Investigation on induced-residual stress during end milling operation using analytical modelling

Sunday Joshua Ojolo, Adebayo Adeyemi Ogundare, Sikiru Oluwarotimi Ismail*, Oluwayemisi Toke Kofoworola

*Corresponding author for this work

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    During end milling operation, the residual stresses are developed from two sources: plastic deformation of workpiece material and thermal energy generated. These two sources of residual stresses are often combined as one toward prediction of the efficient combined milling parameters which consequently minimised the residual stresses induced in the material. Hence, a mathematical model for predicting the magnitude of induced-residual stresses during end milling of 304L stainless steel was formulated, using analytical approach. The formulated model captured both mechanical and thermal (thermo-mechanical) stresses, which play a significant role during material deformation prior to fracture. The model was simulated with MATLABTM software. The mill cutter has a nose radius of 0.4 mm and operated at a constant cutting speed of 3 m/min. The simulation results showed that when the depth of cut was increased from 0.1 mm to 0.4 mm, the resultant residual stress varied from 150 MPa to 500 MPa, respectively. Evidently, the value of the residual stress value recorded same in both xx and zz-directions, at a particular depth of cut. However, the residual stress decreased exponentially as it approached zero under the surface of the material. Therefore, this model is capable of predicting the residual stresses induced during end milling operation, depending on the material (workpiece) properties, tooling material and selected end milling parameters.

    Original languageEnglish
    Title of host publicationAdvances in Manufacturing Technology XXXII - Proceedings of the 16th International Conference on Manufacturing Research, ICMR 2018, incorporating the 33rd National Conference on Manufacturing Research
    EditorsKeith Case, Peter Thorvald
    PublisherIOS Press BV
    Pages39-44
    Number of pages6
    Volume8
    ISBN (Electronic)9781614994398
    DOIs
    Publication statusPublished - 13 Sep 2018
    Event16th International Conference on Manufacturing Research, ICMR 2018 - Skovde, Sweden
    Duration: 11 Sep 201813 Sep 2018

    Conference

    Conference16th International Conference on Manufacturing Research, ICMR 2018
    Country/TerritorySweden
    CitySkovde
    Period11/09/1813/09/18

    Keywords

    • 304L stainless steel
    • End milling
    • Residual stresses
    • Simulation
    • Thermo-mechanical stresses

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