Estudo dos campos de tensão gerados por inclusões durante o processo de torneamento em aços ABNT 1045 utilizando o método dos elementos finitos. / A study of stress fields due to inclusions during turning of ABNT 1045 by using the finite element method.

AUTOR(ES)
DATA DE PUBLICAÇÃO

2008

RESUMO

MnS inclusions are non-metallic compounds formed in steel due to chemical reactions between sulfur and manganese. The formation of MnS inclusions during steel production is generally expected and sometimes desired in steels for machining applications. During machining, the stress concentrating effect due to MnS inclusions is determined by factors such as their size, shape and distribution in the metallic matrix. Several experimental studies have been conducted in this area; nevertheless, there are no consolidated numerical models. The main objective of this work was to analyze the relationship between the microstructure of two steels (ABNT 1045) and their machinability. A numerical model was proposed to study the stress fields during the cutting process, considering the microstructural aspects of steels (mainly the MnS inclusions). Stresses during turning were simulated based on experimental measurements of cutting and feed forces. A good agreement between the numerical model and experimental results was observed. Numerical results confirm that MnS inclusions are stress concentrators and their morphology and distribution influence the materials machinability.

ASSUNTO(S)

aço finite element method stress fields processos de fabricação (engenharia mecânica) machining método dos elementos finitos steel usinagem tensão dos materiais mns inclusions

ACESSO AO ARTIGO

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