Parameter Identification and Modeling of Hardening to Preserve Identical Predictions under Monotonic Loading

Yan Feng Yang; Gabriela Vincze; Cyrille Baudouin; Hocine Chalal; Tudor Balan

doi:10.4028/p-mk9u2c

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 926Parameter Identification and Modeling of Hardening...

Parameter Identification and Modeling of Hardening to Preserve Identical Predictions under Monotonic Loading

Abstract:

Advanced hardening models accurately describe the transient plastic behavior (reyielding, stagnation, resumption...) after various strain-path changes (reverse, orthogonal...). However, a common drawback of these models is that they usually predict monotonic loading with lower accuracy than the regular isotropic hardening models. Consequently, the finite element predictions using these models may sometimes lose in accuracy, in spite of their tremendous theoretical superiority. This drawback has been eliminated in the literature for the Chaboche isotropic-kinematic hardening model. In this work, a generic approach is proposed for advanced hardening models. Arbitrary models could be successfully compensated to preserve rigorously identical predictions under monotonic loading. A physically-based model involving a 4^th order tensor and two 2^nd order tensors was used for the demonstration. The parameter identification procedure was greatly simplified by rigorously decoupling the identification of isotropic hardening parameters from the other parameters.

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Periodical:

Key Engineering Materials (Volume 926)

Pages:

2258-2265

DOI:

https://doi.org/10.4028/p-mk9u2c

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Online since:

July 2022

Authors:

Yan Feng Yang, Gabriela Vincze, Cyrille Baudouin, Hocine Chalal, Tudor Balan*

Keywords:

Hardening Model, Parameter Identification, Sheet Metal, Strain-Path Change

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* - Corresponding Author

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