ANALISIS GREEN DENSITY AKIBAT PENGARUH VARIASI TEKANAN PADA PROSES KOMPAKSI SERBUK Cu-Sn10% MENGGUNAKAN DISCRETE ELEMENT METHOD

Burhanuddin, Muhammad (2020) ANALISIS GREEN DENSITY AKIBAT PENGARUH VARIASI TEKANAN PADA PROSES KOMPAKSI SERBUK Cu-Sn10% MENGGUNAKAN DISCRETE ELEMENT METHOD. Undergraduate thesis, Insititut Teknologi Sepuluh Nopember.

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Abstract

ABSTRAK Frangible bullet di Indonesia dikembangkan oleh workshop yang berada di bawah naungan Departemen Teknik Material dan Metalurgi ITS, produk tersebut diproduksi menggunakan metode metalurgi serbuk konvensional. Kondisi terkini, produk memiliki kecacatan dimana mengalami deformasi atau hancur saat akan dimasukkan ke dalam selongsong peluru. Hipotesa penyebab kondisi tersebut adalah heterogenitas densitas peluru setelah melalui proses kompaksi serbuk. Dalam penelitian ini metode elemen diskrit digunakan untuk memprediksi distribusi densitas pada proses kompaksi serbuk Cu-Sn10%, dengan variasi tekanan yaitu 500, 700, dan 900 Psi. Variasi tersebut diterapkan pada dua geometri peluru yaitu flat nose dan full round. Dari penelitian ini didapatkan hasil distribusi bulk relative density pada green compact frangible bullet. Terdapat pola yang berulang pada seluruh variasi, dimana area yang dekat dengan sumber tekanan memiliki densitas bulk relatif yang lebih tinggi daripada daerah yang jauh dari sumber tekanan. Hal ini menunjukkan bahwa area yang dekat dengan sumber tekanan merupakan daerah yang paling tangguh pada geometri tersebut. Dari penelitian ini juga didapatkan hubungan yang berbanding lurus antara tekanan terhadap bulk density, dimana bulk density terendah terjadi pada tekanan 500 Psi pada geometri full round yaitu senilai 1614,21 kg/m3, sedangkan nilai bulk density tertinggi terjadi pada tekanan 900 Psi pada geometri full round dengan nilai 1952,608 kg/m3. Dari kedua kesimpulan tersebut, kesimpulan terkait fenomena deformasi pada frangible bullet saat akan dipasang pada selongsong peluru tidak diakibatkan oleh distribusi densitas yang heterogen, namun lebih mengarah pada densitas bulk (green density) yang tidak memenuhi spesifikasi frangible bullet layak tembak. ========================================================= ABSTRACT Frangible bullet in Indonesia was developed by a workshop supervised by Material and Metallurgy Department of ITS, the product manufactured using conventional powder metallurgy methods. Current conditions about these products that the bullets start to deformed or destroyed when being put into a cartridge case. The hypothesis that causes this condition pointed to the heterogeneity of the bullet density after through the powder compacting process. In this study, discrete element method used to predict the density distribution in the compacting process of Cu-Sn10% powder, using pressure variation of 500, 700, and 900 Psi. This variation applied to both of frangible bullet geometries, that is flat nose and full round. This study obtained the bulk relative density distribution in green compact of frangible bullet. There is recurring pattern for all variations, whereas the area close to the pressure source has a higher density than the area that far from the pressure source. This patterns shows that the area close to the pressure source was the most toughness area in the geometry. From this study also obtained a relationship between bulk density due to applied pressure, There is direct relation on both. The lowest bulk density occurs at pressure of 500 Psi on a full round geometry that’s obtained 1614,21 kg / m3, while the highest bulk density occur at pressure of 900 Psi on full round geometry with 1952,608 kg / m3. From these two conclusions, the deformation phenomenon of frangible bullet’s when it assembled on the cartridge shell isn’t caused by heterogeneous density distribution, but rather caused by bulk density (green density) that’s not in range of required density of shootable frangible bullet.

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: Frangible Bullet, Kompaksi Serbuk, Distribusi Bulk Relative Density, Metode Elemen Diskrit, Frangible bullet, Powder Compacting, Bulk Relative Density Distribution, Discrete Element Method
Subjects: T Technology > TJ Mechanical engineering and machinery
T Technology > TS Manufactures > TS171 Product design
Divisions: Faculty of Industrial Technology and Systems Engineering (INDSYS) > Mechanical Engineering > 21201-(S1) Undergraduate Thesis
Depositing User: Muhammad Burhanuddin
Date Deposited: 21 Aug 2020 03:48
Last Modified: 21 Aug 2020 03:48
URI: https://repository.its.ac.id/id/eprint/79391

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