Investigation and optimization of thermal shock effects on the properties and microstructure of Nanoclay-Glass Fiber Reinforced Epoxy Composites

Manjunath Shettar, U. Achutha Kini, Sathyashankara Sharma, Pavan Hiremath, M. C. Gowrishankar

Research output: Contribution to journalArticle

Abstract

In the present work, 'Nanoclay-Glass Fiber Reinforced Epoxy Composites (NGFRECs)' are produced by hand lay-up process with a varying weight percentage of glass fiber and nanoclay. NGFRECs undergo two variety of thermal shock conditions. As prepared composites and thermal shock conditioned specimens are tested for tensile and flexural strength according to ASTM standards. To optimize the responses variables, 'Design of Experiment (DOE)' based on the full factorial design (33 = L27) is used. MINITAB 18 software is used for design and analyses. Results revealed that increasing glass fiber weight percentage and nanoclay has enhanced the flexural and tensile strength, whereas thermal shock conditions declined aforesaid strengths. The failure mode of the NGFREC as disclosed from SEM images include any of the following combinations, fiber pullout, rupture of the matrix, fiber-matrix de-bonding, delamination, matrix crazing, initiation and propagation of micro-cracks.

Original languageEnglish
Article number105360
JournalMaterials Research Express
Volume6
Issue number10
DOIs
Publication statusPublished - 11-09-2019

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Thermal shock
Glass fibers
Microstructure
Composite materials
Bending strength
Tensile strength
Crazing
Fibers
Delamination
Design of experiments
Failure modes
Crack propagation
fiberglass
Cracks
Scanning electron microscopy

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Polymers and Plastics
  • Metals and Alloys

Cite this

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abstract = "In the present work, 'Nanoclay-Glass Fiber Reinforced Epoxy Composites (NGFRECs)' are produced by hand lay-up process with a varying weight percentage of glass fiber and nanoclay. NGFRECs undergo two variety of thermal shock conditions. As prepared composites and thermal shock conditioned specimens are tested for tensile and flexural strength according to ASTM standards. To optimize the responses variables, 'Design of Experiment (DOE)' based on the full factorial design (33 = L27) is used. MINITAB 18 software is used for design and analyses. Results revealed that increasing glass fiber weight percentage and nanoclay has enhanced the flexural and tensile strength, whereas thermal shock conditions declined aforesaid strengths. The failure mode of the NGFREC as disclosed from SEM images include any of the following combinations, fiber pullout, rupture of the matrix, fiber-matrix de-bonding, delamination, matrix crazing, initiation and propagation of micro-cracks.",
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AU - Shettar, Manjunath

AU - Achutha Kini, U.

AU - Sharma, Sathyashankara

AU - Hiremath, Pavan

AU - Gowrishankar, M. C.

PY - 2019/9/11

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