PERANCANGAN DAN PENGUJIAN CRASHWORTHINESS DENGAN VARIASI TABUNG HONEYCOMB MENGGUNAKAN MATERIAL POLYLACTIC ACID (PLA)

DAFFA TSAKIF AUNIL HAQ, . (2026) PERANCANGAN DAN PENGUJIAN CRASHWORTHINESS DENGAN VARIASI TABUNG HONEYCOMB MENGGUNAKAN MATERIAL POLYLACTIC ACID (PLA). Sarjana thesis, UNIVERSITAS NEGERI JAKARTA.

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Abstract

Tujuan dari penelitian ini adalah merancang, menguji, dan menganalisis peforma dari struktur crashworthiness menggunakan material polylactic acid (PLA) dengan variasi honeycomb sebagai komponen penyerapan energi untuk aplikasi keselamatan dalam kendaraan. Hal ini dilatar belakangi tingginya tingkat kematian akibat kecelakaan mobil serta pemanfaatan teknologi 3D printing yang marak digunakan. Penelitian bertujuan untuk mengetahui ketahanan struktur terhadap pengujian tekan serta menganalisis karakteristik penyerapan energi setiap variasi desain. Penelitian mencakup desain lima varian tabung honeycomb yang dicetak menggunakan teknologi cetak 3D berbahan PLA+. Pengujian menggunakan mesin uji tekan dengan kecepatan tekan 10 mm/min dan batas deformasi 70% dari tinggi awal spesimen. Perhitungan Specific Energy Absorption (SEA), Mean Crushing Load (MCL), dan Crushing Force Efficiency (CFE) dianalisis untuk data hasil pengujian pada setiap desain. Data diolah menggunakan tabel hasil perhitungan untuk setiap desain. Hasil penelitian menunjukkan bahwa pembuatan spesimen sudah hampir sesuai dengan harapan dan nilai EA, SEA, MCL dan CFE dipengaruhi oleh variasi struktur yang berupa volume, massa, dan luas penampang dari spesimen. Variabel lain yang dapat mempengaruhi hasil nilai penyerapan energi adalah design dari struktur spesimen. ***** The primary objective of this study is to design, evaluate, and characterize the crashworthiness performance of honeycomb-based structural components fabricated from Polylactic Acid (PLA) using additive manufacturing. The motivation for this research stems from the increasing fatality rates associated with automotive collisions and the widespread adoption of 3D printing technology in engineering applications. The investigation focuses on assessing the compressive resistance of the structures and quantifying their energy absorption capabilities across different geometric configurations. Five honeycomb tubular variants were designed and manufactured using PLA+ filaments through fused filament fabrication. Quasi-static compression tests were conducted using a universal testing machine at a cross-head speed of 10 mm/min with a deformation limit equivalent to 70% of the initial spesimen height. The crashworthiness metrics, including Specific Energy Absorption (SEA), Mean Crushing Load (MCL), and Crushing Force Efficiency (CFE), were computed and analyzed for each configuration. The experimental results were processed and presented in tabulated form for comparison. The results demonstrate that the fabrication process produced spesimens with geometry sufficiently close to the intended design, enabling reliable evaluation of crashworthiness behavior. The values of EA, SEA, MCL, and CFE exhibited sensitivity to geometric variations, specifically in terms of spesimen volume, mass, and cross-sectional area. Furthermore, the findings indicate that structural topology plays a significant role in influencing energy absorption performance.

Item Type:	Thesis (Sarjana)
Additional Information:	1). Dr. Ahmad Kholil, M.T. ; 2). Dr. Eng. I Wayan Sugita, M.T.
Subjects:	Teknologi dan Ilmu Terapan > Teknik Mesin, Mekanika Teknik Teknologi dan Ilmu Terapan > Manufaktur
Divisions:	FT > S1 Teknik Mesin
Depositing User:	Daffa Tsakif Aunil Haq .
Date Deposited:	30 Jan 2026 03:28
Last Modified:	30 Jan 2026 03:28
URI:	http://repository.unj.ac.id/id/eprint/64465

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