Finite Element Calculation of Anisotropy of Hole Expansion in a Thin Steel Sheet with Six Degrees Polynomial Yield Function

Seung Yong Yang; Wei Tong

doi:10.4028/www.scientific.net/KEM.794.260

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 794Finite Element Calculation of Anisotropy of Hole...

Finite Element Calculation of Anisotropy of Hole Expansion in a Thin Steel Sheet with Six Degrees Polynomial Yield Function

Abstract:

A sixth order yield function was used to analyze the anisotropic plasticity behavior of sheet metal forming. Based on a complete sixth order homogenous polynomial in plane stress, the yield function was implemented as user material subroutines in the FE code ABAQUS Explicit and Standard. The associated flow rule and isotropic hardening were assumed. Material parameter values in the yield function were decided by uniaxial yield stresses and plastic strain ratios along 7 different loading orientations and plane strain yield and equal biaxial stresses and plastic strain ratio. To show the superiority of the sixth order yield function, the hole expansion test by Kuwabara et al.[1] was considered. The results of finite element simulation using the sixth order yield function showed a better agreement with the test results than YLD2000-2D yield function with M=6.

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Periodical:

Key Engineering Materials (Volume 794)

Pages:

260-266

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.794.260

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Online since:

February 2019

Authors:

Seung Yong Yang, Wei Tong

Keywords:

Anisotropy, Hole Expansion, Sheet Metal, Yield Function

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References

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