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http://dx.doi.org/10.7469/JKSQM.2020.48.2.257

A Study on the Mechanical Characteristic Change Accordance with Surface Damaged Submarine GFRP Repairing  

Jung, Young In (Defense Agency for Technology and Quality)
Koo, Ja Gil (Daewoo Shipbuilding & Marine Engineering(DSME))
Lee, Yoon Suk (Soo seong)
Publication Information
Journal of Korean Society for Quality Management / v.48, no.2, 2020 , pp. 257-267 More about this Journal
Abstract
Purpose: The purpose of this study is to define guideline for fiber-glass-resin-putty repairing method for submarine GFRP by comparing structural strength between normal GFRP and putty repaired GFRP. Methods: GFRP specimen tensile and flexural tests are conducted in accordance with ASTM D3039/3039M-17 and ASTM D790 Procedure A. The collected data was analysed whether satisfies its structural strength criteria. Furthermore, It is analysed to find dominant reason of structural strength changes. Results: The result of the study is as follows; flexural strength of GFRP is satisfied strength criteria for all test cases, but tensile strength is not satisfied its criteria for some cases which over 2 mm depth of surface damage. Conclusion: The fiberglass-resin-putty repairing method should be applied to under 2 mm depth of damage which is not affecting to roving fiber layer destruction in GREP laminate.
Keywords
GFRP(Glass Fiber Reinforced Plastic); Surface Damage Repairing; Fiberglass-Resin-Putty; Specimen Testing; ASTM(American Standards for Testing and Materials); Tensile Strength; Flexural Strength;
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