24 August 2000 Detection of damage location in ductile members
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As is well known, Lueders' lines are visible to the naked eye, and appear in carbon steel when yield point elongation occurs. Lueders' lines show that yield stress is bringing about failure in part of the structure where Lueders' lines appears. Therefore Lueders' lines may function as a visible smart sensor for failure locaation. By the use of Lueders' lines it is possible to discern with the naked eye the generation of a failure location on the member of a carbon steel strip. Observation by the naked eye was made of the failure zone corresponding to cyclic loading at a hole inserted in a structural carbon steel specimen. Investigation was undertaken of the utility of Lueders' lines for discerning clamping force at the moment of tightening a bolt. At the moment of tightening it was ascertained that no uniform axial stress was acting on the bearing surface.
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Kensuke Ichinose, Kiyoshi Taniuchi, Masashi Kandatsu, Junho Song, Katsumi Fukuda, "Detection of damage location in ductile members", Proc. SPIE 4073, Fifth European Conference on Smart Structures and Materials, (24 August 2000); doi: 10.1117/12.396402; https://doi.org/10.1117/12.396402


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