Astuti, Fina Andika Frida and Prof. Dr. Eng. Moch Agus Choiron, S.T., M.T and Prof. Dr. Eng. Anindito Purnowidodo, S.T.,M. Eng and Dr. Eng. Yudy Surya Irawan, S.T., M.Eng (2025) Penyerapan Energi dan Pola Deformasi Honeycomb Filled Hybrid Tube Crash Box. Doktor thesis, Universitas Brawijaya.
Abstract
Salah satu struktur penyerap energi pada mobil untuk mengurangi tingkat keparahan kecelakaan adalah crash box. Desain crash box dikembangkan dengan tujuan untuk meningkatkan kinerja penyerapan energi akibat tabrakan kendaraan. Secara umum, efek penyerapan energi dari crash box terkait erat dengan bentuk, material dan proses manufaktur crash box. Perkembangan bentuk dan desain penampang crash box banyak terinspirasi dari alam, salah satunya adalah struktur desain sarang lebah (honeycomb). Rekayasa desain crash box umumnya menggunakan material logam. Seiring perkembangan kemampuan manufaktur 3D printing maka material PLA dengan basis carbon memiliki peluang sebagai bahan alternatif hybrid crash box. Pada studi ini crash box di desain dengan menggabungkan circular tube dan honeycomb sebagai struktur pengisi sehingga menjadi honeycomb hybrid crash box. Material yang digunakan yaitu aluminium untuk circular tube dan filamen PLA carbon untuk honeycomb tube. Variasi struktur pengisi honeycomb yang digunakan adalah sudut honeycomb, panjang sisi honeycomb, dan tebal honeycomb sehingga dapat diketahui pola deformasi, karakteristik penyerapan energi dan desain yang optimal honeycomb filled hybrid crash box. Untuk mendapatkan desain yang optimal dilakukan optimasi desain dengan Response Surface Methodology (RSM). Hasil penelitian menunjukan honeycomb hybrid crash box menghasilkan pola deformasi axisymmetric mode. Hal ini disebabkan circular tube berbahan aluminium memiliki plastisitas yang baik sehingga mampu menahan gaya tekan. Struktur honeycomb berbahan PLA carbon sebagai struktur pengisi bersifat ringan tetapi kuat sehingga mampu menahan gaya tekan secara merata. Material PLA carbon yang memiliki duktilitas rendah dan bersifat getas tidak menggangu pola deformasi plastis dinding luar tetapi membantu kestabilan dinding luar dengan menjadi filler. Penyerapan energi honeycomb hybrid crash box melebihi penjumlahan penyerapan energi dari struktur penyusunnya
English Abstract
One of the energy-absorbing structures in a car to reduce the severity of an accident is a crash box. The crash box design was developed with the aim of improving the performance of energy absorption due to vehicle collisions. In general, the energy absorption effect of a crash box is closely related to the shape, material and manufacturing process of the crash box. The development of the shape and design of the crash box crosssection is largely inspired by nature, one of which is the honeycomb design structure. Crash box design engineering generally uses metal materials. Along with the development of 3D printing manufacturing capabilities, PLA material with a carbon base has the potential as an alternative material for hybrid crash boxes. In this study, the crash box is designed by combining a circular tube and honeycomb as a filler structure to become a honeycomb hybrid crash box. The materials used are aluminum for the circular tube and PLA carbon filament for the honeycomb tube. The variations in the honeycomb filler structure used are the honeycomb angle, honeycomb side length, and honeycomb thickness so that the deformation pattern, energy absorption characteristics and optimal design of the honeycomb filled hybrid crash box can be known. To obtain an optimal design, design optimization is carried out using the Response Surface Methodology (RSM). The results of the study show that the honeycomb hybrid crash box produces an axisymmetric mode deformation pattern. This is because the circular tube made of aluminum has good plasticity so that it can withstand compressive forces. The honeycomb structure made of PLA carbon as a filler structure is light but strong so that it can withstand compressive forces evenly. PLA carbon material which has low ductility and is brittle does not interfere with the plastic deformation pattern of the outer wall but helps the stability of the outer wall by becoming a filler. The energy absorption of the honeycomb hybrid crash box exceeds the sum of the energy absorption of its constituent structures.
| Item Type: | Thesis (Doktor) |
|---|---|
| Identification Number: | 0625070002 |
| Uncontrolled Keywords: | crash box, honeycomb, hybrid, 3D printing, PLA carbon.crash box, honeycomb, hybrid, 3D printing, PLA carbon |
| Divisions: | S2/S3 > Doktor Teknik Mesin, Fakultas Teknik |
| Depositing User: | Sugeng Moelyono |
| Date Deposited: | 17 Feb 2025 02:35 |
| Last Modified: | 17 Feb 2025 02:35 |
| URI: | http://repository.ub.ac.id/id/eprint/236830 |
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