Sutekat, Aviciena Giovanni (2018) Studi Eksperimen dan Numerik Pengaruh Variasi Urutan Pengelasan Terhadap Distorsi Sudut Pada Struktur Panel Baja A36. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Luasnya penggunaan teknologi las karena prosesnya lebih sederhana sehingga biaya produksi menjadi lebih murah. Ada lima jenis sambungan dasar pada pengelasan yang biasa diterapkan dalam dunia fabrikasi. Kelima jenis sambungan pengelasan tersebut antara lain, butt joint, lap joint, T-joint, edge joint, dan corner joint. Sambungan tersebut memiliki karakteristik yang berbeda sesuai dengan kondisi material yang dikerjakan. Walaupun proses pengelasan terlihat sangat sederhana, tetapi faktanya banyak masalah yang harus diatasi. Seperti crack yang terjadi dikarenakan tegangan berlebih, distorsi yang terjadi dikarenakan kontraksi logam las selama pengelasan yang mendorong/menarik benda kerja dan sebagainya. Permasalahan yang akan ditinjau dalam tugas akhir ini adalah distorsi sudut akibat tegangan sisa. Tegangan sisa atau residual stress adalah tegangan yang terjadi akibat adanya gaya tarik dan tekan akibat terjadinya panas di daerah sekitar kampuh las yang tersebar secara tidak merata yang nantinya akan menimbulkan distorsi. Dalam tugas akhir ini dilakukan studi eksperimen dan numerik tentang pengaruh variasi urutan pengelasan terhadap distorsi sudut. Dengan dilaksanakannya kedua metode ini, diharapkan mendapatkan hasil variasi urutan pengelasan yang lebih efektif. Berdasarkan hasil dari validasi data eksperimen dan permodelan maka variasi urutan pengelasan loncat merupakan urutan pengelasan yang menghasilkan distorsi sudut yang paling minimum. ==================================================================================================================
The extent of the use of welding technology is because the process is simpler so that production costs become cheaper. There are five basic types of connections in welding that are commonly applied in the fabrication world. The five types of welding connections include butt joints, lap joints, T-joints, edge joints, and corner joints. The connection has different characteristics according to the condition of the material being worked on. Although the welding process looks very simple, but in fact there are many problems that must be overcome. Like cracks that occur due to overvoltage, distortions that occur due to weld metal contractions during welding that push / pull workpieces and so on. The problem that will be reviewed in this final project is angular distortion due to residual stress. Residual stress or residual stress is the stress that occurs due to tensile and compressive forces due to heat in the area around the weld seam that is spread unevenly which will cause distortion. In this final project an experimental and numerical study was carried out on the effect of variations in welding sequences on angular distortion. With the implementation of these two methods, it is expected to get a more effective variation in the welding sequence. Based on the results of experimental and modeling data validation, variations in jump welding sequences are welding sequences that produce the minimum minimum angle distortion.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Uncontrolled Keywords: | Panel baja A36, distorsi sudut, variasi urutan pengelasan, metode elemen hingga, elemen solid. |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA347 Finite Element Method T Technology > TS Manufactures > TS227 Welding. |
| Divisions: | Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38201-(S1) Undergraduate Thesis |
| Depositing User: | Aviciena G.S |
| Date Deposited: | 21 Jun 2021 10:41 |
| Last Modified: | 21 Jun 2021 10:41 |
| URI: | http://repository.its.ac.id/id/eprint/54458 |
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