MULTIFRACTAL MODELLING AND SIMULATION OF SHRAPNEL FRAGMENTATION PATTERNS FROM EXPLOSIVES
Ayad Abas Hasan College of media/ The Islamic university in Najaf, Iraq
Zainab Failh Al_Lami Department of education/ Al-Manara College For Medical Sciences/ (Maysan)/ Iraq
Heba muhammad Hussein Department of Accounting , Al-Zahrawi University College, Karbala, Iraq
Noor Karim College of education, Al-Farahidi University, Baghdad/ Iraq
Fanar Hussien Nasser Al-Esraa University College, Baghdad, Iraq
Ghadban Abdullah Kalaf Department of Accounting , Mazaya university college/ Iraq.
Maki Mahdi Abdulhasan Department of Medical Laboratories Technology, AL-Nisour University College, Baghdad/ Iraq
Hawraa Ali Sabah College of Technical Engineering, National University of Science and Technology, Dhi Qar, 64001, Iraq
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Abstract This study focuses on multifractal modelling and simulation of shrapnel fragmentation patterns from explosives. Therefore, in this research study, different numerical methods are considered for modelling fragments and blast, which are generated from detonation of explosive. These methods are applied to different scenarios in which explosive devices are improvised within confined spaces. A burn method was used for modelling the detonation of explosives with condensed phase within a 3D multi material flow solver. Initially, an explosion is simulated within a “cylindrical tube and the fluid solver” is validated for a blast which is partially confined. Later on, the explosions were simulated on a subway for C4 charges of 30kg and 10kg. The maximum pulse as well as the overpressure within the shock, are utilized for predicting the risk of the blast injuries. In order to improvise the threats due to explosives, C4 charges were modelled with disk, cylindrical and spherical shapes, surrounded by a spherical fragments layer. It has been observed that charge shape of the explosive plays an essential role in spherical fragments acceleration. Thus, this study has also been beneficial in providing different theoretical as well as practical implications.
Keywords
Fragments, Shock Waves, Explosives, Fluid dynamics, Detonation, Particles, |