Modeling plastic anisotropy evolution of AISI 304 steel sheets by a polynomial yield function

In this study, a numerical model for the evolution of plastic anisotropy is investigated for the purpose of stamping method design by Finite Element (FE) analysis and proved experimentally via process simulations of a cold-rolled austenitic stainless steel (AISI 304) sheet. The plastic anisotropy of...

Full description

Saved in:
Bibliographic Details
Published in:SN applied sciences 2021-02, Vol.3 (2), p.181, Article 181
Main Authors: Sener, Bora, Esener, Emre, Firat, Mehmet
Format: Article
Language:English
Subjects:
Accuracy
Aluminum alloys
Anisotropy
Applications
Applied and Technical Physics
Austenitic stainless steels
Chemistry/Food Science
Computation
Computational
Computer applications
Crack initiation
Deformation
Earth Sciences
Engineering
Engineering: Mechanical Engineering: Design
Environment
Evolution
Experiments
Ferritic stainless steel
Finite element method
Materials Science
Mathematical models
Mechanical properties
Metal forming
Metal sheets
Numerical models
Plane stress
Plastic anisotropy
Plastic deformation
Plastics
Polynomials
Ratios
Research Article
Rolling direction
Simulation
Stainless steel
Stamping
Strain
Tensile tests
Yield stress
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In this study, a numerical model for the evolution of plastic anisotropy is investigated for the purpose of stamping method design by Finite Element (FE) analysis and proved experimentally via process simulations of a cold-rolled austenitic stainless steel (AISI 304) sheet. The plastic anisotropy of the sheets is described with a fourth-order homogenous polynomial yield function and this modelling approach is enhanced by plastic strain dependent material coefficients. Tensile tests of coupon specimens taken along the different directions from rolling direction, and flow strength and deformation anisotropies are described with the planar variations of yield stress and plastic strain ratio computed at four plastic strain levels (0.002, 0.02, 0.05 and 0.18). A new numerical approach is, then, applied to identify polynomial coefficients ensuring an orthotropic positive-definite, convex yield surface with a well-defined stress gradient at every loading point on plane stress subspace. The developed computational model is implemented into general purpose explicit FE analysis software Ls-Dyna by a user-defined material model subroutine (UMAT) and applied in the stamping simulation of AISI 304 steel rectangular cups for the house-hold applications. The computed thickness distributions and the flange geometries were compared with measurements and it was observed that the best predictions were done with material parameters at %5 plastic strain level.
ISSN:2523-3963
2523-3971
DOI:10.1007/s42452-021-04206-2