A 2D finite element analysis of the effect of numerical parameters on the reliability of Ti6Al4V machining modeling

Abstract

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Numerical analysis of the Ti6Al4V behavior based on the definition of a new phenomenological model

“…The constitutive coefficients regrouped in the Tables 1 and 2 were defined. The physical material properties of the Ti6Al4V alloy defined in the numerical simulations corresponded to those used in the FE analysis of Yaich et al [21].…”

“…The Coulomb-Tresca friction model (see Eq. ( 25)), which has been commonly used in the literature review [3,7,21,36] to model the machining process, was defined to predict the stick-slip conditions induced in the contact interfaces. In order to model the important thermomechanical coupling conditions following the Ti6Al4V machining and resulting in pronounced heating of the workpiece and the cutting tool, all the energy generated by the friction work was assumed converted to a heat flow.…”

“…the machining process) has been underlined in the literature review [16]. The thermo-visco-plastic Johnson-Cook (JC) model [17] have been used in many numerical investigations focused on the modeling of the machining process [7,[18][19][20][21]. Its mathematical expression is given by Eq.…”

Kesici Takım Geometrisinin Ti-6Al-4V’nin İşlenmesi Sırasında Oluşan Tırtıklı Talaş Üzerindeki Etkisinin Sonlu Elemanlar Yöntemi ile Araştırılması

“…Yaich ve diğ. [20] sonlu eleman yöntemi kullanarak Ti-6Al-4V malzemenin dikey işlenmesinin birçok simülasyonu yapmışlardır ve adaptif örme tekniğinin (adaptive meshing techniques) ve sürtünmenin Lagrangian formülü ile beraber kullanılmasının sonlu eleman yönteminin doğruluğu için önemli olduğunu belirtmiştir.…”

“…Bu değer, Yaich ve diğ. [20] tarafından kullanılan 6 µm uzunluğuna yakındır ve simülasyon tahminlerinin doğru olduğunu göstermektedir.…”