Pratiwi, Sintya Meira (2026) Aplikasi Komposit Kulit Kayu Galam (Melaleuca Leucadendra) Untuk Crashworthiness Struktur Crash Box. Doctoral thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Tiga konfigurasi struktur dikembangkan, yaitu horizontal honeycomb dengan trigger (CH1), horizontal honeycomb tanpa trigger (CH2), dan vertical honeycomb tanpa trigger (CH3), serta Base Model tanpa pengisi. Model terpilih kemudian dimanufaktur dan diuji secara quasi-static pada kecepatan penekanan 10 mm/menit. Mekanisme kegagalan komposit pascadeformasi dianalisis menggunakan Scanning Electron Microscopy.
Hasil simulasi menunjukkan bahwa CH3 dengan komposisi 65% serat dan 35% epoksi menghasilkan EA tertinggi sebesar 5,97 kJ atau meningkat 159,57% dibandingkan Base Model, tetapi disertai IPF yang relatif tinggi. Berdasarkan keseimbangan antara penyerapan energi dan gaya puncak, CH1 dengan komposisi 60% serat dan 40% epoksi dipilih sebagai konfigurasi paling optimal. Hasil pengujian quasi-static menunjukkan bahwa CH1 meningkatkan EA dari 2,15 menjadi 3,11 kJ, SEA dari 13,78 menjadi 15,39 kJ/kg, dan MCF dari 22,87 menjadi 33,08 kN, serta menurunkan IPF dari 23,67 menjadi 12,84 kN. Dengan demikian, struktur horizontal honeycomb berbasis komposit kulit kayu galam dengan trigger berpotensi digunakan sebagai penyerap energi ringan dan berkelanjutan pada struktur crash box kendaraan.
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Three structural configurations were developed: a horizontal honeycomb with a trigger (CH1), a horizontal honeycomb without a trigger (CH2), and a vertical honeycomb without a trigger (CH3), as well as a base model without filler. The selected models were then manufactured and tested under quasi-static loading at a compression rate of 10 mm/minute. The failure mechanism of the composite after deformation was analyzed using scanning electron microscopy.
Simulation results showed that CH3, with a composition of 65% fiber and 35% epoxy, produced the highest energy absorption (EA) of 5.97 kJ—a 159.57% increase compared to the Base Model—but was accompanied by a relatively high peak stress (IPF). Based on the balance between energy absorption and peak stress, CH1, with a composition of 60% fiber and 40% epoxy, was selected as the most optimal configuration. Quasi-static test results show that CH1 increases EA from 2.15 to 3.11 kJ, SEA from 13.78 to 15.39 kJ/kg, and MCF from 22.87 to 33.08 kN, while reducing IPF from 23.67 to 12.84 kN. Thus, the horizontal honeycomb structure based on galam wood veneer composites with a trigger has the potential to be used as a lightweight and sustainable energy absorber in vehicle crash box structures.
| Item Type: | Thesis (Doctoral) |
|---|---|
| Uncontrolled Keywords: | aluminium 6061-T6, crash box, crashworthiness, kulit kayu galam, komposit honeycomb, penyerapan energi, trigger, 6061-T6 aluminium, crash box, crashworthiness, energy absorption, galam bark, honeycomb composite, trigger. |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA418.9 Composite materials. Laminated materials. |
| Divisions: | Faculty of Industrial Technology and Systems Engineering (INDSYS) > Mechanical Engineering > 21001-(S3) PhD Thesis |
| Depositing User: | Sintya Meira Pratiwi |
| Date Deposited: | 06 Aug 2026 12:15 |
| Last Modified: | 06 Aug 2026 12:53 |
| URI: | http://repository.its.ac.id/id/eprint/143579 |
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