Authors: Paramasivan Kalvettukaran; Sandip Das; Sundar Marimuthu; Dipten Misra
Addresses: School of Laser Science and Engineering, Jadavpur University, Kolkata 700032, India ' Department of Mechanical Engineering, Jadavpur University, Kolkata 700032, India ' The Manufacturing Technology Centre, Coventry CV7 9JU, UK ' School of Laser Science and Engineering, Jadavpur University, Kolkata 700032, India
Abstract: This paper describes numerical simulation of laser processing of AISI 304 sheet metal and statistical analysis to develop mathematical relations for determination of the limiting values of the process parameters such that the material temperature remains above or below the specified maximum temperature, depending upon the specific requirement. The simulations layout is designed based on a central composite design (CCD) with four factors and five levels. The simulations are carried out through finite element package COMSOL MULTIPHYSICS®. Based on the simulation output, a regression equation is developed to estimate the maximum temperature as a function of the laser process parameters and sheet thickness. Once the regression equation is obtained, the same is recast to obtain limiting values of process parameters that may be applied such that the maximum temperature exceeds or remains below a specified maximum temperature or the melting temperature of the specimen.
Keywords: laser material processing; numerical simulation; regression equation; solidus temperature; liquidus temperature.
International Journal of Computational Materials Science and Surface Engineering, 2020 Vol.9 No.1, pp.1 - 21
Received: 19 Sep 2018
Accepted: 24 Sep 2019
Published online: 26 May 2020 *