Mechanical testing and microstructure characterization of glass fiber reinforced isophthalic polyester composites

Ritesh Bhat, Nanjangud Mohan, Sathyashankara Sharma, Ashu Pratap, Agastya Prasad Keni, Dev Sodani

Research output: Contribution to journalArticle

Abstract

The present work investigates the effect of material geometry in terms of material thickness on the mechanical properties of glass fiber reinforced isophthalic polyesters. The tensile strength, flexural strength, and Barcol hardness quantify the mechanical properties in this article. The experimental tests as per the ASTM standards show that the tensile strength and hardness increase with the increase in the thickness of laminates. The flexural strength is determined to decrease with the increasing thickness of laminates. The statistical analysis through ANOVA test shows that material thickness is a significant factor affecting the mechanical properties with 83.88, 70.37, 97.63 and 62.19% contribution toward the variance in the tensile strength, Young's modulus, flexural strength, and hardness respectively within the selected range of values for glass fiber reinforced isophthalic polyesters. The tensile failure mode analysis indicates that the increase in the thickness of laminates increases delamination failure. It is also found that the anisotropic behavior of the composites leads to an angular failure of the specimen in the tensile test. The random orientation of fibers leading to anisotropic behavior and increasing voids/decreasing interfacial bonding with the increasing laminate thickness is visualized in the microstructural studies through SEM images.

Original languageEnglish
Pages (from-to)3653-3661
Number of pages9
JournalJournal of Materials Research and Technology
Volume8
Issue number4
DOIs
Publication statusPublished - 01-07-2019

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Polyesters
Mechanical testing
Glass fibers
Laminates
Bending strength
Microstructure
Tensile strength
Hardness
Composite materials
Mechanical properties
Analysis of variance (ANOVA)
Delamination
Failure modes
Statistical methods
Elastic moduli
Scanning electron microscopy
Geometry
fiberglass
Fibers

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Biomaterials
  • Surfaces, Coatings and Films
  • Metals and Alloys

Cite this

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abstract = "The present work investigates the effect of material geometry in terms of material thickness on the mechanical properties of glass fiber reinforced isophthalic polyesters. The tensile strength, flexural strength, and Barcol hardness quantify the mechanical properties in this article. The experimental tests as per the ASTM standards show that the tensile strength and hardness increase with the increase in the thickness of laminates. The flexural strength is determined to decrease with the increasing thickness of laminates. The statistical analysis through ANOVA test shows that material thickness is a significant factor affecting the mechanical properties with 83.88, 70.37, 97.63 and 62.19{\%} contribution toward the variance in the tensile strength, Young's modulus, flexural strength, and hardness respectively within the selected range of values for glass fiber reinforced isophthalic polyesters. The tensile failure mode analysis indicates that the increase in the thickness of laminates increases delamination failure. It is also found that the anisotropic behavior of the composites leads to an angular failure of the specimen in the tensile test. The random orientation of fibers leading to anisotropic behavior and increasing voids/decreasing interfacial bonding with the increasing laminate thickness is visualized in the microstructural studies through SEM images.",
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Mechanical testing and microstructure characterization of glass fiber reinforced isophthalic polyester composites. / Bhat, Ritesh; Mohan, Nanjangud; Sharma, Sathyashankara; Pratap, Ashu; Keni, Agastya Prasad; Sodani, Dev.

In: Journal of Materials Research and Technology, Vol. 8, No. 4, 01.07.2019, p. 3653-3661.

Research output: Contribution to journalArticle

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