Fatigue and fracture assessment of cracks in steel elements using acoustic emission

Navid Nemati, Brian Metrovich, Antonio Nanni

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

Single edge notches provide a very well defined load and fatigue crack size and shape environment for estimation of the stress intensity factor K, which is not found in welded elements. ASTM SE(T) specimens do not appear to provide ideal boundary conditions for proper recording of acoustic wave propagation and crack growth behavior observed in steel bridges, but do provide standard fatigue crack growth rate data. A modified versions of the SE(T) specimen has been examined to provide small scale specimens with improved acoustic emission(AE) characteristics while still maintaining accuracy of fatigue crack growth rate (da/dN) versus stress intensity factor (ΔK). The specimens intend to represent a steel beam flange subjected to pure tension, with a surface crack growing transverse to a uniform stress field. Fatigue test is conducted at low R ratio. Analytical and numerical studies of stress intensity factor are developed for single edge notch test specimens consistent with the experimental program. ABAQUS finite element software is utilized for stress analysis of crack tips. Analytical, experimental and numerical analysis were compared to assess the abilities of AE to capture a growing crack.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Volume7984
DOIs
StatePublished - May 24 2011
EventHealth Monitoring of Structural and Biological Systems 2011 - San Diego, CA, United States
Duration: Mar 7 2011Mar 10 2011

Other

OtherHealth Monitoring of Structural and Biological Systems 2011
CountryUnited States
CitySan Diego, CA
Period3/7/113/10/11

Fingerprint

Acoustic Emission
Steel
acoustic emission
Stress Intensity Factor
Acoustic emissions
Stress intensity factors
Fatigue
Crack Growth Rate
Crack
Fatigue Crack Growth
cracks
Notch
steels
Fatigue of materials
stress intensity factors
Fatigue crack propagation
Cracks
Consistent Test
Acoustic wave propagation
Steel bridges

Keywords

  • Acoustic emission
  • Crack growth
  • Fatigue
  • Steel
  • Stress intensity factor
  • Structural health monitoring

ASJC Scopus subject areas

  • Applied Mathematics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Nemati, N., Metrovich, B., & Nanni, A. (2011). Fatigue and fracture assessment of cracks in steel elements using acoustic emission. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 7984). [79842L] https://doi.org/10.1117/12.880782

Fatigue and fracture assessment of cracks in steel elements using acoustic emission. / Nemati, Navid; Metrovich, Brian; Nanni, Antonio.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 7984 2011. 79842L.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Nemati, N, Metrovich, B & Nanni, A 2011, Fatigue and fracture assessment of cracks in steel elements using acoustic emission. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 7984, 79842L, Health Monitoring of Structural and Biological Systems 2011, San Diego, CA, United States, 3/7/11. https://doi.org/10.1117/12.880782
Nemati N, Metrovich B, Nanni A. Fatigue and fracture assessment of cracks in steel elements using acoustic emission. In Proceedings of SPIE - The International Society for Optical Engineering. Vol. 7984. 2011. 79842L https://doi.org/10.1117/12.880782
Nemati, Navid ; Metrovich, Brian ; Nanni, Antonio. / Fatigue and fracture assessment of cracks in steel elements using acoustic emission. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 7984 2011.
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