Nugroho, Muhammad Satrio Tuhu (2019) Studi Numerik dan Eksperimen Pengaruh Urutan Pengelasan Terhadap Distorsi Sudut pada Penel Baja ASTM A36 dengan Pengelasan FCAW (Flux Core Arc Welding). Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Baja umumnya digunakan sebagai bahan untuk bangunan laut terapung seperti kapal dan bangunan pengeboran minyak lepas pantai. Pada fabrikasi bangunan laut tersebut digunakan pengelasan untuk menyambungkan baja yang merupakan material utama dalam konstruksinya. Proses pengelasan yang umum digunakan pada fabrikasi bangunan laut adalah FCAW (Flux Core Arc Welding). Hal tersebut karena FCAW cocok untuk pengelasan semua posisi dan berbagai konfigurasi. Namun pada pengelasan kerap ditemui cacat las seperti distorsi sudut. Distorsi sudut disebabkan regangan termal antara logam las dan logam induk yang menghasilkan tegangan sehingga menyebabkan gaya dalam. Kontrol distorsi sudut yang dapat dilakukan adalah dengan memilih urutan pengelasan yang tepat. Pada penelitian Tugas Akhir ini, dilakukan analisis numerik dan eksperimen pengaruh urutan pengelasan terhadap distorsi sudut pada panel baja ASTM A36 dengan pengelasan FCAW. Dari hasil penelitian diketahui bahwa variasi urutan pengelasan 2 secara simetri menghasilkan rata-rata distorsi sudut yang terkecil dikarenakan temperatur puncak yang lebih rendah dibandingkan variasi urutan pengelasan 1 secara lurus dan variasi urutan pengelasan 3 secara loncat. Selain itu, adanya stiffener yang besimpangan juga memperkecil distrosi sudut.============================================================================================================
Steel is common material used in floating marine buildings such as ships and offshore oil rig. In fabrication of marine building, welding is used to connect steel which is the main material in its construction. The welding process commonly used in fabricating marine buildings is FCAW (Flux Core Arc Welding). This is because FCAW is suitable for welding all positions and various configurations. However, in welding often finds welding defects such as angular distortion. Angular distortion is caused by thermal strain between weld metal and parent metal which produces a stress which causes an internal force. Control of angular distortion that can be done is to choose the right welding sequence. In this Final Project research, numerical and experimental study is used to know the welding sequences effect on angular distortion in ASTM A36 steel panels with FCAW welding. From the results of study it is known that the variation of welding sequence 2 by symmetry produces smallest average angular distortion due to lower peak temperatures compared to the variation of welding sequence 1 in a straight manner and the variation of welding sequence 3 by jump. In addition, intersection of stiffener also minimizes angular distortion.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Numerical Analysis, Experimental, FCAW (Flux Core Arc Welding), Welding Sequence, Angular Distortion |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA347 Finite Element Method T Technology > TA Engineering (General). Civil engineering (General) > TA492.W4 Welded joints T Technology > TN Mining engineering. Metallurgy > TN752.I5 Steel--Heat treatment T Technology > TN Mining engineering. Metallurgy > TN879.6 Welding T Technology > TS Manufactures > TS227 Welding. |
| Divisions: | Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38201-(S1) Undergraduate Thesis |
| Depositing User: | Muhammad Satrio Tuhu Nugroho |
| Date Deposited: | 24 Jun 2024 06:27 |
| Last Modified: | 24 Jun 2024 06:27 |
| URI: | http://repository.its.ac.id/id/eprint/68514 |
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