Guest seminar by Prof. Shaochuan Feng: Digital fabrication: understanding the underlying mechanisms of advanced Production processes through numerical simulation

Invited by Prof. Dr. Y.T. Pei

Abstract

Advanced production processes offer the potential to create intricate parts with high precision, quality, and performance. However, these processes often involve complex multi- physics coupling behaviors that are difficult to clearly understand through experimental methods alone. As a crucial component of digital fabrication, numerical simulation provides a new perspective to uncover the underlying mechanisms behind advanced production processes. In this presentation, four study cases using different simulation methods and techniques are introduced to illustrate the modeling processes and results: a) finite element method (FEM) and computational fluid dynamics (CFD) were used with a two-step modeling strategy to develop a heat transfer model and a flow model, simulating the forming process of recast humps during laser grooving; b) in hybrid laser-waterjet machining, temperature history and material removal under water-laser interactions were predicted by programming with finite difference method (FDM); c) by combining discrete element method (DEM), CFD, and FEM, a coupling model was created to reveal the essential reasons of shape deviations and down-facing surface defects of laser powder bed fused overhang structures; d) through a CFD model, the heat and mass transfer process of cooling water in a conformal cooling mold was simulated and the optimal Reynolds number was suggested.

Bio

Dr. Shaochuan Feng is currently an associate professor at the University of Science and Technology Beijing (USTB), China. He received his PhD degree from Shandong University, China in 2018. During his PhD studies, he was jointly trained at the University of New South Wales (UNSW) in Australia from 2016 to 2017. In 2019-2021, he conducted research on laser additive manufacturing as a post-doctoral researcher at the University of Groningen, working in collaboration with Prof. Yutao Pei. Dr. Feng's research interests mainly focus on laser materials processing technologies, additive manufacturing of metals, numerical simulation for advanced production processes, and machine learning oriented to digital fabrication. Dr. Feng is a senior member of the Chinese Mechanical Engineering Society. He has been appointed as a Young Scientists Committee Member of Advanced Powder Materials since October 2022 and a Guest Editor of Applied Sciences for the special issue Advances in Additive Manufacturing and Laser Processing 2023.