Hlavní stránka > Konferenční materiály > Příspěvky z konference > Numerical calibration of material parameters of selected directional distortional hardening models with combined approach using both distorted yield surfaces and stress-strain curves
Název:
Numerical calibration of material parameters of selected directional distortional hardening models with combined approach using both distorted yield surfaces and stress-strain curves
Autoři:
Hrubý, Zbyněk ; Plešek, Jiří ; Parma, Slavomír ; Marek, René ; Feigenbaum, H. P. ; Dafalias, Y.F. Typ dokumentu: Příspěvky z konference Konference/Akce: Výpočty konstrukcí metodou konečných prvků 2015, Praha (CZ), 2015-11-26
Rok:
2015
Jazyk:
eng
Abstrakt: The plastic strain induced anisotropy is a well-known phenomenon in manufacturing and directional distortional hardening represents a very promising way to capture real plastic behavior of metals. Many papers were published in the past typically extending the von Mises yield criterion with directionally dependent internal variable and defining yield point at the basis of plastic strain offset. Material parameters of these models were typically calibrated at the basis of deformed yield surfaces only, which – as revealed – could lead to certain discrepancies in simple stress-strain response. Presented paper introduces a numerical calibration approach taking both distorted yield surfaces and stress-strain curves information into account. Besides the calibration procedures, innovative applications of experimental techniques such as the acoustic emission for an acquisition of yield inception and plastic straining, convexity of the models, or numerical implementation of these models are discussed.
Klíčová slova:
calibration procedures; deformed yield surfaces; directional distortional hardening; numerical implementation; stress-strain curves Číslo projektu: LH14018 (CEP), GA15-20666S (CEP) Poskytovatel projektu: GA MŠk, GA ČR Zdrojový dokument: Výpočty konstrukcí metodou konečných prvků 2015, ISBN 978-80-87012-56-7
Instituce: Ústav termomechaniky AV ČR
(web)
Informace o dostupnosti dokumentu:
Dokument je dostupný v příslušném ústavu Akademie věd ČR. Původní záznam: http://hdl.handle.net/11104/0254845