sheets. The prepared graphene oxide sheets were then sonicated in acetone solution to ensure better dispersion in the bisphenol-A graphene oxide nano-composite using 0.25, 0.5, 1.0 and 1.5 wt.% graphene oxide reinforcement. Solution mixing method was used to synthesize the polymer nano-composite. Scanning electron microscopy results revealed the smooth dispersion of graphene oxide in the bisphenol-A matrix. Nano-indentation of the bisphenol-A graphene oxide nano-composite showed a considerable jump in elastic modulus at 1 wt.% and hardness at 0.50 wt.% of graphene oxide reinforcement. Fracture resistance of bisphenol-A graphene oxide composite as represented by ratio of elastic modulus to hardness was enhanced by 24% as compared to the pristine bisphenol-A. Our results demonstrate a promising way to improve the mechanical characteristics of epoxy resins through graphene oxide reinforcement at low weight percentages.

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Impact Response of Quasi-Isotropic Asymmetric Carbon Fabric/Epoxy Laminate Infused with MWCNTs

Cited by 12 publications

References 21 publications

Effect of through thickness separation of fiber orientation on low velocity impact response of thin composite laminates

Effect of through thickness separation of fiber orientation on low velocity impact response of thin composite laminates

In-Plane Low Velocity Impact Behavior of GFRP Laminate

Improved mechanical performance of bisphenol-A graphene-oxide nano-composites

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