The Split Hopkinson Bar and
Calibration of the Johnson-Cook Constitutive and Damage-Fracture Models
February 4 - 6, 2026
Gangneung, South Korea
Presented by Prof. Hyunho Shin, Gangneung-Wonju National University
Hosted by Dyn Tech Inc., in Gangneung, South Korea
Supported by Gangneung-Wonju National University, South Korea
This short course is designed to equip professional engineers, researchers, and postgraduate students with practical knowledge in Mechanical Material Modeling for Simulation—specifically focusing on the split Hopkinson bar and the calibration of the Johnson-Cook constitutive model and Johnson-Cook damage fracture model.
The course includes exercises on modeling the mechanical properties of materials for simulations involving design and analysis of large structural deformations, fractures, impact, crashworthiness, high-speed machining, penetration, explosions, blasting, protective structures, and disaster prevention strategies.
An International Poster Conference (IC-3MS) will be held during the short course nearby. See details below.
Effective October 18, 2025, a new registration fee policy applies to prevent emergency in managing the Short Course depending on attendee numbers. Please refer to the registration page.
As of October 12, 2025, Google Analytics reports more than 1,000 active researchers on this website. A similar number of researchers who couldn't access this website likely referred to the course description materials attached to the email. Over 2,000 researchers have visited this website or reviewed the course materials. Join the core of this cutting-edge knowledge forum!
As of September 7, 2025, there are already enough attendees, so this short course will not be canceled.
In this short course, we provide virtual or ground-truth experimental data, then practice processing the data and discuss related theories. Equipment handling and laboratory data acquisition are not included.
The software developed by the presenter will be freely distributed to attendees in its latest version.
* Two types of open-source solvers for the Pochhammer-Chree equation: one designed for n = 1 and another capable of handling up to n = 20.
* An iterative dispersion correction program written in MATLAB, available as open-source software.
* An Excel Macro program for the strain rate equation.
* An Excel template designed to calibrate the Johnson-Cook fracture model by incorporating the varying characteristics of triaxiality throughout the loading process.
* Other Excel templates for calibrating the Johnson-Cook constitutive and fracture models.
Most of the course will cover metal materials using J2 plasticity theory based on von-Mises yield criterion, while discussing ceramics, concrete, rocks, soil, rubber, and polymers within a feasible scope during the Q&A session.
The scope of this short course on the Split Hopkinson Bar includes both the Split Hopkinson Pressure Bar and the Split Hopkinson Tension Bar. The Split Hopkinson Torsion Bar is excluded.
Please bring a notebook with Excel installed, as laptops will not be provided for this short course. We believe that achieving results using Excel demonstrates a true understanding of the calibration process. It is preferable to maximize what can be accomplished with Excel while minimizing reliance on more advanced optimization tools, which should be used only after fully comprehending the calibration process established through Excel. If MATLAB is also installed, attendees will find the exercises on related topics more engaging and beneficial.
The course includes the presentation of results obtained using commercial software, such as finite element (FE) packages and MATLAB, but does not cover the methods for operating the software itself. This topic is addressed in classes offered by authorized training agencies affiliated with the software companies.
The course fee includes printed handouts, lunch, coffee, tea, and snacks. Attendees will receive Excel macro programs, MATLAB scripts, executable files, and Excel templates developed by the presenter as gifts from the Short Course, including one executable program per person for a specific MAC address.
The First International Conference on Mechanical Material Modeling and Simulation (IC-3MS)—Deformation and Fracture up to High Strain Rates—will be held in conjunction with the nearby Short Course.
Attendees of this Short Course can register the IC-3MS free of charge. Individuals registered only for IC-3MS cannot access this Short Course.
Presenting a poster in the IC-3MS is optional for Short Course attendees and not mandatory.
Short Course attendees may submit abstracts exceeding 100 words, up to a maximum length of one page, to IC-3MS.
The IC-3MS will publish an Abstract Book in PDF format with an e-ISBN. It will be available publicly on ResearchGate.
Most Short Course attendees will present posters. The conference steering committee will select three to six abstracts from Short Course attendees for 15-minute oral presentations scheduled from 12:50 to 13:20.
The presenter is not required to be present by the poster at a specific time. Attendees and presenters often gather around posters during coffee breaks and lunch, making them an ideal platform for sharing ideas and cutting-edge knowledge.
To join the Steering Committee of the IC-3MS, email Mr. James Lee (dyntech@outlook.kr) your intention along with a brief self-introduction (approximately 40 words).
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