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 (SHB) and the calibration of the Johnson–Cook (JC) constitutive model and Johnson–Cook (JC) damage–fracture model.
NOTE THAT CALIBRATING A FRACTURE MODEL, FOR INSTANCE, IS OFTEN MORE CHALLENGING THAN DEVELOPING IT. In this context, the detailed objectives of this short course are to equip participants with practical skills to verify and utilize SHB data based on recent scientific advances in SHB theory (see the Presenter page), to calibrate the JC constitutive model using deformation test results, and to calibrate the JC damage–fracture model using damage and fracture outcomes. Attendees will also be able to effectively apply the knowledge gained in this course to more complex constitutive and fracture models that will be extensively reviewed in this course.
The modeling results using quasistatic tests and SHB tests are essential for simulation-based design and analysis of large structural deformations, fractures, impacts, crashworthiness, high-speed machining, penetration, explosions, blasting, protective structures, and disaster prevention strategies.
As of January 21, the course notes titled "The Split Hopkinson Bar: New Theory, Calibration, and Applications," "Review and Calibration of Strain Rate-Dependent Constitutive Models," and "Classification, Review, and Calibration of Ductile Fracture Models" are in the process of being assigned ISBNs. Attendees of Day 1, Day 2, and Day 3, respectively, will receive these books free of charge.
As of January 13, the First Engineering Hall Auditorium has been confirmed as the venue for the course. A photograph is now available on the Venue page.
An International Poster Conference (IC-3MS) will be held during the short course nearby. See details below.
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. Don’t fall behind on the latest innovations in 3M for Simulation. Visit the Presenter page, Sections 12 and 13, to view examples.
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 JC damage–fracture model by incorporating the varying characteristics of triaxiality throughout the loading process.
* Fortran user subroutine programs for the JC constitutive model and JC damage–fracture model for major commercial FE codes.
* Other Excel templates for calibrating theJC constitutive model.
* Executable files for data intreval control and data interval syncronization.
* An SHB executable software per person for a specific MAC address.
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 software per person for a specific MAC address.
We expect that the executable software alone, linked to a MAC address, will demonstrate to attendees that the registration fee is justified.
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 postrer 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 a good platform for sharing ideas and cutting-edge knowledge.
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 Organizing Committee will select three to six abstracts from Short Course attendees for 15-minute oral presentations scheduled from 12:50 to 13:20.
To join theOrganizing 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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