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2011 Fiscal Year Final Research Report

Development of a monitoring method for fatigue damage using piezoelectric element

Research Project

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Project/Area Number 21560840
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Naval and maritime engineering
Research InstitutionNational Maritime Research Institute

Principal Investigator

NIWA Toshio  独立行政法人海上技術安全研究所, 構造系, 上席研究員 (10208267)

Co-Investigator(Kenkyū-buntansha) SHIMADA Michio  (独)海上技術安全研究所, 構造系, 上席研究員 (30396246)
TANAKA Yashihisa  (独)海上技術安全研究所, 構造系, 主任研究員 (70399517)
Project Period (FY) 2009 – 2011
Keywords船舶検査 / モニタリング / 超音波 / 疲労き裂 / 応力 / 隅肉溶接
Research Abstract

This paper describes a development of ultrasonic monitoring technique applied for through thickness fatigue cracks neighboring fillet weld parts. A combination of transmitted wave measurement and reflected wave measurement was found to be useful in quantitative detection of the fatigue crack. In case of 100mm separation between transmitting probe and receiving probe, our method obtains 40mm as an effective area for the quantitative detection. In other hand, fatigue crack bring about an underestimation of the cracks under lower stress amplitude. Therefore, it is important for a timing optimization of data acquisition by a synchronization with ship movement.

  • Research Products

    (1 results)

All Other

All Presentation (1 results)

  • [Presentation] 船体溶接部近傍の貫通疲労き裂をモニタリングするための超音波送受信システムの構築

    • Author(s)
      島田道男,丹羽敏男,田中義久
    • Organizer
      日本機械学会関東支部18期講演会論文集

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Published: 2013-07-31  

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