FRACTURE TOUGHNESS NUMERICAL MODELLING OF THE MARTENSITIC CHROMIUM STEEL

1 DUNDULIS Gintautas
Co-authors:
1 JANULIONIS Remigijus 1 MAKAREVIČIUS Vidas 1 GRYBĖNAS Albertas
Institution:
1 Lithuanian Energy Institute, Breslaujos str. 3, Kaunas, Lithuania, Gintautas.Dundulis@lei.lt
Conference:
25th Anniversary International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 25th - 27th 2016
Proceedings:
Proceedings 25th Anniversary International Conference on Metallurgy and Materials
Pages:
592-597
ISBN:
978-80-87294-67-3
ISSN:
2694-9296
Published:
14th December 2016
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
71 views / 34 downloads
Abstract

To evaluate the resistance to failure of the constructions with cracks usually the fracture criterions are used. One of such criterion used to evaluate failure is J-integral. Calculated value of failure criteria in construction with crack is compared with its critical value for the material the construction is made of. The values of J-integral for the materials are usually experimentally determined. This article presents the methodology for the determination of J-integral using numerical methods. For this purpose the Finite Element (FE) code ABAQUS was used.The modelling of the J-integral of steel P91 was performed. 2D and 3D FE models were used for this purpose. The experimental stress – strain curve was used as material description. For crack growth calculation the crack opening displacement as a function of crack length is presented. The prognosis results of J-integral were compared with experiment data.As results of investigation the J-integral of steel P91 was determined. Prognosis results were compared with experiment. Numerically determined J-integral has acceptable coincidence with experiment results.

Keywords: Finite element method, fracture mechanic, J-integral

© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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