Journal of the Society of Naval Architects of Korea (대한조선학회논문집)

The Society of Naval Architects of Korea (대한조선학회)
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Mechanical Properties Assessment of Steels Obtained from an Aged Naval Ship

노후 함정 강재의 기계적 특성 평가

  • Received : 2022.11.11
  • Accepted : 2023.01.30
  • Published : 2023.04.20
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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.

Keywords

Acknowledgement

동인장시험을 수행해 주신 인하대학교 조선해양공학과 SOSEL 실험실, 피로시험을 수행해 주신 부경대학교 공동실험실습관 구조재료실험실, 그리고 금속조직시험을 수행해 주신 울산대학교 공동기기센터 재료분석부 관계자 여러분께 감사를 드립니다.

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