Analisis Nominal Stress Dan Hot Spot Stress Fillet Welded Joint Pada Struktur Alas Kapal Menggunakan Metode Elemen Hingga

Saputro, Muhammad Yusuf Edo (2025) Analisis Nominal Stress Dan Hot Spot Stress Fillet Welded Joint Pada Struktur Alas Kapal Menggunakan Metode Elemen Hingga. Other thesis, Institut Teknologi Sepuluh Nopember.

Text 5018211085-Undergraduate_Thesis.pdf - Accepted Version Restricted to Repository staff only Download (4MB) | Request a copy

Abstract

Las pada struktur alas kapal berperan penting dalam menjamin kekuatan dan keamanan struktur. Salah satu bagian krusial adalah sambungan fillet welded joint yang dapat mengalami tegangan akibat proses pengelasan. Penelitian ini bertujuan untuk menganalisis pengaruh variasi bentuk fillet weld (datar, cekung, dan cembung) terhadap nilai nominal stress dan hot spot stress pada pelat alas berpenegar menggunakan metode elemen hingga (finite element method). Pemodelan dilakukan secara 3D dengan analisis termal dan struktural pada software simulasi elemen hingga. Variasi heat input dihitung berdasarkan parameter pengelasan Shielded Metal Arc Welding (SMAW), kemudian dilakukan konversi nilai temperatur menjadi beban untuk analisis tegangan. Hasil menunjukkan bahwa masing-masing variasi las menghasilkan distribusi panas, tegangan, dan deformasi yang berbeda. Hasil simulasi menunjukkan bahwa masing-masing variasi model las menghasilkan nilai temperatur, tegangan tarik, dan deformasi yang berbeda. Variasi model A menghasilkan temperatur maksimum sebesar 543,25 °C, tegangan tarik maksimum 80,718 MPa, dan deformasi maksimum 0,018 mm. Variasi model B menunjukkan temperatur tertinggi sebesar 530,29 °C, dengan tegangan tarik maksimum 72,247 MPa dan deformasi maksimum 0,015 mm. Sementara itu, variasi model C mencatat temperatur tertinggi 569,79 °C, tegangan tarik maksimum 76,891 MPa, dan deformasi maksimum 0,017 mm. Berdasarkan kombinasi nilai-nilai tersebut, model B paling efektif untuk aplikasi fillet welded joint karena memiliki nilai tegangan tarik yang relatif kecil dan deformasi yang sangat minimal.
========================================================================================================================
The weld on a ship’s bottom structure is crucial role to ensure the strength and safety of the structure. One critical component is the fillet welded joint, which may experience stress due to the welding process. This study aims to analyze the effect of fillet weld shape variations (flat, concave, and convex) on nominal stress and hot spot stress in a stiffened bottom plate using the finite element analysis (FEA). A 3D model was developed, incorporating thermal and structural analyses in finite element simulation software. Heat input variations were calculated based on Shielded Metal Arc Welding (SMAW) parameters, followed by temperature-to-load conversion for stress analysis. The results indicate that each weld variation produces distinct heat distribution, stress, and deformation patterns. The simulations reveal that each weld model variation yields different temperature, tensile stress, and deformation values. Model A recorded a maximum temperature of 543,25°C, a maximum tensile stress of 80,718 MPa, and a maximum deformation of 0,018 mm. Model B exhibited the highest temperature at 530,29°C, with a maximum tensile stress of 72,247 MPa and a maximum deformation of 0,015 mm. Meanwhile, Model C reached a peak temperature of 569,79°C, a maximum tensile stress of 76,891 MPa, and a maximum deformation of 0,017 mm. Based on these combined results, Model B is the most effective for fillet welded joint applications due to its relatively low tensile stress and minimal deformation.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	pelat alas berpenegar, fillet welded joint, metode elemen hingga, nominal stress, hot spot stress, dan deformasi.
Subjects:	V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering
Divisions:	Faculty of Marine Technology (MARTECH) > Naval Architecture and Shipbuilding Engineering > 36201-(S1) Undergraduate Thesis
Depositing User:	Muhammad Yusuf Edo Saputro
Date Deposited:	04 Aug 2025 08:09
Last Modified:	04 Aug 2025 08:09
URI:	http://repository.its.ac.id/id/eprint/126075

Actions (login required)

View Item