Sangjoon "Jay" Sohn

Sangjoon "Jay" Sohn, Ph.D., P.E.

Senior Consultant

Dr.  Sangjoon "Jay" Sohn's areas of expertise include applied mechanics, fatigue analysis, and fracture mechanics (both ambient temperature and high temperature), with strong emphasis on numerical analysis utilizing the finite element method. With over 10 years of industrial experience in the analysis of mechanical components with leading manufacturers and engineering firms, Dr. Sohn provides subject matter expert level competency in modeling and solving contact and highly non-linear problems via finite element analysis (FEA).

Some of the examples of his work include design and analysis of pipelines, flow control equipment for oil and gas industry, pressure vessels, threaded, and non-threaded connections. In addition to the design and analysis engineering work examples listed above, he has had successful experience in material degradation assessment and residual life prediction of mechanical components of power plants, petrochemical facilities, and refineries.

Dr. Sohn is currently a member of ASME and ASTM. In the past, he has held the position of Chapter President of the South Texas Chapter for Korean American Scientists and Engineers Association.


  • Merging ASME and API Design Methods for Subsea Equipment Up to 25,000 PSI Working Pressure, OTC Publication, January 2012
  • Measurement of power-law creep parameters by instrumented indentation methods, Journal of the Mechanics and Physics of Solids, January 2012
  • On the Measurement of Creep by Nanoindentation with Continuous Stiffness Techniques, MRS Proceeding, January 2011
  • A Study of Indentation Creep Using the Finite Element Method, Doctoral Dissertation, The University of Tennessee, January 2007
  • Assessment of Material Degradation Using the Grain-Boundary Etching Method, Master's Degree Thesis, Chung-Ang Univesity, January 1999

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430 Technology Parkway NW Peachtree Corners, GA 30092
  • Phone: (678) 990-3280
  • Fax: (678) 990-3285

Areas of Expertise

ESi's expertise spans dozens of industries and specializations organized across several practice groups, each staffed by dozens of in-house experts with the technical knowledge, hands-on expertise, and courtroom experience required to execute projects for and with our clients from start to finish.

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