Stress–strain responses for continuous orthogonal strain path changes with increasing sharpness

Riel, M. van; Boogaard, A.H. van den

doi:10.1016/j.scriptamat.2007.05.005

Cited by 40 publications

(19 citation statements)

References 14 publications

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“…The horizontal and vertical force are recorded such that, together with the known geometry, the Cauchy stresses T 22 and T 12 can be computed. Further details concerning the experimental setup can be found in [26,37,38]. In all experiments the strain rate was set to 10 −3 1/s.…”

Section: Test Setupmentioning

confidence: 99%

Phenomenological modeling of anisotropy induced by evolution of the dislocation structure on the macroscopic and microscopic scale

et al. 2011

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This work focuses on the modeling of the evolution of anisotropy induced by the development of the dislocation microstructure. A model formulated at the engineering scale in the context of classical metal plasticity and a model formulated in the context of crystal plasticity are presented. Images obtained by transmission-electron microscopy (TEM) show the influence of the strain path on the evolution of anisotropy for the case of two common materials used in sheet metal forming, DC06 and AA6016-T4. Both models are capable of accounting for the transient behavior observed after changes in loading path for fcc and bcc metals. The evolution of the internal variables of the models is correlated with the evolution of the dislocation structure observed by TEM investigations.

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Section: Test Setupmentioning

confidence: 99%

Phenomenological modeling of anisotropy induced by evolution of the dislocation structure on the macroscopic and microscopic scale

et al. 2011

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“…In particular, the latter is in contrast to previous studies, which focused on uniaxial rather than plane-strain tension. Although the stress-deformation behavior of DC06 for this latter type of loading has already been investigated [24], the corresponding microstructure development in DC06 has not been reported on in the literature. The present work contributes to the creation of a "library" of representative dislocation microstructures and their corresponding stress-deformation relation for the class of ferritic interstitial free steels.…”

Section: Introductionmentioning

confidence: 99%

Experimental characterization of microstructure development during loading path changes in bcc sheet steels

et al. 2012

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Interstitial free sheet steels show transient work hardening behavior, i.e. the Bauschinger effect and cross hardening after changes in loading path. This behavior affects sheet forming processes and the properties of the final part. The transient work hardening behavior is attributed to changes in the dislocation structure. In this work, the morphology of the dislocation microstructure is investigated for uniaxial and plane strain tension, monotonic and forward to reverse shear, as well as plane strain tension to shear. Characteristic features such as the thickness of cell walls and the shape of cells are used to distinguish microstructural patterns corresponding to different loading paths. The influence of crystallographic texture on the dislocation structure

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“…The lack of certain stress/ strain components (such as the negligible shear strain for rectangular strip tensile test) will lead to inaccurate identification for the corresponding constitutive parameters. Therefore, it is necessary to design a suitable deformation configuration that can provide heterogeneous stress/strain distributions such as in [16,19]. However, for the HAH model, the sought constitutive parameters k 1~k5 , C, ε 0 , and n are involved with the equivalent stress instead of individual stress components, as shown in Eq.…”

Section: Numerical Implementation and Discussionmentioning

confidence: 99%

Parameter identification of the homogeneous anisotropic hardening model using the virtual fields method

Barlat

Kim

2015

Int J Mater Form

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In this paper, the virtual fields method is applied to identify the constitutive parameters of the homogeneous yield function-based anisotropic hardening model. The procedure, previously developed for isotropic hardening law, is extended to the anisotropic case in this study. For validation purpose, a finite element model is developed to check the feasibility of the proposed methodology in retrieving the target constitutive parameters. The identification results are critically discussed. The suitability of this finite element model is also assessed with a view to future experiments.

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Stress–strain responses for continuous orthogonal strain path changes with increasing sharpness

Cited by 40 publications

References 14 publications

Phenomenological modeling of anisotropy induced by evolution of the dislocation structure on the macroscopic and microscopic scale

Phenomenological modeling of anisotropy induced by evolution of the dislocation structure on the macroscopic and microscopic scale

Experimental characterization of microstructure development during loading path changes in bcc sheet steels

Parameter identification of the homogeneous anisotropic hardening model using the virtual fields method

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