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Computational Methods: indispensable tools for engineering analysis and design

Prof G. R. Liu
Prof G. R. Liu

Date: Fri 8 Mar 2019, 12:00 - 14:00

Location: Seminar Room, SEMS, QMUL

Abstract. This talk provide an overview of computational methods and its applications to the analysis and design of engineering systems. The focus will be on general formulations of meshfree and element-based methods established using strong, week and weakened weak (W2) formulations. Studies on the comparisons of W2 formulations with the strong and weak formulations will be presented. We will present a family of W2 models known as S-PIM and S-FEM developed in the recent years. Properties of this class of methods important for automations in computation will be discussed including, spatial and temporal stability and convergence, softening effects induced by various types of smoothing domains, upper bound properties leading to certified solutions real-time computational models, and insensitivity to the quality of mesh allowing effective uses of triangular/tetrahedral meshes, which are best suited for adaptive analyses. For CFD problems, the gradient smoothing methods (GSM) will be briefly introduced. Application examples will also be presented for simulating engineered material behavior at various extreme situations, fluid structural interaction problems (helicopter blades interacting with subsonic airflows, flying birds, etc.), cracks in engineering aerospace structural systems, crystal plasticity for metallic polycrystalline used in jet engines, integrity assessment of systems via inverse analysis with real-time computation., and additive manufacturing processes.

Keywords. FEM, meshfree, S-FEM, S-PIM, GSM, CFD, FSI, numerical methds, modeling and simulation, weakened weak formulation

Bio. Dr. Liu received PhD from Tohoku University, Japan in 1991. He was a PDF at Northwestern University, USA from 1991-1993. He is currently a Professor and Ohio Eminent Scholar (State Endowed Chair) at the University of Cincinnati. He authored a large number of journal papers and books including two bestsellers: “Mesh Free Method: moving beyond the finite element method” and “Smoothed Particle Hydrodynamics: a Meshfree Particle Methods.” He is the Editor-in-Chief of the International Journal of Computational Methods, Associate Editor of IPSE and MANO. He is the recipient of numerous awards, including the Singapore Defence Technology Prize, NUS Outstanding University Researcher Award and Best Teacher Award, APACM Computational Mechanics Awards, JSME Computational Mechanics Awards, ASME Ted Belytschko Applied Mechanics Award, and Zienkiewicz Medal from APACM. He is listed as a world top 1% most influential scientist (Highly Cited Researchers) by Thomson Reuters in 2014-2016, 2018. ISI citations by others:~14000. ISI H-index:~68; Google Scholar H-Index: 94.

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