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[25721] Artykuł: Prediction of Ductile Fracture for S235JR Steel Using the Stress Modified Critical Strain and Gurson-Tvergaard-Needleman ModelsCzasopismo: Journal of Materials in Civil Engineering Tom: 24, Zeszyt: 12, Strony: 1492-1500ISSN: 0899-1561 Wydawca: ASCE-AMER SOC CIVIL ENGINEERS, 1801 ALEXANDER BELL DR, RESTON, VA 20191-4400 USA Opublikowano: Grudzień 2012 Autorzy / Redaktorzy / Twórcy
Grupa MNiSW: Publikacja w czasopismach wymienionych w wykazie ministra MNiSzW (część A) Punkty MNiSW: 25 Klasyfikacja Web of Science: Article DOI Web of Science Keywords: S235JR steel  Stress modified critical strain SMCS model  Gurson-Tvergaard-Needleman GTN model  Numerical simulations  Failure criterion  Microstructural examinations  |
This paper presents results of experimental and numerical modeling of ductile fracture and failure of elements made of S235JR steel subjected to static tension. The prediction of failure was generally based on the stress modified critical strain (SMCS) model. The numerical simulations were performed using the Gurson-Tvergaard-Needleman (GTN) model, which takes into consideration the material structure. The approach applied in this study was based on the computational cells with microstructurally based length scales. The cell size and initial porosity were determined through microstructural examinations of S235JR steel. The parameters of the GTN model for S235JR steel were established on the basis of the microstructural analysis and the numerical modeling of tensile strength tests. As a result, it was possible to determine the SMCS failure criterion to predict ductile fracture for S235JR steel. DOI: 10.1061/(ASCE)MT.1943-5533.0000546. (C) 2012 American Society of Civil Engineers.