New Plastic Crack-Tip Opening Displacement Tool Based on Digital Image Correlation for Estimating the Fatigue-Crack-Growth Law on 316L Stainless Steel

This work presents a new approach for studying crack growth resulting from fatigue, which utilizes the plastic contribution of crack-tip opening displacement (CTOD ). CTOD is used to predict austenitic stainless-steel crack propagation. Unlike linear elastic fracture mechanics analysis, the method p...

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Veröffentlicht in:Materials 2023-06, Vol.16 (13), p.4589
Hauptverfasser: Ajmal, Muhammad, Lopez-Crespo, Cristina, Cruces, Alejandro S, Lopez-Crespo, Pablo
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Sprache:eng
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Zusammenfassung:This work presents a new approach for studying crack growth resulting from fatigue, which utilizes the plastic contribution of crack-tip opening displacement (CTOD ). CTOD is used to predict austenitic stainless-steel crack propagation. Unlike linear elastic fracture mechanics analysis, the method presented here is also helpful for tasks other than small-scale yielding. The approach was based on correlating full-field displacement information with post-processing digital images. This work describes a detailed post-processing protocol that can be used to calculate CTOD . The results for steel compact-tension specimens were especially promising. Of note, there was a linear relationship between the propagation rate of fatigue cracks and the CTOD range.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma16134589