BLASTWORTHINESS ANALYSIS OF AUXETIC PANEL ON HULL STRUCTURE OF COMBAT VEHICLE TO MEET STANAG 4569 LEVEL III STANDARD

• Main Author: Aji Wasesa, Haidar
• Format: Final Project
• Language: Indonesia
• Subjects: Teknik (Rekayasa, enjinering dan kegiatan berkaitan)
• Online Access: https://digilib.itb.ac.id/gdl/view/53852
• Institution: Institut Teknologi Bandung

APC Anoa is a combat vehicle currently mass-produced in Indonesia for military purposes. Anoa is an Armored Personnel Carrier (APC) type combat vehicle which functions to transport soldiers to the battlefield safely. The Anoa currently in production able to withstand the 7.62 mm caliber bullets fired by infantry. As for its blast resistance, APC Anoa has reached the STANAG 4569 level II standard. However, with a larger spectrum of threats, it is necessary to increase the level of protection in APC Anoa. Especially from bomb and mine threats. Research to increase the level of protection to STANAG 4569 level III has been done before. This research focuses on the use of additional sandwich panels with aluminum foam cores. However, there is no industry in Indonesia that can reliably supply aluminum foam needs. Alternatively, an auxetic structure can be used as the core of a sandwich panel. The auxetic material and structure itself has been in the spotlight to make it a ballistic armor, as well as a blast-proof structure. With their arrangement, auxetic materials can have high strength and resistance but still with a minimum weight. In doing this undergraduate assignment, the author wants to compare the energy absorption of sandwich panel specimens using aluminum foam cores with auxetic cores. The type of auxetic structure used in this study is the reentrant honeycomb open cell structure. The first stage is carried out to verify whether the modeling made is of good enough quality by conducting a numerical drop weight impact test. Similar testing is also carried out on foam core sandwich panels. From the modeling carried out in the first stage, it was found that in the wall thickness of 0.5 mm the auxetic core panel had an inferior total and specific energy absorption value compared to foam core. Then, the authors increased the thickness to 1 mm. Then do the drop weight impact test again. It was found that the total energy absorption by auxetic core specimens with a wall thickness of 1 mm was lower than that of foam. However, the 1 mm wall auxetic specimen had a higher specific energy absorption than the foam core specimen. v In the next stage, blast test was carried out referring to STANAG 4569 level III on foam core and auxetic specimens. As a comparison, the authors also modeled the blast test on a single plate. From these tests, it was found that the foam and auxetic core panels were able to significantly reduce deformation and acceleration due to blast in the APC Anoa passenger cabin compared to single plates. Auxetic core specimens at wall thicknesses of 0.5 mm and 1 mm have higher energy absorption values than foam cores. However, specimens with a wall thickness of 0.5 mm have a better absorption than 1 mm