Eventos Anais de eventos
MECSOL 2022
8th International Symposium on Solid Mechanics
Evaluation of Friction at the Chip-Tool Interface in Orthogonal Cutting by Mechanistic Models applied to Limit Analysis
Submission Author:
Fabio da Costa Figueiredo , RJ
Co-Authors:
Luísa de Amorim Makhoul Gomes , Adriane Mougo, Lívia Nogueira, Fabio da Costa Figueiredo
Presenter: Luísa de Amorim Makhoul Gomes
doi://10.26678/ABCM.MECSOL2022.MSL22-0058
Abstract
The use of superduplex is recurrent in the oil industry due to its high mechanical strength and corrosion resistance, in which equipment are submitted to high pressures and temperatures and flowing of corrosive fluids. Superduplex steels presents low machining skills and special tools are required, in addition to being a high value material. Thus, the experimentally evaluation of cutting forces of such materials is also expensive and time consuming. In cutting forces evaluation, friction at chip-tool interface plays an important role. In this work, the friction coefficient of Superduplex is determined from AISI 316 and AISI 410 steels because they are low cost and they simulate the Superduplex microstructure. This Superduplex friction coefficient is obtained from calibration of a mechanistic model using data from the other steels. Later, this friction coefficient is used in a limit analysis model in order to obtain numerical cutting forces. Limit analysis aims the determination of a collapse power in a permanent regime configuration, determined by Merchant model. In this limit analysis formulation, friction dissipation is considered supposing knowing chip-tool contact length. The tool is considered as a rigid body and the workpiece is a deformable one. This workpiece is dicretized in finite elements and plane strain hypothesis is considered. Then, the aim of this work is to compare experimental and numerical cutting forces, determined by limit analysis theory. The obtained experimental and numerical results are close. Moreover, tangential and normal stresses at chip-tool interface are determined.
Keywords
Orthogonal cutting, friction, Mechanistic model, limit analysis
