Pilot evaluation of a fracture process zone in a modified compact tension specimen by X-ray tomography
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http://orcid.org/0000-0002-9551-2185
Stanislav Seitl
Brno University of Technology, Faculty of Civil Engineering, Veveří 331/95, 602 00 Brno, Czech Republic
http://orcid.org/0000-0002-4953-4324
Hana Simonova
Brno University of Technology, Faculty of Civil Engineering, Veveří 331/95, 602 00 Brno, Czech Republic
http://orcid.org/0000-0003-1537-6388
Zbynek Kersner
Brno University of Technology, Faculty of Civil Engineering, Veveří 331/95, 602 00 Brno, Czech Republic
http://orcid.org/0000-0003-4724-6166
Ivana Kumpova
Institute of Theoretical and Applied Mechanics AS CR, v. v. i., Prosecká 809/76, 190 00 Praha 9, Czech Republic
http://orcid.org/0000-0001-8556-4996
Daniel Vavrik
Institute of Theoretical and Applied Mechanics AS CR, v. v. i., Prosecká 809/76, 190 00 Praha 9, Czech Republic
http://orcid.org/0000-0002-8599-9903
Abstract
In the case of quasi-brittle material, there is a zone of non-linear behaving material, near the crack tip. A major part of this zone forms a socalled fracture process zone (FPZ), where mechanisms of material toughening take place. The main idea is to estimate the size of the fracture process zone under various types of load by using X-ray tomography. The estimation of the zone is supported by the theory of linear elastic fracture mechanics (LEFM) that could be a limit case of quasi-brittle mechanics. The size of the zone envelop is provided in X-ray snaps and compared with the theoretical size from LEFM.
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