Scientific literature highlights that surface integrity of machined parts is notably affected by the flow stress characteristic of the workpiece. Typically, machining simulation models are tuned by identifying the friction model (tool-chip interaction), heat transfer model and tool geometry that match experimental outcomes. However, in this work the influence of the parameters defining material mechanical properties on simulation results is considered. A two-dimensional Finite Element Model has been developed based on the material Johnson–Cook constitutive law. Design of Experiment (DoE) procedure has then been used to analyze the response of the model in terms of predicted cutting forces and surface residual stresses to variations in mechanical properties such as the initial Yield strength, the strain-hardening coefficient, the instantaneous strain-rate sensitivity and the temperature dependence of the flow stress.

Sensitivity of Machining Simulation on Material Model Parameters / Atzeni, Eleonora; Carlone, V.; Ippolito, R.; Salmi, A.; Settineri, Luca. - STAMPA. - 1:(2009), pp. 115-122. (Intervento presentato al convegno 12th CIRP Conference on Modelling of Machining Operations tenutosi a Donostia-San Sebastián, Spain nel May 7-8, 2009).

Sensitivity of Machining Simulation on Material Model Parameters

ATZENI, ELEONORA;SETTINERI, Luca
2009

Abstract

Scientific literature highlights that surface integrity of machined parts is notably affected by the flow stress characteristic of the workpiece. Typically, machining simulation models are tuned by identifying the friction model (tool-chip interaction), heat transfer model and tool geometry that match experimental outcomes. However, in this work the influence of the parameters defining material mechanical properties on simulation results is considered. A two-dimensional Finite Element Model has been developed based on the material Johnson–Cook constitutive law. Design of Experiment (DoE) procedure has then been used to analyze the response of the model in terms of predicted cutting forces and surface residual stresses to variations in mechanical properties such as the initial Yield strength, the strain-hardening coefficient, the instantaneous strain-rate sensitivity and the temperature dependence of the flow stress.
2009
9788460808657
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2302823
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