노후 함정 강재의 기계적 특성 평가
Mechanical Properties Assessment of Steels Obtained from an Aged Naval Ship
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초록
Ships operated at sea for a long time are subjected to various kinds of loads, which may cause various types of damage. Such damages will eventually reduce the strength of hull structures. Therefore, it is necessary to estimate and evaluate the residual strength and remaining fatigue life of aging ships in order to secure structural safety, establish a reasonable maintenance plan, and make a judgment of life extension. For this purpose, the corrosion damage and local denting damage should be measured, fatigue damage estimation should be performed, and material properties of aged steel should be identified. For this study, in order to investigate the mechanical properties of aged steel, steel plates were obtained from a naval ship that reached the end of her life span. The specimens were manufactured from the obtained steel plates, and static and dynamic tensile tests, fatigue tests, and metallographic tests were performed. The mechanical properties obtained from the aged steel plates were compared with those of new steel plates to quantify the aging effect on the mechanical properties of marine steel materials.
Abstract
Ships operated at sea for a long time are subjected to various kinds of loads, which may cause various types of damage. Such damages will eventually reduce the strength of hull structures. Therefore, it is necessary to estimate and evaluate the residual strength and remaining fatigue life of aging ships in order to secure structural safety, establish a reasonable maintenance plan, and make a judgment of life extension. For this purpose, the corrosion damage and local denting damage should be measured, fatigue damage estimation should be performed, and material properties of aged steel should be identified. For this study, in order to investigate the mechanical properties of aged steel, steel plates were obtained from a naval ship that reached the end of her life span. The specimens were manufactured from the obtained steel plates, and static and dynamic tensile tests, fatigue tests, and metallographic tests were performed. The mechanical properties obtained from the aged steel plates were compared with those of new steel plates to quantify the aging effect on the mechanical properties of marine steel materials.
참고문헌 (13)
- American Society for Testing and Materials(ASTM), "Designation: ASTM E 8", E 8M – 08 Standard test methods for tension testing of metallic materials, 2009
- American Society for Testing and Materials(ASTM), "ASTM E3 - 95: Standard Practice for Preparation of Metallographic Specimens", ASTM 82, ~ (2016)
- Guide to fatigue design and assessment of steel products, "British Standards Institution(BSI)", ~, pp.BS 7608 (2014)
- Garbatov, Y., "Fatigue strength experiments of corroded small scale steel specimens", International Journal of Fatigue, 59, pp.137~144 (2014)
- Recommendations for fatigue design of welded joints and components, "Hobbacher, A.", ~, pp.IIW-1823-07 (2008)
- Method of tensile test for metallic materials, "Korean Agency for Technology and Standards(KS)", ~, pp.KS B 0802 (2003)
- The pieces for tension test for metallic materials), "Korean Agency for Technology and Standards (KS)", ~, pp.KS B 0801 (2007)
- Method of Repeated Tension Fatigue Testing for Fusion Welded Joints, "Korean Agency for Technology and Standards(KS)", ~, pp.KS B 0825 (2021)
- Rules and guidance for the classification of steel ships, "Korean Register(KR)", ~ (2021)
- 문재민, "대기환경하에서 장기간 사용된 부식강재의 실험적 피로거동평가", 한국강구조학회 논문집, 29(3), pp.193~204 (2017), 한국강구조학회[DOI]
- Digital twinning of ship structural fatigue: state of the art review and strategic research agenda, "Thompson, I. M.", Defence Research and Development Canada, ~, pp.DRDC-RDDC-2019-R099 (2019)
- Wang, G., "Committee V.6 Condition assessment of aged ships and offshore structures", 17th International Ship and Offshore Stuctures Congress (ISSC 2009), 2, pp.309~365 (2009)
- Wysokowski, A., "Research on changes in properties of steel from the old road bridge", Journal of Constructional Steel Research, 147, pp.360~366 (2018)