Seoul National University · Engineering
Professor Beom-Seon Jang's research lab specializes in advanced structural mechanics and materials engineering, with a focus on the dynamic response and failure mechanisms of marine and offshore structures under extreme loading conditions such as slamming, fire, and geotechnical penetration. The lab develops innovative numerical simulation techniques—particularly using advanced finite element methods like LS-Dyna with MMALE and thermal elasto-plastic analysis—for predicting structural behavior, welding deformation, and soil-structure interaction in complex environments. Research also emphasizes lightweight structural design, such as I-Core sandwich panels, and the optimization of passive fire protection systems to balance safety, cost, and construction efficiency.
Figures are computed from collected data and may differ slightly.
In the present study, the existing equivalent stain method is improved to make up for its weaknesses. The improved inherent strain model is built considering more sophisticated three dimensional constraints which are embodied by six cubic elements attached on three sides of a core cubic element. From a few case studies, it is found that the inherent strain is mainly affected by the changes in restraints induced by changes of temperature-dependent material properties of the restraining elements.
Marine structures are subjected to slamming loads characterised by high hydrodynamic pressure within short time durations. Such loads can cause local and global damages to structures. This paper, which is Part I in a series, reports a numerical investigation of slamming loads acting on flat stiffened plates and their dynamic response. The nonlinear explicit finite element code LS-Dyna with the Multi-Material Arbitrary Lagrangian-Eulerian (MMALE) solver was adopted to simulate the slamming impact
The use of I-Core sandwich panel has increased in cruise ship deck structure since it can provide similar bending strength with conventional stiffened plate while keeping lighter weight and lower web height. However, due to its thin plate thickness, i.e. about 4~6 mm at most, it is assembled by high power CO2 laser welding to minimize the welding deformation. This research proposes a volumetric heat source model for T-joint of the I-Core sandwich panel and a method to use shell element model for
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