Effects of gelcoat thickness on mechanical properties of woven glass/polyester laminated composite
In this study, effects of gelcoat thickness on the mechanical properties and interfacial bonding of woven glass/polyester laminated composite are investigated by using three point flexural test and tensile test. The composites had been applied at variance thickness of gelcoat layers (0.25, 0.3, 0.3...
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| Format: | Article |
| Language: | English |
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Universiti Malaysia Pahang Publishing
2018-03-01
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| Series: | Journal of Mechanical Engineering and Sciences |
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| Online Access: | https://journal.ump.edu.my/jmes/article/view/7884 |
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| author | M. Y. Yuhazri M. H. Amirhafizan G. C. H. Nilson H. Sihombing A. M. Kamarul U. Nirmal |
| author_facet | M. Y. Yuhazri M. H. Amirhafizan G. C. H. Nilson H. Sihombing A. M. Kamarul U. Nirmal |
| author_sort | M. Y. Yuhazri |
| collection | DOAJ |
| description | In this study, effects of gelcoat thickness on the mechanical properties and interfacial bonding of woven glass/polyester laminated composite are investigated by using three point flexural test and tensile test. The composites had been applied at variance
thickness of gelcoat layers (0.25, 0.3, 0.35, 0.4, 0.45, and 0.5mm) using hand lay-up method. Samples were measured in two techniques for the flexural test, i.e., coated surface facing the loads (concave) and bare surface facing the loads (convex). Since the
coated surface was concavely bent, greatest increase of flexural strength that acquired 5- fold of increase was shown by composite with 0.3 mm of gelcoat thickness for both measurements. The increasing of thickness to 0.35 mm and above deflated the rising
percentage in flexural strength. This event was happened because of the gelcoat thickness ratio was greater than the matrix/reinforcement ratio. For tensile test, composite applied with gelcoat of 0.4 mm thickness exhibited the highest increase in
strength. An increase of almost 38 % in tensile strength was recorded compared to the uncoated composite. Similarly, the increase in tensile strength reduced slightly when the
gelcoat thickness was increased above 0.4 mm. The results demonstrate that the mechanical properties of the composite improve as the gelcoat thickness increases. However, the mechanical properties show no further improvement as the thickness is further increased above the optimum thickness. |
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| institution | Directory Open Access Journal |
| issn | 2289-4659 2231-8380 |
| language | English |
| last_indexed | 2024-03-12T04:06:38Z |
| publishDate | 2018-03-01 |
| publisher | Universiti Malaysia Pahang Publishing |
| record_format | Article |
| series | Journal of Mechanical Engineering and Sciences |
| spelling | doaj.art-3d681945d54946b5ba02f00b21d6d55b2023-09-03T11:16:42ZengUniversiti Malaysia Pahang PublishingJournal of Mechanical Engineering and Sciences2289-46592231-83802018-03-011213370338610.15282/jmes.12.1.2018.7.0301Effects of gelcoat thickness on mechanical properties of woven glass/polyester laminated compositeM. Y. Yuhazri0M. H. Amirhafizan1G. C. H. Nilson2H. Sihombing3A. M. Kamarul4U. Nirmal5Faculty of Engineering Technology, Universiti Teknikal Malaysia Melaka, Hang Tuah Jaya, 76100, Durian Tunggal, Melaka, Malaysia.Faculty of Manufacturing Engineering, 3 Faculty of Technology Management and Technopreneurship Universiti Teknikal Malaysia Melaka, Hang Tuah Jaya, 76100, Durian Tunggal, Melaka, Malaysia.Faculty of Engineering Technology, Universiti Teknikal Malaysia Melaka, Hang Tuah Jaya, 76100, Durian Tunggal, Melaka, Malaysia.Faculty of Technology Management and Technopreneurship Universiti Teknikal Malaysia Melaka, Hang Tuah Jaya, 76100, Durian Tunggal, Melaka, Malaysia.Faculty of Engineering Technology, Universiti Teknikal Malaysia Melaka, Hang Tuah Jaya, 76100, Durian Tunggal, Melaka, Malaysia.Faculty of Engineering and Technology, Multimedia University, Jalan Ayer Keroh Lama, 75450, Melaka, MalaysiaIn this study, effects of gelcoat thickness on the mechanical properties and interfacial bonding of woven glass/polyester laminated composite are investigated by using three point flexural test and tensile test. The composites had been applied at variance thickness of gelcoat layers (0.25, 0.3, 0.35, 0.4, 0.45, and 0.5mm) using hand lay-up method. Samples were measured in two techniques for the flexural test, i.e., coated surface facing the loads (concave) and bare surface facing the loads (convex). Since the coated surface was concavely bent, greatest increase of flexural strength that acquired 5- fold of increase was shown by composite with 0.3 mm of gelcoat thickness for both measurements. The increasing of thickness to 0.35 mm and above deflated the rising percentage in flexural strength. This event was happened because of the gelcoat thickness ratio was greater than the matrix/reinforcement ratio. For tensile test, composite applied with gelcoat of 0.4 mm thickness exhibited the highest increase in strength. An increase of almost 38 % in tensile strength was recorded compared to the uncoated composite. Similarly, the increase in tensile strength reduced slightly when the gelcoat thickness was increased above 0.4 mm. The results demonstrate that the mechanical properties of the composite improve as the gelcoat thickness increases. However, the mechanical properties show no further improvement as the thickness is further increased above the optimum thickness. https://journal.ump.edu.my/jmes/article/view/7884gelcoatthicknessfracturelaminatedcomposite |
| spellingShingle | M. Y. Yuhazri M. H. Amirhafizan G. C. H. Nilson H. Sihombing A. M. Kamarul U. Nirmal Effects of gelcoat thickness on mechanical properties of woven glass/polyester laminated composite Journal of Mechanical Engineering and Sciences gelcoat thickness fracture laminated composite |
| title | Effects of gelcoat thickness on mechanical properties of woven glass/polyester laminated composite |
| title_full | Effects of gelcoat thickness on mechanical properties of woven glass/polyester laminated composite |
| title_fullStr | Effects of gelcoat thickness on mechanical properties of woven glass/polyester laminated composite |
| title_full_unstemmed | Effects of gelcoat thickness on mechanical properties of woven glass/polyester laminated composite |
| title_short | Effects of gelcoat thickness on mechanical properties of woven glass/polyester laminated composite |
| title_sort | effects of gelcoat thickness on mechanical properties of woven glass polyester laminated composite |
| topic | gelcoat thickness fracture laminated composite |
| url | https://journal.ump.edu.my/jmes/article/view/7884 |
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