Prediction on Remaining Life of a V-Notched Beam by Measured Modal Frequency
A prediction method for the remaining life of a V-notched beam using measured modal frequencies is proposed in this article. The main purpose is to provide a new monitoring method of crack growth for a cantilever beam. At first, the fatigue crack growth characteristic and the change law of modal fre...
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2019-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2019/7351386 |
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| _version_ | 1832555824905453568 |
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| author | Wenguang Liu Mark E. Barkey |
| author_facet | Wenguang Liu Mark E. Barkey |
| author_sort | Wenguang Liu |
| collection | DOAJ |
| description | A prediction method for the remaining life of a V-notched beam using measured modal frequencies is proposed in this article. The main purpose is to provide a new monitoring method of crack growth for a cantilever beam. At first, the fatigue crack growth characteristic and the change law of modal frequencies of a V-notched cantilever beam under cyclic loading were studied by experiments. Subsequently, the relation of modal frequencies and crack growth were analyzed. Thereafter, the decrease ratio of the first modal frequency was employed to reflect the crack damage so as to set up the relation of the modal frequency and the crack damage, and the evolution model between the crack damage and the cyclic loading numbers were set up. A prediction method for crack growth life was proposed for a cantilever beam based on the decrease ratio of the first modal frequency in the end. The remaining life of a V-notched cantilever beam can be obtained using the proposed method with a given endured loading cycles and the corresponding measured modal frequency. Results indicate that the remaining fatigue life of the V-notched cantilever beam is related to the decrease ratio of the modal frequency, and the predicted remaining life is in good agreement with the measured remaining life as the crack depth extends to a certain value. |
| format | Article |
| id | doaj-art-f7f9107335274cb99cb9643a9a5ab2b9 |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-f7f9107335274cb99cb9643a9a5ab2b92025-02-03T05:47:16ZengWileyShock and Vibration1070-96221875-92032019-01-01201910.1155/2019/73513867351386Prediction on Remaining Life of a V-Notched Beam by Measured Modal FrequencyWenguang Liu0Mark E. Barkey1School of Aeronautical Manufacturing Engineering, Nanchang Hangkong University, Nanchang, JX 330063, ChinaDepartment of Aerospace Engineering and Mechanics, The University of Alabama, Tuscaloosa, AL 35487, USAA prediction method for the remaining life of a V-notched beam using measured modal frequencies is proposed in this article. The main purpose is to provide a new monitoring method of crack growth for a cantilever beam. At first, the fatigue crack growth characteristic and the change law of modal frequencies of a V-notched cantilever beam under cyclic loading were studied by experiments. Subsequently, the relation of modal frequencies and crack growth were analyzed. Thereafter, the decrease ratio of the first modal frequency was employed to reflect the crack damage so as to set up the relation of the modal frequency and the crack damage, and the evolution model between the crack damage and the cyclic loading numbers were set up. A prediction method for crack growth life was proposed for a cantilever beam based on the decrease ratio of the first modal frequency in the end. The remaining life of a V-notched cantilever beam can be obtained using the proposed method with a given endured loading cycles and the corresponding measured modal frequency. Results indicate that the remaining fatigue life of the V-notched cantilever beam is related to the decrease ratio of the modal frequency, and the predicted remaining life is in good agreement with the measured remaining life as the crack depth extends to a certain value.http://dx.doi.org/10.1155/2019/7351386 |
| spellingShingle | Wenguang Liu Mark E. Barkey Prediction on Remaining Life of a V-Notched Beam by Measured Modal Frequency Shock and Vibration |
| title | Prediction on Remaining Life of a V-Notched Beam by Measured Modal Frequency |
| title_full | Prediction on Remaining Life of a V-Notched Beam by Measured Modal Frequency |
| title_fullStr | Prediction on Remaining Life of a V-Notched Beam by Measured Modal Frequency |
| title_full_unstemmed | Prediction on Remaining Life of a V-Notched Beam by Measured Modal Frequency |
| title_short | Prediction on Remaining Life of a V-Notched Beam by Measured Modal Frequency |
| title_sort | prediction on remaining life of a v notched beam by measured modal frequency |
| url | http://dx.doi.org/10.1155/2019/7351386 |
| work_keys_str_mv | AT wenguangliu predictiononremaininglifeofavnotchedbeambymeasuredmodalfrequency AT markebarkey predictiononremaininglifeofavnotchedbeambymeasuredmodalfrequency |