A fatigue damage sensor (FDS) that enables an evaluation of the remaining life of welded steel structures has been developed. The FDS is a type of sensing gauge, which is stuck on the steel structure and indicates the magnitude of the stress fatigue damage. The FDS is constructed with two metal foils. A fatigue crack initiates on the FDS when it experiences a certain magnitude duration of varying amplitude strain. The length of the fatigue crack growth is converted into structural fatigue damage based on the crack growth properties of thin metal. The size of the FDS is small enough to be able to pick up the structurally concentrated stress in the vicinity of welding beads. A computational method was used to design the configurations. Its capability was verified through a cyclic loading fatigue test with a large steel beam simulating a part of a steel bridge.
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March 2010
Research Article|
March 01 2010
Remaining life estimation by fatigue damage sensor
K. Nihei;
K. Nihei
1
Chief Researcher of Section 2 of Strength Research Department, Technical Institute of Kawasaki Heavy Industries Ltd
Hyogo, Japan
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O. Muragishi;
O. Muragishi
2
Manager of Section 2 of Material Research Department, Technical Institute of Kawasaki Heavy Industries Ltd
Hyogo, Japan
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T. Kobayashi;
T. Kobayashi
3
Researcher of Section 2 of Strength Research Department, Technical Institute of Kawasaki Heavy Industries Ltd
Hyogo, Japan
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K. Ohgaki;
K. Ohgaki
4
Corporate Business Development Division, Kawasaki Heavy Industries Ltd
Tokyo, Japan
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A. Umeda
A. Umeda
5
Industrial Facilities and Tunneling Equipment Division, Kawasaki Heavy Industries Ltd
Hyogo, Japan
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Publisher: Emerald Publishing
Received:
July 24 2007
Accepted:
November 27 2009
Online ISSN: 1751-7664
Print ISSN: 1478-4637
© 2010 The authors and the Institution of Civil Engineers
2010
Proceedings of the Institution of Civil Engineers - Bridge Engineering (2010) 163 (1): 3–11.
Article history
Received:
July 24 2007
Accepted:
November 27 2009
Citation
Nihei K, Muragishi O, Kobayashi T, Ohgaki K, Umeda A (2010), "Remaining life estimation by fatigue damage sensor". Proceedings of the Institution of Civil Engineers - Bridge Engineering, Vol. 163 No. 1 pp. 3–11, doi: https://doi.org/10.1680/bren.2010.163.1.003
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