Daniswara, Muhammad Fauzan Rivaldi (2025) Analisis Eksperimental Pengaruh Susunan Komponen Hybrid Tubular PLA Auxetic-Aluminum Sheet Crashbox dengan Topologi Auxetic Re-entrant Terhadap Kinerja Crashworthiness. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Crashbox adalah perangkat yang digunakan untuk menyerap energi tabrakan dan diletakkan pada area frontal tabrakan yang umumnya disisipkan di antara chassis dan bumper. Dalam implementasinya, dibutuhkan kemampuan menahan beban dan menyerap energi tabrakan sehingga tidak berdampak parah pada komponen yang dilindungi oleh crashbox. Dari beberapa penelitian yang ada, didapatkan celah potensi untuk meningkatkan kinerja crashworthiness model crashbox dengan desain tube hybrid antara polimer auxetic dengan material aluminum tube sheet. Penelitian ini bertujuan untuk mencari susunan komponen crashbox hybrid yang menghasilkan kinerja crashworthiness terbaik. Model spesimen yang digunakan berupa tubular dengan konfigurasi dua lapis antara polimer auxetic dengan aluminium sheet. Spesimen baseline yang diuji adalah baseline aluminum tube sheet (AL) dan baseline PLA re-entrant (RE), sedangkan untuk konfigurasi spesimen hybrid antara lain re-entrant-aluminum (RE-AL) dan aluminum-re-entrant (AL-RE). Pengujian pada penelitian ini menggunakan metode pengujian displacement controlled based compression quasi-static. Hasil pengujian akan diolah dianalisis untuk mengetahui kinerja crashworthiness yang meliputi initial peak force (IPF), specific energy absorption (SEA), mean crushing force (MCF), dan crushing force efficiency (CFE). Metode analisis perbandingan digunakan untuk mencari konfigurasi mana yang memiliki kinerja crashworthiness paling baik dibandingkan dengan material penyusunnya. Pada aspek IPF dan MCF, terdapat peningkatan signifikan antara spesimen hybrid dengan baseline penyusunnya. Peningkatan ini terjadi karena faktor pengeleman pada interface kedua material yang memberikan efek konstrain deformasi. Pada kriteria SEA dan CFE pada kedua konfigurasi spesimen hybrid, tidak menunjukkan adanya perbedaan mean signifikan terhadap mean baseline aluminum dan bisa dianggap practically insignificant. Konfigurasi RE-AL menunjukkan sedikit potensi peningkatan minor pada aspek SEA berdasarkan hasil uji Cohen’s d. Secara susunan spesimen hybrid, konfigurasi RE-AL memiliki peningkatan kinerja crashworthiness yang moderat pada kriteria IPF dan MCF, peningkatan tinggi pada kriteria SEA dibandingkan dengan AL-RE dan bisa dianggap practically significant. Namun, kedua spesimen memiliki mean CFE yang setara karena perbedannya sangat kecil.
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A crashbox is a device used to absorb crash energy and is placed in the frontal area of a collision generally inserted between the chassis and the bumper. In its implementation, it requires a large load-bearing and energy-absorbing capability to accommodate the effects of a crash so that it does not have a severe impact on the components protected by the crashbox. From several existing studies, there is a potential gap to improve the crashworthiness performance of the crashbox model with a hybrid tube design between auxetic polymer and aluminum tube sheet material. This research aims to find a hybrid crashbox component arrangement that produces the best crashworthiness performance. The specimen model used is tubular with a two-layer configuration between auxetic polymer and aluminum sheet. The variations tested were baseline aluminum tube sheet (AL) and baseline PLA re-entrant (RE), while the hybrid specimen configurations included re-entrant-aluminum (RE-AL) and aluminum-re-entrant (AL-RE). Testing in this study uses the displacement-controlled based quasi-static compression testing method. The test results will be analyzed to determine crashworthiness performance which includes initial peak force (IPF), specific energy absorption (SEA), mean crushing force (MCF), and crushing force efficiency (CFE). The comparative analysis method is used to find which configuration has the best crashworthiness performance compared to the constituent materials. In the IPF and MCF aspects, there is a significant improvement between the hybrid specimen and its constituent baseline. This improvement occurs due to the gluing factor at the interface of the two materials which provides a deformation constraint effect. In the SEA criteria for AL-RE and MCF in both hybrid specimen configurations, there is no significant mean difference to the mean of the aluminum baseline and can be considered practically insignificant. The RE-AL configuration showed a slight potential for minor improvement in the SEA aspect based on Cohen's d test results. In terms of hybrid specimen arrangement, the RE-AL configuration has moderate crashworthiness performance improvement in IPF and MCF criteria, high improvement in SEA criteria compared to AL-RE. However, both specimens have equivalent mean CFE as the difference is very small.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Aluminum Sheet, Auxetic, Crashworthiness, Crashbox, Re-entrant |
| Subjects: | T Technology > TL Motor vehicles. Aeronautics. Astronautics > TL257.5 Automobiles--Shock absorbers--Design and construction. |
| Divisions: | Faculty of Industrial Technology and Systems Engineering (INDSYS) > Mechanical Engineering > 21201-(S1) Undergraduate Thesis |
| Depositing User: | Muhammad Fauzan Rivaldi Daniswara |
| Date Deposited: | 04 Aug 2025 06:31 |
| Last Modified: | 04 Aug 2025 06:31 |
| URI: | http://repository.its.ac.id/id/eprint/126837 |
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