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Engineering Mechanics Corporation of Columbus
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 Principal Engineer E-mail: djshim@emc-sq.com 614-459-3200 ext 257 |
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Education Ph.D., Sungkyunkwan University, Suwon, Korea Major: Mechanical Engineering M.S., Sungkyunkwan University, Suwon, Korea Major: Mechanical Engineering B.S., Sungkyunkwan University, Suwon, Korea Major: Mechanical Engineering Professional Interests
Professional Experiences Structural Integrity Assessment: Dr. Shim has been involved in various projects related to structural integrity assessment of piping (nuclear and gas) systems. He is an expert in application of numerous industry codes such as ASME Sec. XI, API 1104, API 579, R6, and SINTAP. Limit Load Analysis: Using 3-D finite element analysis and analytical solutions based on equilibrium stress fields, Dr. Shim has developed a "closed-form" limit load solutions for surface cracked pipes under various loadings including combined loading cases. These solutions consider crack orientation (axial & circumferential), crack location (internal & external) and also crack shape (semi-elliptical & constant depth). Estimation of Nonlinear Fracture Mechanics Parameter: Dr. Shim has devised an engineering scheme for estimating elastic-plastic fracture mechanics parameters for surface cracked plate under combined loading and for off-centered through-wall crack in a cylinder. This scheme is based on the reference stress method and can be easily applied for fracture assessments. Corrosion/Erosion Defect Assessment: Conducted stress analysis for wall-thinned nuclear piping. Dr. Shim has developed a method to estimate the failure strength of a wall-thinned pipe using reference stress method. He also was involved in a project that numerically estimated the burst pressure for corroded gas pipeline. Crack Growth Simulation Using Damage Mechanics: Dr. Shim has experience in numerical simulation of ductile crack growth using various damage models, e.g. Gurson-Tvergaard-Needleman (GTN) model, Computational Cell model. He also has simulated crack growth in functionally graded materials using cohesive zone modeling. Fracture Specimen Testing and Simulation: Performed various small-scale fracture tests including; tensile test, J-R test, CTOD test, SENT test for base metals and welds. Dr. Shim also has experience in coordinating and conducting a wide-plate specimen test. He numerically simulated most of these fracture tests. Other Research Experience From 2004 to 2006, Dr. Shim was a post-doctoral research associate at the University of Illinois (Urbana-Champaign). He conducted research on numerical modeling of linear and nonlinear fracture processes in advanced, metal-ceramic functionally graded materials (FGMs) using cohesive zone modeling. Professional Affiliations
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© 2008 Engineering Mechanics Corporation of Columbus, All Rights Reserved. |
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