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All Journal IPTEK The Journal for Technology and Science Zona Laut : Jurnal Inovasi Sains dan Teknologi Kelautan
Ahmad Basuki Widodo
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Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Energy Engineering Transportation

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Application of Laminated Veneer Lumber (LVL) on the Wooden Boat Construction Ahmad Basuki Widodo
IPTEK The Journal for Technology and Science Vol 23, No 1 (2012)
Publisher : IPTEK, LPPM, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20882033.v23i1.14

Abstract

LVL (Laminated-Veneer Lumber) has many advantages and economic values, which is important for wooden boat construction. The recovery of veneer, the main material of LVL, are higher than sawn-timber and their drying process are faster. LVL produced with a continuous press has been approved as an engineered material with reliable strength and stiffness. In a wooden boat processing, the easy forming into a curve shape and strength are main factor, because of the streamline shape of boats. LVL material is able to meet those requirements. As an endless-length LVL is made from a log limited-length hence LVL always contain joints. Butt joint have numerous drawbacks, but they are inherently simple and less time to manufacture than other joints types. The purposes of this experiment are to investigate the basic characteristics of LVL which are important for deck and hull planking in the wooden boat constructions. Yellow meranti and red meranti were peeled by a veneer lathe and phenol formaldehyde adhesive were used. Result of experiment indicated that at the position 0o (β), the flexibility and strength of LVL up to proportional limit increased with increasing number of layer and spacing of butt-joint (d/t). LVL at the position 45o and 90o (β), all types of LVL had lower flexibility and strength than the standard value for deck and hull planking. In bending experiment test speciment at position 45° with direction of grain, maximum width of LVL equal to the spacing of frame and at position 90° equal to the width of hull planking in wooden boat. Based on the interpretations of the above results, it can be concluded that (1). LVL of 9, 6 and 4 plies with upside (inside) veneer butt-joint is appropriate for deck and hull planking in wooden boat manufacturing, (2). LVL of 9, 6 and 4 plies with spacing of butt-joint (d/t) more than 20 is appropriate for deck and hull planking in manufacturing wooden boat.
DISTRIBUSI TEGANGAN SAMBUNGAN LAS TERHADAP SUDUT SAMBUNGAN PELAT BADAN KAPAL DENGAN PEMODELAN METODE ELEMEN HINGGA Nugroho, Nur Yanu; Pramana Putra, Irvan; Widodo, Ahmad Basuki
Zona Laut : Jurnal Inovasi Sains Dan Teknologi Kelautan Volume 6, Number 2, July 2025 Edition
Publisher : Departemen Teknik Kelautan Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62012/zl.vi.36304

Abstract

Welding is the process of joining 2 metals using a heat process. Ship repair is a ship care and maintenance activity that is planned periodically in accordance with the requirements of the classification body. It is not uncommon for a shipbuilding industry to carry out replating procedures that do not comply with the regulations of the classification body. It is often found in the replating process that plate joints have angles of less than 90°. This research explores the effect of the cutting angle of ship hull plates on the stress distribution in welded joints of ship hull plates using the finite element method with Solidworks simulation software using ASTM A36 material, taking angles of 30°, 40°, 50°, 60°, 70°, 90°. Based on the test results using Solidworks, we can see that the minimum stress results are at a 30o angle variation with a value of 92.6 N/mm2, and the maximum value is at a 90o angle with a value of 281 N/mm2. With several variations of these angles, those that meet BKI standards are the 80o angle and the 90o angle, each of which has a yield strength value that meets the standards set by the classification. To ensure the safety and durability of the ship's plate, it is recommended that the plate be cut at an 80° or 90° angle. These corners not only meet BKI standards but also demonstrate a more stable and even stress distribution, reducing the risk of material failure.
Co-Authors Nugroho, Nur Yanu Pramana Putra, Irvan