Finite element simulation and comparison of a shear strain and equivalent strain during ECAP and asymmetric rolling

3rd International Conference on Smart Material Research

Pesin, A.^1 ; Pustovoytov, D.^1 ; Shveyova, T.^1 ; Vafin, R.^1

Nosov Magnitogorsk State Technical University, 38, Lenin prospect, Magnitogorsk

455000, Russia^1

关键词: Asymmetric rolling;    Deformation Characteristics;    Equivalent strains;    FEM simulations;    Finite element simulations;    Nonlinear effect;    Pure and simple shears;    Severe plastic deformations;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/293/1/012007/pdf
DOI  :  10.1088/1757-899X/293/1/012007

来源: IOP

【 摘 要 】

The level of a shear strain and equivalent strain plays a key role in terms of the possibility of using the asymmetric rolling process as a method of severe plastic deformation. Strain mode (pure shear or simple shear) can affect very strongly on the equivalent strain and the grain refinement of the material. This paper presents the results of FEM simulations and comparison of the equivalent strain in the aluminium alloy 5083 processed by a single-pass equal channel angular pressing (simple shear), symmetric rolling (pure shear) and asymmetric rolling (simultaneous pure and simple shear). The nonlinear effect of rolls speed ratio on the deformation characteristics during asymmetric rolling was found. Extremely high equivalent strain up to e=4.2 was reached during a single-pass asymmetric rolling. The influence of the shear strain on the level of equivalent strain is discussed. Finite element analysis of the deformation characteristics, presented in this study, can be used for optimization of the asymmetric rolling process as a method of severe plastic deformation.