PSI - Issue 13

Daniel Vavřík et al. / Procedia Structural Integrity 13 (2018) 1967 – 1970 Author name / Structural Integrity Procedia 00 (2018) 000–000

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Fig. 2: COD measured in vicinity of the identified crack. Its behaviour is practically linear up to crack tip – estimated CTOD value (red line). Green line is marking probable end of the FPZ. 4. Conclusion It was shown that newly developed loading device allows to study local fracture processes with high precision even in the quasi brittle materials. CT reconstruction enables to investigate 3D shape of the newly developed crack. Calculated fracture toughness is in good agreement with expected value. Acknowledgements The research has been supported by the Operational Programme Research, Development and Education in project INAFYM (CZ.02.1.01/0.0/0.0/16_019/0000766). References Koudelka P. et al., (2019), Novel Device for 4-Point Flexural Testing of Quasi-Brittle Materials During 4D Computed Tomography. In: Gdoutos E. (eds) Proceedings of the First International Conference on Theoretical, Applied and Experimental Mechanics. ICTAEM 2018. Structural Integrity, vol 5. Springer, Cham Jandejsek, I. et al., (2017), Analysis of standard fracture toughness test based on digital image correlation data, Engineering Fracture Mechanics Volume 182, 607-620 Becker, T. H., et all., (2012), An approach to calculate the J‐integral by digital image correlation displacement field measurement. Fatigue & Fracture of Engineering Materials & Structures, 35: 971-984. doi:10.1111/j.1460-2695.2012.01685.x Anderson, T. L., (2005), Fracture Mechanics: Fundamentals and Applications (Third ed.). CRC Press. ISBN 978-0-8493-1656-2. Spagnoli, A, et all, (2015), Frattura ed Integrità Strutturale, 33 80-88; DOI: 10.3221/IGF-ESIS.33.11