Elastic—plastic analysis of the stress and strain distributions in asymmetric rolling

Richelsen, Ann Bettina

doi:10.1016/s0020-7403(97)00013-1

Cited by 70 publications

(41 citation statements)

References 11 publications

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“…In particular, asymmetric rolling can significantly modify shear strains arising from the contact conditions between the rolls and the sheet surfaces. [6] Several studies have shown that it is possible to obtain a quasi-constant shear strain distribution through the thickness of materials. [1,2,7] This is most directly interpreted based on the way in which the asymmetric rolling conditions modify the positions of the neutral points in the roll gap ( Figure 1).…”

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Deformation Geometry and Through-Thickness Strain Gradients in Asymmetric Rolling

Roumina

Sinclair

2008

Metall Mater Trans A

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Experiments and simulations focusing on cold rolling under conditions where the work roll velocities are different (asymmetric rolling) have been performed to provide a basic framework for understanding the effects of the roll velocity ratio and deformation geometry on through thickness shear strain development. It is shown that deformation geometry, controlled by varying the reduction per pass, has a significant impact on the through thickness shear strain gradients at a given level of asymmetry. Large reductions per pass lead to more uniform through thickness shear strains, but lower overall shear strain magnitudes compared to rolling conditions involving small reductions per pass. Moreover, the results show that a critical value of the roll velocity ratio exists, for a fixed set of rolling conditions, above which the shear strains induced by asymmetric rolling remain unchanged. This is interpreted based on the relative importance of geometrically induced shear strains and those arising from frictional effects. In this context, the position of the neutral points plays a vital role.

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Deformation Geometry and Through-Thickness Strain Gradients in Asymmetric Rolling

Roumina

Sinclair

2008

Metall Mater Trans A

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“…The above minimization can be managed by means of finite element formulation for an elastic-plastic material obeying Prandtl-Reuss constitutive equations under plain strain conditions, i.e., two-dimensional rolling condition (Richelsen 1997). The finite element formulation together with the Abaqus/Explicit solver was used to solve the deformation problem.…”

Section: Modelingmentioning

confidence: 99%

Simulation of non-isothermal recrystallization kinetics in cold-rolled steel

Mortazavi

Serajzadeh

2018

Multiscale and Multidiscip. Model. Exp. and Des.

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In this work, a model has been developed to determine thermal and microstructural events during non-isothermal annealing of rolled carbon steels. In the first place, the process of cold rolling under both symmetrical and asymmetrical conditions was mathematically modeled employing an elastic-plastic finite element formulation to define the distribution of plastic strain and internal stored energy. In the next step, two-dimensional model based on cellular automata was generated to assess softening kinetics in annealing treatment. At the same time, a thermal model based on Galerkin-finite element analysis was coupled with the microstructural model to consider temperature variations during heat treatment. The impact of different parameters such as heating rate, annealing temperature, and initial microstructures were all taken into account. To validate the employed algorithm, the predictions were compared with the experimental results and a reasonable agreement was found. Accordingly, the simulation results can be employed for designing a proper mechanical-thermal treatment to achieve the desired microstructure as well as mechanical properties under practical processing conditions.

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“…O efeito da pressão do cilindro sobre a chapa tende a diminuir ao longo de sua espessura, à medida que a altura inicial da chapa aumenta, conforme pode ser visto na figura 9. Esse fato certamente dependerá da intensidade da redução da chapa, ou seja, quanto maior a redução maior será o efeito da pressão contribuindo para elevar o valor de deformação efetiva ao centro da chapa, fato este corroborado pelos resultados obtidos por RICHELSEN [23]. …”

Section: Deformação Efetivaunclassified

O Programa Salf Como Ferramenta Para Análise Do Processo De Laminação a Frio

Costa¹,

Santos²

2017

Anais Do Seminário De Laminação E Conformação

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ResumoEste artigo apresenta o SALF, um software nacional desenvolvido para simular o processo de laminação a frio de chapas através do método dos elementos finitos. O programa utiliza a formulação implícita/rígido-plástica em suas análises. Simulações retiradas da literatura foram realizadas com o software, sendo os materiais simulados alumínio e aço, com espessuras de 3,0 mm e 1,0 mm, reduções de 5% e 30% e atrito de 0,06 a 0,15. Os resultados do SALF ficaram bem próximos dos resultados descritos na literatura. Desta forma, a partir de agora, as siderúrgicas nacionais têm uma ferramenta nacional para simular o processo de laminação a frio, a qual pode auxiliar na melhoria de seus processos e produtos. Palavras-chave: Laminação a frio de chapas; Método dos elementos finitos; Formulação implícita e rígido-plástica. SALF PROGRAM AS TOOL TO ANALYZE COLD FLAT ROLLING PROCESS AbstractThe article presents SALF program, a national software developed to simulate the cold rolling metal sheet process by the finite element method. The program uses the implicit and rigid-plastic approaches to perform numerical analyses. Simulations from the literature were performed using the program on materials such as steel and aluminum, with thicknesses of 1.0 mm and 3.0 mm, reductions of 5% and 30%, and friction coefficients of 0.1 and 0.3. There was a strong approximation between the program results and those described in the simulations chosen from the literature. However, starting now domestic steel industries may use a national program to simulate the cold flat rolling process to improve their processes and products.

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Elastic—plastic analysis of the stress and strain distributions in asymmetric rolling

Cited by 70 publications

References 11 publications

Deformation Geometry and Through-Thickness Strain Gradients in Asymmetric Rolling

Deformation Geometry and Through-Thickness Strain Gradients in Asymmetric Rolling

Simulation of non-isothermal recrystallization kinetics in cold-rolled steel

O Programa Salf Como Ferramenta Para Análise Do Processo De Laminação a Frio

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