A study on rapid evaluation of fatigue limit based on temperature variation (Source of the second harmonic of temperature variation)
The technique of rapid evaluation of fatigue limit using infrared thermography has been paid attention during the past 30 years. This technique is beneficial because it also makes possible to detect the location of fatigue damage in real structures. In this technique, the second harmonic of temperat...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | Japanese |
| Published: |
The Japan Society of Mechanical Engineers
2018-02-01
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| Series: | Nihon Kikai Gakkai ronbunshu |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/transjsme/84/858/84_17-00462/_pdf/-char/en |
| _version_ | 1797989131964383232 |
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| author | Ryogo KAWAI Yu KUROKAWA Yousuke IRIE Hirotsugu INOUE |
| author_facet | Ryogo KAWAI Yu KUROKAWA Yousuke IRIE Hirotsugu INOUE |
| author_sort | Ryogo KAWAI |
| collection | DOAJ |
| description | The technique of rapid evaluation of fatigue limit using infrared thermography has been paid attention during the past 30 years. This technique is beneficial because it also makes possible to detect the location of fatigue damage in real structures. In this technique, the second harmonic of temperature variation during cyclic loading is often used as a measure of the temperature evolution to evaluate the fatigue limit. The source of the second harmonic has been already investigated quantitatively for the load amplitude above the fatigue limit but has not been investigated very well for the load amplitude below the fatigue limit. In this research, five factors (second harmonic caused by energy dissipation, applied load signal, photoelectric current of infrared sensor, quantization error and specimen movement) were examined quantitatively to examine the source of the second harmonic below the fatigue limit. Experiments were conducted for double edge notched specimens of type 304 stainless steel. As a result, it was found that the second harmonic of temperature variation below the fatigue limit is mainly caused by loading equipment. In conclusion, it is suggested that the fatigue limit should be evaluated by fitting curves considering the second harmonic proportional to the square of the load amplitude. |
| first_indexed | 2024-04-11T08:15:23Z |
| format | Article |
| id | doaj.art-f32bddbfd2534617b28fa93821afb67a |
| institution | Directory Open Access Journal |
| issn | 2187-9761 |
| language | Japanese |
| last_indexed | 2024-04-11T08:15:23Z |
| publishDate | 2018-02-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Nihon Kikai Gakkai ronbunshu |
| spelling | doaj.art-f32bddbfd2534617b28fa93821afb67a2022-12-22T04:35:11ZjpnThe Japan Society of Mechanical EngineersNihon Kikai Gakkai ronbunshu2187-97612018-02-018485817-0046217-0046210.1299/transjsme.17-00462transjsmeA study on rapid evaluation of fatigue limit based on temperature variation (Source of the second harmonic of temperature variation)Ryogo KAWAI0Yu KUROKAWA1Yousuke IRIE2Hirotsugu INOUE3Tokyo Institute of TechnologyTokyo Institute of TechnologyPanasonic Corporation, Innovation Centor, Connected Solutions CompanyTokyo Institute of TechnologyThe technique of rapid evaluation of fatigue limit using infrared thermography has been paid attention during the past 30 years. This technique is beneficial because it also makes possible to detect the location of fatigue damage in real structures. In this technique, the second harmonic of temperature variation during cyclic loading is often used as a measure of the temperature evolution to evaluate the fatigue limit. The source of the second harmonic has been already investigated quantitatively for the load amplitude above the fatigue limit but has not been investigated very well for the load amplitude below the fatigue limit. In this research, five factors (second harmonic caused by energy dissipation, applied load signal, photoelectric current of infrared sensor, quantization error and specimen movement) were examined quantitatively to examine the source of the second harmonic below the fatigue limit. Experiments were conducted for double edge notched specimens of type 304 stainless steel. As a result, it was found that the second harmonic of temperature variation below the fatigue limit is mainly caused by loading equipment. In conclusion, it is suggested that the fatigue limit should be evaluated by fitting curves considering the second harmonic proportional to the square of the load amplitude.https://www.jstage.jst.go.jp/article/transjsme/84/858/84_17-00462/_pdf/-char/enfatigue limitinfrared thermographydissipated energynotchstainless steel |
| spellingShingle | Ryogo KAWAI Yu KUROKAWA Yousuke IRIE Hirotsugu INOUE A study on rapid evaluation of fatigue limit based on temperature variation (Source of the second harmonic of temperature variation) Nihon Kikai Gakkai ronbunshu fatigue limit infrared thermography dissipated energy notch stainless steel |
| title | A study on rapid evaluation of fatigue limit based on temperature variation (Source of the second harmonic of temperature variation) |
| title_full | A study on rapid evaluation of fatigue limit based on temperature variation (Source of the second harmonic of temperature variation) |
| title_fullStr | A study on rapid evaluation of fatigue limit based on temperature variation (Source of the second harmonic of temperature variation) |
| title_full_unstemmed | A study on rapid evaluation of fatigue limit based on temperature variation (Source of the second harmonic of temperature variation) |
| title_short | A study on rapid evaluation of fatigue limit based on temperature variation (Source of the second harmonic of temperature variation) |
| title_sort | study on rapid evaluation of fatigue limit based on temperature variation source of the second harmonic of temperature variation |
| topic | fatigue limit infrared thermography dissipated energy notch stainless steel |
| url | https://www.jstage.jst.go.jp/article/transjsme/84/858/84_17-00462/_pdf/-char/en |
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