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Original title:
Numerical calibration of material parameters of selected directional distortional hardening models with combined approach using both distorted yield surfaces and stress-strain curves
Authors: Hrubý, Zbyněk ; Plešek, Jiří ; Parma, Slavomír ; Marek, René ; Feigenbaum, H. P. ; Dafalias, Y.F.
Document type: Papers
Conference/Event: Výpočty konstrukcí metodou konečných prvků 2015, Praha (CZ), 2015-11-26
Year: 2015
Language: eng
Abstract: 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.
Keywords: calibration procedures; deformed yield surfaces; directional distortional hardening; numerical implementation; stress-strain curves
Project no.: LH14018 (CEP), GA15-20666S (CEP)
Funding provider: GA MŠk, GA ČR
Host item entry: Výpočty konstrukcí metodou konečných prvků 2015, ISBN 978-80-87012-56-7
Institution: Institute of Thermomechanics AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0254845
Permalink: http://www.nusl.cz/ntk/nusl-201398
The record appears in these collections:
Research > Institutes ASCR > Institute of Thermomechanics
Conference materials > Papers
Authors: Hrubý, Zbyněk ; Plešek, Jiří ; Parma, Slavomír ; Marek, René ; Feigenbaum, H. P. ; Dafalias, Y.F.
Document type: Papers
Conference/Event: Výpočty konstrukcí metodou konečných prvků 2015, Praha (CZ), 2015-11-26
Year: 2015
Language: eng
Abstract: 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.
Keywords: calibration procedures; deformed yield surfaces; directional distortional hardening; numerical implementation; stress-strain curves
Project no.: LH14018 (CEP), GA15-20666S (CEP)
Funding provider: GA MŠk, GA ČR
Host item entry: Výpočty konstrukcí metodou konečných prvků 2015, ISBN 978-80-87012-56-7
Institution: Institute of Thermomechanics AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0254845
Permalink: http://www.nusl.cz/ntk/nusl-201398
The record appears in these collections:
Research > Institutes ASCR > Institute of Thermomechanics
Conference materials > Papers
Record created 2016-01-11, last modified 2021-11-24