Modeling of anisotropic hardening and grain size effects based on advanced numerical methods and crystal plasticity

• Autorzy: Berisha B. , Hirsiger S. , Hippke H. , Hora P. , Mariaux A. , Leyvraz D. , Bezençon C.

Identyfikatory

DOI

10.24423/aom.3150

• Konferencja: Solid Mechanics Conference (SolMech 2018) (41 ; 27–31.08. 2018 ; Warsaw, Poland)
• Języki publikacji: EN

Abstrakty

EN

Modeling of anisotropic behavior as well as hardening behavior based on micromechanical quantities in combination with a spectral solver is the focus of this study. A deep drawing steel as well as two different aluminum alloys are investigated. Prediction capabilities of the proposed modeling strategy are discussed and the benefits of the micromechanical model are highlighted. Further, a comparison of the crystal plasticity (CP) results with the well established macroscopic model YLD2000-2d underlines the importance of the CP as a complementary modeling technique to the macroscopic modeling. Both models – the microscopic as well as the macroscopic – are validated on experimental data mainly gained from uniaxial and biaxial tests. In the second part of this study, strong inhomogeneous microstructures are investigated from a modeling point of view. For this purpose, a Hall–Petch phenomenological model is implemented in the CP open-source code DAMASK to take the grain size effects into account. Appropriate combinations of the grain sizes in a bimodal microstructure are presented in order to increase the strength as well as ductility of a generic aluminium alloy. The proposed numerical strategy of coupling the CP and efficient FFT-based spectral solver supports the development of new materials in an optimal way.

Słowa kluczowe

EN

bimodal microstructures; anisotropic hardening; crystal plasticity; Fast Fourier Transform; grain size effects

• Wydawca: Instytut Podstawowych Problemów Techniki PAN
• Czasopismo: Archives of Mechanics
• Rocznik: 2019
• Tom: Vol. 71, nr 4-5
• Strony: 489--505
• Opis fizyczny: Bibliogr. 44 poz., rys. kolor.

Twórcy

autor

Berisha B.

• Inspire AG, Institute of Virtual Manufacturing (inspire-ivp), Tannenstrasse 3, 8092 Zurich, Switzerland

autor

Hirsiger S.

• ETH Zurich, Institute of Virtual Manufacturing (ivp), Tannenstrasse 3, 8092 Zurich, Switzerland

autor

Hippke H.

• ETH Zurich, Institute of Virtual Manufacturing (ivp), Tannenstrasse 3, 8092 Zurich, Switzerland

autor

Hora P.

• ETH Zurich, Institute of Virtual Manufacturing (ivp), Tannenstrasse 3, 8092 Zurich, Switzerland

autor

Mariaux A.

• Novelis Switzerland SA, Route des Laminoirs 15, 3960 Sierre, Switzerland

autor

Leyvraz D.

• Novelis Switzerland SA, Route des Laminoirs 15, 3960 Sierre, Switzerland

autor

Bezençon C.

• Novelis Switzerland SA, Route des Laminoirs 15, 3960 Sierre, Switzerland

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Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).