On the modeling of hardening in metals during non-proportional loading

Wang, J.; Levkovitch, Vladislav; Reusch, F.; Svendsen, Bob; Huétink, J.; Riel, M. van

doi:10.1016/j.ijplas.2007.08.009

Cited by 64 publications

(64 citation statements)

References 37 publications

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“…The Hoferlin approach (Fig.1a) [3] which is based on the Teodosiu and Hu model indicates no cross hardening for this load sequence whereas the current approach does (Fig.1b). The behavior of the current approach is confirmed by the experimental results [1]. a) b) …”

Section: Modelsupporting

confidence: 69%

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Comparison of two different models to account for induced flow anisotropy during complex loading processes

Barthel

Svendsen

Levkovitch

et al. 2008

Proc Appl Math and Mech

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Some metals exhibit an increase of the yield stress after orthogonal strain path changes, i.e. so-called cross hardening. Two approaches are discussed in this work which are capable of taking that effect into account in an appropriate manner. The first approach is closely related to that of Teodosiu and Hu. The second model considers besides the movement of the center of the yield surface and its proportional expansion also the change of its shape and is able to describe the induced anisotropic behavior with regard to complicated loading histories.

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Section: Modelsupporting

confidence: 69%

“…Compared to a shear experiment the experiments with the orthogonal strain path change show an increase of the yield stress which is known as cross hardening. This holds for the steel DC06 as well as for the relativly new developed steel LH 800 [1].…”

Section: Introductionmentioning

confidence: 75%

Comparison of two different models to account for induced flow anisotropy during complex loading processes

Barthel

Svendsen

Levkovitch

et al. 2008

Proc Appl Math and Mech

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“…The purpose of the current work is the comparison of a recent model [1] for evolving anisotropic hardening due to such dislocation microstructural development during non-proportional loading with a second such model. In these models, the directional-dependence of the hardening behavior resulting from the dislocation microstructural development is idealized phenomenologically in the form of evolving structural tensors.…”

Section: Materials Modelsmentioning

confidence: 99%

Formulation and application of models for anisotropic hardening in sheet metals subject to complex loading‐path changes

Clausmeyer

Noman

Svendsen

2009

Proc Appl Math and Mech

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In this work material models for the simulation of forming processes involving non-uniform loading path changes are investigated. Materials exhibiting an evolution of the yield surface due to the formation and interaction of dislocation structures on the micro structural level are modeled by employing evolving structural tensors. These account for the evolution of anisotropy and hardening behavior known from technical alloys on a phenomenological basis. In a first step material parameters are identified from experiments for non-uniform loading conditions. In a second step, the evolution of structural tensors for varying loading conditions is investigated and related to the evolution of kinematic quantities. Finally applications relevant to the simulation of sheet metal forming processes are presented.

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“…Verification of the quality through various tests is essential outside monitored dimensional characteristics [1][2][3][4]. One of the basic tests is the tensile test, by which we can characterize the plastic properties of materials.…”

Section: Introductionmentioning

confidence: 99%

Tribological behaviour and local mechanical properties of magnesium-alumina composites

HUANG¹,

LIN²,

Ballóková³

et al. 2016

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The article is focused on the stress analysis of plane specimens made from hypocutectoid steel, using digital image correlation. It is steel used in the manufacture of railway wheels for freight transport.The aim of the article is to measure the displacement fields by using digital image correlation, from which the strain fields are subsequently calculated. By processing the obtained values using the virtual fields method, the isotropic elastic constants and the hardening behaviour were obtained, which are used to calculate the subsequent stress fields, and they are also used to draw a diagram of engineering and true stress. The maximum average values of stress obtained from true stress -true strain diagram were 990 ± 21 MPa and from engineering diagram 897 ± 18 MPa. The deviation between maximum true and engineering average values of stress was 9 %. The stress fields obtained for 25 and 58 % strains are illustrated in the article. K e y w o r d s : digital image correlation, virtual fields method, true stress-true strain diagram, engineering diagram

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On the modeling of hardening in metals during non-proportional loading

Cited by 64 publications

References 37 publications

Comparison of two different models to account for induced flow anisotropy during complex loading processes

Comparison of two different models to account for induced flow anisotropy during complex loading processes

Formulation and application of models for anisotropic hardening in sheet metals subject to complex loading‐path changes

Tribological behaviour and local mechanical properties of magnesium-alumina composites

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