ANALISIS PENGUJIAN QUASI- STATIC AXIAL LOAD PADA STRUKTUR LEADING EDGE BERBAHAN POLYCARBONATE 3D PRINTING UNTUK EVALUASI ABSORPSI ENERGI

Perancangan struktur yang memiliki kelaiktabrakan merupakan faktor
penting dalam meningkatkan keselamatan penerbangan, khususnya pada bagian
leading edge pesawat yang rawan terhadap benturan, seperti bird strike. Penelitian
ini difokuskan pada kajian karakteristik penyerapan energi serta pola deformasi dari
struktur leading edge pesawat dengan konfigurasi auxetic berbahan polycarbonate
yang diproduksi melalui teknologi 3D printing. Pengujian dilakukan secara
eksperimental dengan metode quasi-static axial load guna merepresentasikan
beban aksial saat terjadinya tabrakan. Hasil pengujian memperlihatkan bahwa
struktur auxetic mampu menyerap energi secara efektif dan menampilkan pola
deformasi khas, seperti concertina, diamond, serta buckling. Selain itu, struktur ini
terbukti mampu mendistribusikan beban secara lebih merata, menurunkan
konsentrasi tegangan, dan meningkatkan efisiensi penyerapan energi material. Oleh
karena itu, penggunaan desain auxetic berbasis polycarbonate dapat
dipertimbangkan sebagai solusi inovatif untuk meningkatkan crashworthiness pada
struktur airframe pesawat.
Kata kunci: crashworthiness, auxetic structure, polycarbonate, 3D printing,
energy absorption, axial compression, quasi-static test.
=======================================================
The design of crashworthy structures is an important factor in improving
aviation safety, particularly in the leading edge of aircraft, which is prone to
collisions such as bird strikes. This study focuses on examining the energy
absorption characteristics and deformation patterns of aircraft leading edge
structures with auxetic configurations made of polycarbonate produced using 3D
printing technology. Experimental testing was conducted using a quasi-static axial
load method to simulate the axial load during a collision. The test results showed
that the auxetic structure effectively absorbs energy and exhibits characteristic
deformation patterns, such as concertina, diamond, and buckling. Additionally, this
structure was found to distribute loads more evenly, reduce stress concentration,
and enhance material energy absorption efficiency. Therefore, the use of auxetic
designs based on polycarbonate can be considered as an innovative solution to
enhance crashworthiness in aircraft airframe structures.
Keywords: crashworthiness, auxetic structure, polycarbonate, 3D printing, energy
absorption, axial compression, quasi-static test.