DESIGN OF BLAST PROTECTION STRUCTURE USING AUXETIC RE-ENTRANT HONEYCOMB CORE FOR MILITARY VEHICLE
The explosive landmine is the biggest threat to the military vehicle on the battlefield. The most used landmine type in a conflict zone is called Improvised Explosion Device, often referred to as IED. This device is used to attack military vehicles while on the road. But in an actual war zone, this...
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| Format: | Theses |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/53279 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | The explosive landmine is the biggest threat to the military vehicle on the battlefield. The most used landmine type in a conflict zone is called Improvised Explosion Device, often referred to as IED. This device is used to attack military vehicles while on the road. But in an actual war zone, this device often injured nonmilitary personnel such as civilians, medical units, and peace workers. On the battlefield, landmine protection of military fighting vehicles is an urgent necessity to protect occupants inside from injury due to explosion. Therefore, many types of effective protective structures were developed to minimize injury to vehicle personnel. The case of the threat for the vehicle was when an explosive device explodes under the occupant's cabin or known as an underbelly explosion. The blast energy from an explosive device is typically absorbed by the structure of the vehicle in the form of deformation. The more energy absorbed by the structure, the better the chance of the structure to reduce occupant injury. The idea to absorb more blast energy and to provide better protection for the personnel is by installing a sacrificial structure under the vehicle. For this case, auxetic material has good potential to use as an energy absorber. Therefore, this study aims to improve the existing V-shaped protection structure by using auxetic re-entrant honeycomb as core and optimize the auxetic configuration. The optimization variables are gap length (L2), height (H), the angel of auxetic (?), and thickness of auxetic cell (t). The purpose of this optimization is to minimize the deformation in the vehicle floor and maximize the specific energy absorption of the protection structure. This optimization uses artificial neural networks, genetic algorithms, multi-objective optimization, and TOPSIS methods. The new configuration of auxetic from optimization results can reduce the deformation on the floor by 12.5 % and increase specific energy absorption by 5.6 %.
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