Error Analysis of Non-Destructive Ultrasonic Testing of Glass Fiber-Reinforced Polymer Hull Plates
Glass fiber-reinforced polymer (GFRP) ship structures are generally fabricated by hand lay-up; thus, the environmental factors and worker proficiency influence the fabrication process and presence of error in the non-destructive evaluation results. In this study, the ultrasonic testing of GFRP hull...
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doaj-4192f683d469466cb7ec45364e195bf82021-09-26T00:29:08ZengMDPI AGJournal of Composites Science2504-477X2021-09-01523823810.3390/jcs5090238Error Analysis of Non-Destructive Ultrasonic Testing of Glass Fiber-Reinforced Polymer Hull PlatesZhiqiang Han0Jaewon Jang1Sang-Gyu Lee2Dongkun Lee3Daekyun Oh4Department of Ocean System Engineering, Mokpo National Maritime University, Mokpo 58628, KoreaDepartment of Ocean System Engineering, Mokpo National Maritime University, Mokpo 58628, KoreaDepartment of Ocean System Engineering, Mokpo National Maritime University, Mokpo 58628, KoreaDepartment of Naval Architecture and Ocean Engineering, Mokpo National Maritime University, Mokpo 58628, KoreaDepartment of Naval Architecture and Ocean Engineering, Mokpo National Maritime University, Mokpo 58628, KoreaGlass fiber-reinforced polymer (GFRP) ship structures are generally fabricated by hand lay-up; thus, the environmental factors and worker proficiency influence the fabrication process and presence of error in the non-destructive evaluation results. In this study, the ultrasonic testing of GFRP hull plate prototypes was conducted to investigate the statistical significance of the influences of the design parameters, e.g., the glass fiber weight fraction (Gc) and thickness variations, on the measurement error. The GFRP hull plate prototypes were fitted with E-glass fiber chopped strand mats (40 wt % content) with different thicknesses (7.72 mm, 14.63 mm, and 18.24 mm). The errors in the thickness measurements were investigated by conducting pulse-echo ultrasonic A-scan. The thickness variation resulted in increased error. Furthermore, hull plate burn-off tests were conducted to investigate the fabrication qualities. Defects such as voids did not have a significant influence on the results. The statistical analysis of the measurement errors confirmed that the thickness variations resulted in a strong ultrasonic interference between the hull plates, although the hull plates had similar specific gravity values. Therefore, the ultrasonic interference of the layer group interface should be considered to decrease the GFRP hull NDE errors with respect to an increase in the thickness and Gc.https://www.mdpi.com/2504-477X/5/9/238non-destructive testingsmall crafthull plateglass fiber-reinforced polymerultrasoundthickness measurement errors |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Zhiqiang Han Jaewon Jang Sang-Gyu Lee Dongkun Lee Daekyun Oh |
spellingShingle |
Zhiqiang Han Jaewon Jang Sang-Gyu Lee Dongkun Lee Daekyun Oh Error Analysis of Non-Destructive Ultrasonic Testing of Glass Fiber-Reinforced Polymer Hull Plates Journal of Composites Science non-destructive testing small craft hull plate glass fiber-reinforced polymer ultrasound thickness measurement errors |
author_facet |
Zhiqiang Han Jaewon Jang Sang-Gyu Lee Dongkun Lee Daekyun Oh |
author_sort |
Zhiqiang Han |
title |
Error Analysis of Non-Destructive Ultrasonic Testing of Glass Fiber-Reinforced Polymer Hull Plates |
title_short |
Error Analysis of Non-Destructive Ultrasonic Testing of Glass Fiber-Reinforced Polymer Hull Plates |
title_full |
Error Analysis of Non-Destructive Ultrasonic Testing of Glass Fiber-Reinforced Polymer Hull Plates |
title_fullStr |
Error Analysis of Non-Destructive Ultrasonic Testing of Glass Fiber-Reinforced Polymer Hull Plates |
title_full_unstemmed |
Error Analysis of Non-Destructive Ultrasonic Testing of Glass Fiber-Reinforced Polymer Hull Plates |
title_sort |
error analysis of non-destructive ultrasonic testing of glass fiber-reinforced polymer hull plates |
publisher |
MDPI AG |
series |
Journal of Composites Science |
issn |
2504-477X |
publishDate |
2021-09-01 |
description |
Glass fiber-reinforced polymer (GFRP) ship structures are generally fabricated by hand lay-up; thus, the environmental factors and worker proficiency influence the fabrication process and presence of error in the non-destructive evaluation results. In this study, the ultrasonic testing of GFRP hull plate prototypes was conducted to investigate the statistical significance of the influences of the design parameters, e.g., the glass fiber weight fraction (Gc) and thickness variations, on the measurement error. The GFRP hull plate prototypes were fitted with E-glass fiber chopped strand mats (40 wt % content) with different thicknesses (7.72 mm, 14.63 mm, and 18.24 mm). The errors in the thickness measurements were investigated by conducting pulse-echo ultrasonic A-scan. The thickness variation resulted in increased error. Furthermore, hull plate burn-off tests were conducted to investigate the fabrication qualities. Defects such as voids did not have a significant influence on the results. The statistical analysis of the measurement errors confirmed that the thickness variations resulted in a strong ultrasonic interference between the hull plates, although the hull plates had similar specific gravity values. Therefore, the ultrasonic interference of the layer group interface should be considered to decrease the GFRP hull NDE errors with respect to an increase in the thickness and Gc. |
topic |
non-destructive testing small craft hull plate glass fiber-reinforced polymer ultrasound thickness measurement errors |
url |
https://www.mdpi.com/2504-477X/5/9/238 |
work_keys_str_mv |
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