Application of thermoelastic stress analysis for the experimental evaluation of the effective stress intensity factor
In recent years, the advent of staring array detectors has made Thermoelastic Stress Analysis (TSA) a technique with considerable potential for fatigue and fracture mechanics applications. The technique is non-contacting and provides full field stress maps from the surface of cyclically loaded compo...
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| Format: | Article |
| Language: | English |
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Gruppo Italiano Frattura
2013-07-01
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| Series: | Fracture and Structural Integrity |
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| Online Access: | http://www.gruppofrattura.it/pdf/rivista/numero25/numero_25_art_16.pdf |
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| _version_ | 1841562668181225472 |
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| author | Francisco A. Díaz Eann A. Patterson John R. Yates |
| author_facet | Francisco A. Díaz Eann A. Patterson John R. Yates |
| author_sort | Francisco A. Díaz |
| collection | DOAJ |
| description | In recent years, the advent of staring array detectors has made Thermoelastic Stress Analysis (TSA) a technique with considerable potential for fatigue and fracture mechanics applications. The technique is non-contacting and provides full field stress maps from the surface of cyclically loaded components. In addition, the technique appears to have a great potential in the evaluation of the effective stress intensity factor range during fatigue since fracture mechanics parameters are derived directly from the temperature changes in the vicinity of the crack tip rather than from remote data. In the current work TSA is presented as a novel methodology for measuring the effective stress intensity factor from the analysis of thermoelastic images. ΔK values inferred using TSA have been employed to estimate an equivalent opening/closing load at different R-ratios in a cracked aluminium 2024 CT specimen. Results have been compared with those obtained using the strain-offset technique showing a good level of agreement. |
| format | Article |
| id | doaj-art-f6fcbaa636434b3585535869e07dfca9 |
| institution | Kabale University |
| issn | 1971-8993 |
| language | English |
| publishDate | 2013-07-01 |
| publisher | Gruppo Italiano Frattura |
| record_format | Article |
| series | Fracture and Structural Integrity |
| spelling | doaj-art-f6fcbaa636434b3585535869e07dfca92025-01-03T00:45:54ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89932013-07-0172510911610.3221/IGF-ESIS.25.16Application of thermoelastic stress analysis for the experimental evaluation of the effective stress intensity factorFrancisco A. DíazEann A. PattersonJohn R. YatesIn recent years, the advent of staring array detectors has made Thermoelastic Stress Analysis (TSA) a technique with considerable potential for fatigue and fracture mechanics applications. The technique is non-contacting and provides full field stress maps from the surface of cyclically loaded components. In addition, the technique appears to have a great potential in the evaluation of the effective stress intensity factor range during fatigue since fracture mechanics parameters are derived directly from the temperature changes in the vicinity of the crack tip rather than from remote data. In the current work TSA is presented as a novel methodology for measuring the effective stress intensity factor from the analysis of thermoelastic images. ΔK values inferred using TSA have been employed to estimate an equivalent opening/closing load at different R-ratios in a cracked aluminium 2024 CT specimen. Results have been compared with those obtained using the strain-offset technique showing a good level of agreement.http://www.gruppofrattura.it/pdf/rivista/numero25/numero_25_art_16.pdfThermoelastic Stress Analysis (TSA)FatigueEffective Stress Intensity Factor |
| spellingShingle | Francisco A. Díaz Eann A. Patterson John R. Yates Application of thermoelastic stress analysis for the experimental evaluation of the effective stress intensity factor Fracture and Structural Integrity Thermoelastic Stress Analysis (TSA) Fatigue Effective Stress Intensity Factor |
| title | Application of thermoelastic stress analysis for the experimental evaluation of the effective stress intensity factor |
| title_full | Application of thermoelastic stress analysis for the experimental evaluation of the effective stress intensity factor |
| title_fullStr | Application of thermoelastic stress analysis for the experimental evaluation of the effective stress intensity factor |
| title_full_unstemmed | Application of thermoelastic stress analysis for the experimental evaluation of the effective stress intensity factor |
| title_short | Application of thermoelastic stress analysis for the experimental evaluation of the effective stress intensity factor |
| title_sort | application of thermoelastic stress analysis for the experimental evaluation of the effective stress intensity factor |
| topic | Thermoelastic Stress Analysis (TSA) Fatigue Effective Stress Intensity Factor |
| url | http://www.gruppofrattura.it/pdf/rivista/numero25/numero_25_art_16.pdf |
| work_keys_str_mv | AT franciscoadiaz applicationofthermoelasticstressanalysisfortheexperimentalevaluationoftheeffectivestressintensityfactor AT eannapatterson applicationofthermoelasticstressanalysisfortheexperimentalevaluationoftheeffectivestressintensityfactor AT johnryates applicationofthermoelasticstressanalysisfortheexperimentalevaluationoftheeffectivestressintensityfactor |