Variability of sheet formability and formability testing

Karthik, V.; Comstock, R. J.; Hershberger, D.L; Wagoner, R. H.

doi:10.1016/s0924-0136(01)01219-5

Cited by 45 publications

(29 citation statements)

References 8 publications

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“…Karthik et al [160] have studied the coil-to-coil, test-to-test and laboratoty-tolaboratory variability of sheet formability using OSU formability test. On the basis of the variability of the limit strains established by experiments [70,242], Janssens et al [153] introduced the Forming Limit Band concept.…”

Section: Modeling the Forming Limit Band Conceptmentioning

confidence: 99%

Advances in anisotropy and formability

et al. 2010

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This paper presents synthetically the most recent models for description of the anisotropic plastic behavior. The first section gives an overview of the classical models. Further, the discussion is focused on the anisotropic formulations developed on the basis of the theories of linear transformations and tensor representations, respectively. Those models are applied to different types of materials: body centered, faced centered and hexagonalclose packed metals. A brief review of the experimental methods used for characterizing and modeling the anisotropic plastic behavior of metallic sheets and tubes under biaxial loading is presented together with the models and methods developed for predicting and establishing the limit strains. The capabilities of some commercial programs specially designed for the computation of forming limit curves (FLC) are also analyzed.

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Section: Modeling the Forming Limit Band Conceptmentioning

confidence: 99%

Advances in anisotropy and formability

et al. 2010

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“…In some cases, the uncertainty ranges can be quite large for several parameters which may affect the process stability. For example, Karthic et al [14] have shown that for different coils of same material, the strain hardening parameter can have coil-to-coil variation up to 14%. In the same research paper, it was shown that the variability which may affect the anisotropy coefficients from one coil to another is important.…”

Section: Introductionmentioning

confidence: 99%

A probabilistic approach for optimising hydroformed structures using local surrogate models to control failures

Abdessalem

Hami²

2015

International Journal of Mechanical Sciences

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“…The variability of mechanical property of sheet metal and their effect in a forming process has been studied by other researcher. Karthik et al [1] have carried out tensile and formability tests independently at three laboratories using more than 45 coils of materials. They concluded that coilto-coil variations are higher than the observed test-to-test.…”

Section: Introductionmentioning

confidence: 99%

Influence of Material Property Variability on the Thickness in Sheet Metal Subjected to the Hydraulic Bulging

Lăzărescu

Banabic

2013

AEF

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Abstract. In the sheet metal forming processes, the inherent unavoidable noise in material property, which can vary inside and between batches as well as between suppliers, constitutes an important source of uncertainty which could result in rejection of some formed parts. In the process design phase, a successful tool for the sensitivity analysis proved to be the finite element codes, in which case the material parameters are used as input into the yield criterion. This paper investigates the thickness sensitivity due to the noise in material property using the finite element simulation of hydraulic bulge test. The BBC 2005 yield criterion with eight constitutive parameters, which is implemented in the commercially finite element code AutoForm has been used in this study.

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Variability of sheet formability and formability testing

Cited by 45 publications

References 8 publications

Advances in anisotropy and formability

Advances in anisotropy and formability

A probabilistic approach for optimising hydroformed structures using local surrogate models to control failures

Influence of Material Property Variability on the Thickness in Sheet Metal Subjected to the Hydraulic Bulging

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