FEM modeling of hard turning with consideration of viscoplastic asymmetry and phase transformation

• Autorzy: Uhlmann E. , Mahnken R. , Ivanov I. M. , Cheng C.
• Języki publikacji: EN

Abstrakty

EN

A material model for strain rate and temperature dependent asymmetric plastic behavior accompanied by phase transformation induced plasticity (TRIP) as an important phenomenon in steel production and machining processes was developed. To this end the well-known Johnson-Cook flow stress model has been extended by the concept of weighting functions considering the asymmetric plastic material behavior under tensile, compressive and torsion load. Furthermore, the extended Johnson-Cook model has been combined with the Leblond approach regarding the ductility increase by transformation induced plasticity occurring during hard turning of AISI 52100. On the basis of the theoretical approach for calculating the flow stress with consideration of the viscoplastic asymmetry, a material routine for the FEM-software DEFORM has been implemented. The material and friction model coefficients have been determined in accordance with force and surface temperature measurements during hard turning of AISI 52100. The model takes the phase transformations between martensite and austenite and the influence of externally applied stress on the austenite start temperature into account.

Słowa kluczowe

EN

hard turning; finite element method; production technology; process optimization

• Wydawca: Wydawnictwo Wrocławskiej Rady FSNT NOT
• Czasopismo: Journal of Machine Engineering
• Rocznik: 2013
• Tom: Vol. 13, No. 1
• Strony: 80--92
• Opis fizyczny: Bibliogr. 15 poz., tab., rys.

Twórcy

autor

Uhlmann E.

• Institute of Machine Tools and Factory Management, Technical University Berlin, Germany

autor

Mahnken R.

• Chair of Technical Mechanics, University of Paderborn, Germany

autor

Ivanov I. M.

• Institute of Machine Tools and Factory Management, Technical University Berlin, Germany

autor

Cheng C.

• Chair of Technical Mechanics, University of Paderborn, Germany

Bibliografia

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