Comparison of various ductile fracture models and their fracture envelopes

• Autorzy: Sebek F. , Kubik P. , Hulka J , Petruska J.

Warianty tytułu

CS

Srovnani ruznych modelu tvarneho porusovani a jejich ploch poruseni

• Konferencja: International Seminar of Applied Mechanics (17 ; 13-15.09.2013 ; Ustroń, Polska)
• Języki publikacji: EN

Abstrakty

EN

For the best prediction of ductile fracture when complex loading is applied, it is necessary to calibrate and to use convenient ductile fracture model. Ductile fracture initiation is especially influenced by the shape of fracture envelope. Hence, such model should consider the dependence of the stress triaxiality and deviatoric state parameter to fracture strain. In this paper are presented shapes of fracture envelopes for various fracture models which were calibrated for the austenitic stainless steel. Firstly, the plasticity of given steel was investigated. Then, the calibration constants of selected ductile fracture models were identified using various specimens and experiments. Finally, the description of their suitability is discussed.

CS

Pro co nejlepší predikci tvárného porušování při aplikování komplexního zatěžování je třeba kalibrovat a používat vhodný model tvárného porušování. Iniciace tvárného porušování je zvláště ovlivněna tvarem plochy porušení. Tudíž takový model by měl uvažovat dopad triaxiality napětí a deviátorového parametru na lomové přetvoření. V tomto článku jsou prezentovány tvary ploch porušení pro různé modely porušování, které byly kalibrovány pro austenitickou nerezovou ocel. Nejprve byla studována plasticita dané oceli. Poté byly identifikovány kalibrační konstanty vybraných modelů tvárného porušování pomocí různých vzorků a experimentů. Nakonec je diskutován popis vhodnosti jejich použití.

Słowa kluczowe

EN

ductile fracture; calibration; finite element method; austenitic stainless steel; non-linear least square method

PL

przełom plastyczny; kalibracja; metoda elementów skończonych; nierdzewna stal austenityczna; nieliniowa metoda najmniejszych kwadratów

• Wydawca: Wydawnictwo Katedry Mechaniki Teoretycznej i Stosowanej
• Czasopismo: Modelling and Optimization of Physical Systems
• Rocznik: 2013
• Tom: z. 12
• Strony: 53--58
• Opis fizyczny: Bibliogr. 14 poz.

Twórcy

autor

Sebek F.

• Institute of Solid Mechanics, Mechatronics and Biomechanics, Faculty of Mechanical Engineering, Brno University of Technology, Technicka 2896/2, 616 69, Brno, Czech Republic

autor

Kubik P.

• Institute of Solid Mechanics, Mechatronics and Biomechanics, Faculty of Mechanical Engineering, Brno University of Technology, Technicka 2896/2, 616 69, Brno, Czech Republic

autor

Hulka J

• Institute of Solid Mechanics, Mechatronics and Biomechanics, Faculty of Mechanical Engineering, Brno University of Technology, Technicka 2896/2, 616 69, Brno, Czech Republic

autor

Petruska J.

• Institute of Solid Mechanics, Mechatronics and Biomechanics, Faculty of Mechanical Engineering, Brno University of Technology, Technicka 2896/2, 616 69, Brno, Czech Republic

Bibliografia

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