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2 Bulletin of the Polish Academy of Sciences. Technical Sciences

2 2013

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Numerical study for determination of pulse shaping design variables in SHPB apparatus

Baranowski P., Malachowski J., Gieleta R., Damaziak K., Mazurkiewicz L., Kolodziejczyk D.

Bulletin of the Polish Academy of Sciences. Technical Sciences

2013

Vol. 61, nr 2

459--466

High strain rate experimental tests are essential in a development process of materials under strongly dynamic conditions. For such a dynamic loading the Split Hopkinson Pressure Bar (SHPB) has been widely used to investigate dynamic behaviour of various materials. It was found that for different materials various shapes of a generated wave are desired. This paper presents a parametric study of Split Hopkinson Pressure Bar in order to find striker’s design variables, which influence the pulse peak shape in the incident bar. With experimental data given it was possible to verify the developed numerical model, which was used for presented investigations. Dynamic numerical simulations were performed using explicit LS-Dyna code with a quasi-optimization process carried out using LS-Opt software in order to find striker’s design variables, which influence the pulse peak shape.

Load carrying capacity numerical study of I-beam pillar structure with blast protective panel

Mazurkiewicz L., Kolodziejczyk D., Damaziak K., Malachowski J., Klasztorny M., Baranowski P.

Bulletin of the Polish Academy of Sciences. Technical Sciences

2013

Vol. 61, nr 2

451--457

The paper presents numerical analyses aimed at preliminary assessment of the protective panel effectiveness, which task is to protect the elements of building structures against explosion. For the criterion of assessing the effectiveness of the panel the load capacity of the column made of steel I-beam was chosen. Ultimate force was determined by using advanced computational procedure, which consisted of four stages: preload, blast simulation, dynamic response and static analysis of deformed structure. Blast load was simulated using Lagrangian- Eulerian domain coupling. Results indicated that the application of the protective panel significantly reduces the plastic deformation of the structure.