Experimental estimation of the heat energy dissipated in a volume surrounding the tip of a fatigue crack
Fatigue crack initiation and propagation involve plastic strains that require some work to be done on the material. Most of this irreversible energy is dissipated as heat and consequently the material temperature increases. The heat being an indicator of the intense plastic strains occurring at th...
Saved in:
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Gruppo Italiano Frattura
2016-01-01
|
| Series: | Fracture and Structural Integrity |
| Subjects: | |
| Online Access: | http://www.gruppofrattura.it/pdf/rivista/numero35/numero_35_art_20.pdf |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1841562973309501440 |
|---|---|
| author | G. Meneghetti M. Ricotta |
| author_facet | G. Meneghetti M. Ricotta |
| author_sort | G. Meneghetti |
| collection | DOAJ |
| description | Fatigue crack initiation and propagation involve plastic strains that require some work to be done
on the material. Most of this irreversible energy is dissipated as heat and consequently the material temperature
increases. The heat being an indicator of the intense plastic strains occurring at the tip of a propagating fatigue
crack, when combined with the Neuber’s structural volume concept, it might be used as an experimentally
measurable parameter to assess the fatigue damage accumulation rate of cracked components. On the basis of a
theoretical model published previously, in this work the heat energy dissipated in a volume surrounding the
crack tip is estimated experimentally on the basis of the radial temperature profiles measured by means of an
infrared camera. The definition of the structural volume in a fatigue sense is beyond the scope of the present
paper. The experimental crack propagation tests were carried out on hot-rolled, 6-mm-thick AISI 304L stainless
steel specimens subject to completely reversed axial fatigue loading. |
| format | Article |
| id | doaj-art-168cd8fe88f94a61acd79a2336eff64f |
| institution | Kabale University |
| issn | 1971-8993 1971-8993 |
| language | English |
| publishDate | 2016-01-01 |
| publisher | Gruppo Italiano Frattura |
| record_format | Article |
| series | Fracture and Structural Integrity |
| spelling | doaj-art-168cd8fe88f94a61acd79a2336eff64f2025-01-03T00:26:52ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89931971-89932016-01-01103517218110.3221/IGF-ESIS.35.20Experimental estimation of the heat energy dissipated in a volume surrounding the tip of a fatigue crackG. Meneghetti0M. Ricotta1University of Padova,ItalyUniversity of Padova,ItalyFatigue crack initiation and propagation involve plastic strains that require some work to be done on the material. Most of this irreversible energy is dissipated as heat and consequently the material temperature increases. The heat being an indicator of the intense plastic strains occurring at the tip of a propagating fatigue crack, when combined with the Neuber’s structural volume concept, it might be used as an experimentally measurable parameter to assess the fatigue damage accumulation rate of cracked components. On the basis of a theoretical model published previously, in this work the heat energy dissipated in a volume surrounding the crack tip is estimated experimentally on the basis of the radial temperature profiles measured by means of an infrared camera. The definition of the structural volume in a fatigue sense is beyond the scope of the present paper. The experimental crack propagation tests were carried out on hot-rolled, 6-mm-thick AISI 304L stainless steel specimens subject to completely reversed axial fatigue loading.http://www.gruppofrattura.it/pdf/rivista/numero35/numero_35_art_20.pdfCrack tipCrack propagationHeat energyAISI 304LAveraging approaches |
| spellingShingle | G. Meneghetti M. Ricotta Experimental estimation of the heat energy dissipated in a volume surrounding the tip of a fatigue crack Fracture and Structural Integrity Crack tip Crack propagation Heat energy AISI 304L Averaging approaches |
| title | Experimental estimation of the heat energy dissipated in a volume surrounding the tip of a fatigue crack |
| title_full | Experimental estimation of the heat energy dissipated in a volume surrounding the tip of a fatigue crack |
| title_fullStr | Experimental estimation of the heat energy dissipated in a volume surrounding the tip of a fatigue crack |
| title_full_unstemmed | Experimental estimation of the heat energy dissipated in a volume surrounding the tip of a fatigue crack |
| title_short | Experimental estimation of the heat energy dissipated in a volume surrounding the tip of a fatigue crack |
| title_sort | experimental estimation of the heat energy dissipated in a volume surrounding the tip of a fatigue crack |
| topic | Crack tip Crack propagation Heat energy AISI 304L Averaging approaches |
| url | http://www.gruppofrattura.it/pdf/rivista/numero35/numero_35_art_20.pdf |
| work_keys_str_mv | AT gmeneghetti experimentalestimationoftheheatenergydissipatedinavolumesurroundingthetipofafatiguecrack AT mricotta experimentalestimationoftheheatenergydissipatedinavolumesurroundingthetipofafatiguecrack |