Advances in experiments on metal sheets and tubes in support of constitutive modeling and forming simulations

Kuwabara, Toshihiko

doi:10.1016/j.ijplas.2006.06.003

Cited by 307 publications

(123 citation statements)

References 100 publications

(144 reference statements)

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“…Representation of the full stress-strain curve is particularly important in analytical, numerical or design models for scenarios in which large plastic strains are encountered. Such scenarios include the simulation of section forming [1], the response of structures under extreme loads [2,3], the modelling and design of connections [4,5] and the design of structural elements incorporating inelastic behaviour and strain hardening [6,7].…”

Section: Introductionmentioning

confidence: 99%

Stress-strain curves for hot-rolled steels

Yun

Gardner

2017

Journal of Constructional Steel Research

361

190

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The use of advanced analytical and numerical modelling in structural engineering has increased rapidly in recent years. A key feature of these models is an accurate description of the material stress-strain behaviour. Development of standardised constitutive equations for the full engineering stress-strain response of hot-rolled carbon steels is the subject of the present paper.The proposed models, which offer different options for the representation of the strain hardening region, feature an elastic response up to the yield point, followed by a yield plateau and strain hardening up to the ultimate tensile stress. The Young's modulus E, the yield stress fy and the ultimate stress fu are generally readily available to the engineer, but other key parameters, including the strains at the onset of strain hardening and at the ultimate stress, are not, and hence require predictive expressions. These expressions have been developed herein and calibrated against material stress-strain data collected from the literature. Unlike the widely used ECCS model, which has a constant length of yield plateau and constant strain hardening slope, the proposed models, reflecting the collected test data, have a yield plateau length and strain hardening characteristics which vary with the ratio of yield to ultimate stress (i.e. with material grade). The proposed models require three basic input parameters (E, fy and fu), are simple to implement in analytical or numerical models, and are shown herein to be more accurate than the widely employed ECCS model. The proposed models are based on and hence representative of modern hot-rolled steels from around the world.

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Section: Introductionmentioning

confidence: 99%

Stress-strain curves for hot-rolled steels

Yun

Gardner

2017

Journal of Constructional Steel Research

361

190

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“…These complex strain paths, coupled with elastic/plastic anisotropy of polycrystals, result in heterogeneous distributions of intergranular strains, governing macroscopic response such as yield strength, work hardening, etc. Although biaxial testing is increasingly used to study macroscopic behavior of materials, [1][2][3] limited research efforts have been directed toward understanding the underlying microstructure and intergranular strain evolution. [4][5][6] In-situ neutron and synchrotron x-ray diffraction are well established techniques to study internal stress and microstructure evolution.…”

Section: Introductionmentioning

confidence: 99%

Intergranular Strain Evolution During Biaxial Loading: A Multiscale FE-FFT Approach

Upadhyay

Čapek

Petegem

et al. 2017

JOM

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“…ISO 16842 is the first standardization of biaxial tensile specimen, applies, however, to sheet metals, only [3]. Nevertheless, a range of specimen geometries have been proposed in literature, and reviews can be found in [4], [5] and [6]. Demmerle and Boehler [7] numerically optimized a cruciform specimen shape for sheet metals with respect to homogeneity and predictability of stress in an area of reduced thickness.…”

Section: Introductionmentioning

confidence: 99%

Parametric shape optimization of biaxial tensile specimen

Bauer

Priesnitz

Schemmann

et al. 2016

Proc Appl Math and Mech

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Common cruciform specimen for biaxial tensile testing of sheet moulding compound, take damage and finally fail in uniaxially loaded areas. When using these specimen, an observation of damage initialization and failure in biaxially loaded areas is, therefore, not possible. In this paper, a parametric shape optimization is described to find a more suitable specimen shape. The parametrization of the specimen is presented. Objective functions are introduced to measure the appropriateness of specimen. A weighted summation transfers the constraint multiobjective optimization problem into a constraint scalar-valued problem. Findings of experiments suggest that a specimen shape with straight, non-tapering arms and slits along the arms is reasonable.

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Advances in experiments on metal sheets and tubes in support of constitutive modeling and forming simulations

Cited by 307 publications

References 100 publications

Stress-strain curves for hot-rolled steels

Stress-strain curves for hot-rolled steels

Intergranular Strain Evolution During Biaxial Loading: A Multiscale FE-FFT Approach

Parametric shape optimization of biaxial tensile specimen

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