STUDI PARAMETRIK KONFIGURASI METASTRUKTUR LOGAM BERBASIS OPEN CELL DENGAN PEMBEBANAN KOMPRESI UNTUK APLIKASI KENDARAAN TEMPUR

• Main Author: Hattami Kirana, Syifanggita
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/61985
• Institution: Institut Teknologi Bandung

The development of a lightweight structure technology has recently increased rapidly and become the alternative option to substitute the conventional structures. Some of the lightweight structures utilize lightweight cores such as beam-type metastructures, lattice structures, and auxetic structures. Furthermore, those structures can be applied in the sandwich panel’s core for the application as protection module such as floor protection in a combat vehicle. This research carries out several studies and simulations to obtain the optimum configuration of the beam-type metastructure subjected to a quasistatic compression loading. The compression loading is given to represent the energy absorbing mechanism in the unit cell’s simulation. The optimization was done by using the Taguchi method with L16’ orthogonal array. The L16’ is chosen because there are four control variables with four level variations. The optimum result is a metastructure made from stainless steel 304 with 1 mm curved beam thickness, 7 mm curved beam height, and 16 mm curved beam half-length. This configuration gives a 3.40 dB gain from the baseline design and improves the specific energy absorption value of 200.33 J/kg. The optimum metastructure configuration is then applied into a sandwich panel’s core with the arrangement of 10 × 10 × 4 cells. To fulfill the STANAG 4569 level 3b, the sandwich panel is simulated with blast load (ConWep method) with 8 kg TNT. From the simulation result, it is shown that there is no failure on the occupant side floor and the maximum displacement value of the occupant side floor is 7.11 cm, which considered as safe for the military personnel.