Mechanical testing and microstructure characterization of glass fiber reinforced isophthalic polyester composites
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 experimenta...
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doaj-c5b9dec151fa43daa08355900afe0ac32020-11-25T03:20:55ZengElsevierJournal of Materials Research and Technology2238-78542019-07-018436533661Mechanical testing and microstructure characterization of glass fiber reinforced isophthalic polyester compositesRitesh Bhat0Nanjangud Mohan1Sathyashankara Sharma2Ashu Pratap3Agastya Prasad Keni4Dev Sodani5Mechanical Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal 576104, Karnataka, IndiaCorresponding author.; Mechanical Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal 576104, Karnataka, IndiaMechanical Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal 576104, Karnataka, IndiaMechanical Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal 576104, Karnataka, IndiaMechanical Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal 576104, Karnataka, IndiaMechanical Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal 576104, Karnataka, IndiaThe 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. Keywords: Glass fiber, Isophthalic polyesters, Mechanical testing, Microstructure characterization, Tensile failure modes, ANOVAhttp://www.sciencedirect.com/science/article/pii/S223878541930674X |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Ritesh Bhat Nanjangud Mohan Sathyashankara Sharma Ashu Pratap Agastya Prasad Keni Dev Sodani |
spellingShingle |
Ritesh Bhat Nanjangud Mohan Sathyashankara Sharma Ashu Pratap Agastya Prasad Keni Dev Sodani Mechanical testing and microstructure characterization of glass fiber reinforced isophthalic polyester composites Journal of Materials Research and Technology |
author_facet |
Ritesh Bhat Nanjangud Mohan Sathyashankara Sharma Ashu Pratap Agastya Prasad Keni Dev Sodani |
author_sort |
Ritesh Bhat |
title |
Mechanical testing and microstructure characterization of glass fiber reinforced isophthalic polyester composites |
title_short |
Mechanical testing and microstructure characterization of glass fiber reinforced isophthalic polyester composites |
title_full |
Mechanical testing and microstructure characterization of glass fiber reinforced isophthalic polyester composites |
title_fullStr |
Mechanical testing and microstructure characterization of glass fiber reinforced isophthalic polyester composites |
title_full_unstemmed |
Mechanical testing and microstructure characterization of glass fiber reinforced isophthalic polyester composites |
title_sort |
mechanical testing and microstructure characterization of glass fiber reinforced isophthalic polyester composites |
publisher |
Elsevier |
series |
Journal of Materials Research and Technology |
issn |
2238-7854 |
publishDate |
2019-07-01 |
description |
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. Keywords: Glass fiber, Isophthalic polyesters, Mechanical testing, Microstructure characterization, Tensile failure modes, ANOVA |
url |
http://www.sciencedirect.com/science/article/pii/S223878541930674X |
work_keys_str_mv |
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