Arifuddin, Andi Mursid Nugraha
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Journal : International Journal of Metacentre

Experimental Test of Tensile Strength of Barge Deck Plate Welded Joints Alamsyah; Indah Sari, Fitria; Arifuddin, Andi Mursid Nugraha; Pawara, Muhammad Uswah; Mubarak, Azhar Aras; Hijriah
International Journal of Metacentre Vol. 2 No. 2 (2022): December 2022
Publisher : Naval Architecture Departement, Hasanuddin University

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Abstract

American Standard Testing and Material (ASTM) A36 is a low carbon steel, and commonly used as material of shipbuilding. Joining of steel can cause decreasing of its strength. The purpose of this study was to determine the tensile strength of joints of ASTM A36, consisting of square butt, single bevel butt, and single vee butt joints. The  research methode is experimental.  The specimens are made of steel for the ship's decks, which are connected using three types of joints. Each type of connection involves as many as three specimens, so there are a total of nine specimens. Before the tensile test is carried out, the specimen is subjected to a penetrant test to detect weld defects. It was detected that the specimen had broken off at the weld joint. The experiment result shows that the strongest joint from tensile strength point of view is single vee butt joint (198.80 MPa), followed by single bevel butt joint (182.19 MPa) and, square butt joint (168.51 MPa).
Application of Tensile Testing on Ulin Wood And Bungur Wood as Main Materials for 20 GT Traditional Fishing Vessel Hull Arifuddin, Andi Mursid Nugraha; Alamsyah; Burliyanto, Decky; Suardi
International Journal of Metacentre Vol. 3 No. 1 (2023): June 2023
Publisher : Naval Architecture Departement, Hasanuddin University

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Abstract

Fishing boats in North Penajam Paser are made by combining 2 types of wood in the hull. This combination of wood types is carried out to save the material procurement budget. Bungur wood is the alternative choice for shipyards for hull material combined with Ulin wood. For this reason, this paper shows the differences in the tensile strength performance of these 2 types of traditional wooden ship hull materials. The experimental method of destructive testing of the type of Tensile test was applied in this study. Where the experimental results show that the tensile strength of the crepe is 22% lower than the tensile strength of ulin wood. Meanwhile, in terms of stiffness, crepe wood is superior to ulin wood, where the difference reaches 22.22%. Bungur wood still has the potential to be used for wooden ships with an LoA (length over all) value of <15 meters or for ships that have a lower hydrostatic load than that which can be accepted by Bungur wood.