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Stress Engineer Computational Mechanics Structural Analyst Geotechnical Researcher Simulation SpecialistExperienced Engineer passionate about applying Finite Element Methods to solve geophysical and engineering problems. Expert in developing analytical and numerical solutions and using commercial software for static analysis, vibration frequency, mode, predicting dynamic stress, and multiphase flow. I help companies optimize product designs and gain customer trust.Key SkillsFinite Element Analysis (FEA) Computational Fluid Dynamics (CFD) Discrete Element Method (DEM) Material Point Method (MPM) Smoothed Particle Hydrology (SPH) Unix Numerical Analysis Modeling and Simulations Structural Analysis Stress Analysis Thermal dynamics C++ FORTRAN Java Python MATLAB ANSYS (Workbench, APDL, FLUENT, Space Claim) FEMAP/NASTRAN/PATRAN ABAQUS Rocky DEM EDEM Autodesk 360 Fusion 3D CAD: Autodesk Inventor Solid Works Creo Space Claim Hypermesh Hyperworks OptStruct CATIA V5 Metals Laminated Composite Design OptimizationProfessional ExperienceME ELECMETAL Inc. Minneapolis, MNPrincipal Mechanical Engineer PHONE NUMBER AVAILABLEDeveloped numerical methods for particle trajectory simulation using DEM in crusher, SAG, AG, Ball, and Rod mills. Created FEA models of mill liner castings to analyze bolting, contact, and operational stresses. Root cause study on liner fracture and fatigue life analysis. Led design optimization projects by coordinating with marketing and manufacturing. Developed 2-way coupling between DEM and CFD analysis for slurry effects in SAG mills.Analyzed results from modeling simulations which identified design flaws and defects to be redesigned, resulting in improved performance of key products.Simulate slurry flow through SAG mills using Ansys Fluent.Applied Nastran for excavator bucket PC2000 static loading analysis and fatigue analysis.Developed new liners of composite material using rubber, ceramics and cast alloy.Educated sales personnel and customers on product design flaws and corrections to eliminate misunderstandings about the product design quality, which resulted in greater customer retention.Selected by senior management to create and present in technical sessions at international conferences.ME ELECMETAL Inc. Minneapolis, MNSenior Engineer PHONE NUMBER AVAILABLEDeveloped structural optimization methodology for grinding mills to improve throughput, energy efficiency, and extended liner wear life. Created a simulation scheme for analyzing SAG mill liner breakage and validated algorithms for modeling wear history. Develop analytical solutions and simple hand calculation for model verification and calibration.Created a complete set of approaches to evaluate the discharge efficiency of the product, which resulted in a more comprehensive and accurate view of the proposed design.Simulated dynamic stress on grinding mill shell liners for the root cause of premature failure using Ansys Workbench.Developed a set simulation scheme to optimize mill operation conditions, including grinding media charge level, ore charge level, mill rotation speed, and discharge flow rate. This helped clients gain energy and material efficiencies, product output, and increased profitability.Analyzed the impact on ladle using free-body diagram Derived analytical solution for grinding ball impact on shell liners.Metso Minerals, Colorado Springs, COSimulation Specialist PHONE NUMBER AVAILABLEDeveloped advanced simulation program that combines CFD with DEM for wet grinding process in which water and fine particles were explicitly included. Calculate mill power draw, and ore particle collision energy for rock breakage model.Developed numerical analysis tools, including discrete element method, material point method, and control volume method for simulating solid-liquid interactions, thus providing a high-fidelity simulation tool for the mineral processing industry.Validated the simulation code and applied the new method to a vertical-mill blade optimization.Failure analysis of blast-resistant window panel design made of polycarbonate composite.Optimized laminated composite structure design using FEA.Made code for simulating laser drilling that involves multi-physics including heat transfer and melt flow. The research result got published in Journal of Thermal Sciences.Stress analysis on pre-stressed fuel tank subject to laser-beam heating using FEM.Stress analysis for Bomber H6D airframe using FEM and the landing gear weight drop test.EducationDoctor of Philosophy, Structural Engineering - University of Missouri-ColumbiaMaster of Science, Mechanical and Aerospace Engineering- Peking UniversityBachelor of Science, Physics and Seismology - Peking UniversitySelected PublicationsCandidate's Name , Modeling Charge Motion in an Industrial SAG Mill Using DEM and SPH Coupling Simulations at Society for Mining, Metallurgy & Exploration  Feb 28, 2023Candidate's Name , Amit Saxena, Quantifying SAG Mill Liner Survivability and Wear Life at Canadian Institute of Mining, Metallurgy and Petroleum May 3rd, 2022.Candidate's Name , Pengtao Sun, Zhen Chen, 2017, Simulation of multiphase interaction using the combined DEM-MPM, Commun. Comput. Phys. Vol. 21, No. 5, pp. 1258-1281Candidate's Name , Zhen Chen, Yuwen Zhang, 2016, Melt flow and heat transfer in laser drilling, International Journal of Thermal Sciences, Vol. 107 pp. 141-152