THREE DIMENSIONAL ANALYTICAL AND FINITE ELEMENT METHODS FOR SIMULATING A MOVING MELT POOL WITH MASS ADDITION
Laser Direct Metal Deposition, alloying and similar additive processes are recognised as difficult to model because of the complicated mass and heat flow. This paper compares analytical and finite element approaches via a case study of the coaxial laser direct metal deposition of Inconel 718. The analytical models used are based on superposition of the quasi-stationary temperature fields of multiple moving heat sources, modified to account for the incoming mass. The finite element models used are based on element birth methods and utilize the anisotropic enhanced thermal conductivity method. The simulations are compared with experimentally results and results show that both methods can predict depth more accurately than width. The analytical method generally underestimates width and the finite element method overestimates it. The model inaccuracies can be explained in part by considering the increased effective conductivity within the melt pool.
Andrew J. Pinkerton Alhaji M. Kamara Kamran Shah Shakeel Safdar Lin Li
Laser Processing Research Centre, School of Mechanical Aerospace and Civil Engineering, The Universi Department of Aerospace Engineering, College of Aeronautical Engineering, National University of Sci
国际会议
第三届太平洋国际激光与光学应用会议(PICALO 2008)
北京
英文
369-374
2008-04-16（万方平台首次上网日期，不代表论文的发表时间）