Flexural Strength Analysis of Laminated Bamboo Slats (Bambusa Arundinacea) for Constructing a Small Fishing Boat Shells

Abstract

Because of the advantages of bamboo and the decreasing supply of teak, as a material for the construction of small Indonesian fishing boats, bamboo becomes an alternative substitute for teak as a common material to construct this type of boat. There are many bamboo species and populations in Indonesia which form the basis for selecting an advanced alternative material to construct fishing boats. This study discusses the mechanical properties of laminated bamboo slats, with a polyamide epoxy adhesive made by employing a manual cold press method. The type of bamboo used was the Bambusa Arundinacea variety that was greater than 3 years old. The bamboo laminate flexural strength was tested using the ASTM D 3043 Standard. The results of these tests revealed that the flexural strength of the laminated bamboo slats provided bending strengths of MOR and MOE values of 84.12 MPa and 18.04 GPa respectively. By using MOR and MOE values, and based on Bureau Classification of Indonesia (BKI), the shell thickness of 30 GT a fishing boat was calculated to be 25 -28 mm (bottom shell) and 19 -21 mm (side shell). These dimensions showed that the shell thickness can be reduced up to 33.3% when compared with teak (Tectona Grandis ) and the total volume of shell material to build a 30 GT of fishing boat, can be reduced by approximately 30%. The flexural strength of the bamboo slat laminate was shown to be 20% higher than 2nd class solid teak.

Analysis of Bamboo Species Variation Effect Against Physical and Mechanical Properties of Laminate Bamboo Slat for Fishing Boat Construction Materials

“…The most significant increase in width was found in B. Arudinacea at 4.1068%. However, this result was much smaller than previous studies [2]. The notable change in thickness also found in B. Arudinacea with change of 6,863%.…”

“…The notable change in thickness also found in B. Arudinacea with change of 6,863%. This thickness change is more significant than previous studies [2]; this phenomenon occurs because the young bamboo slats in the middle of the specimen do not withstand the increase in the thickness of the young slats. The increasing of bamboo weight occurs because the water is absorbed by the bamboo and makes them expand.…”

“…The development of research on laminated bamboo boats has been carried out by experts and researchers from Indonesia, where preliminary research was carried out on the use of laminated bamboo slats as a substitute for wood in the construction of frames, beams, and keel of wooden boat [1]. This research then examines if all wooden boat constructions can be replaced by laminated bamboo slats [2].…”

“…Bamboo plants on the Java Island have a considerable number and are relatively easy to harvest, and are cheaper than solid wood [5]. According to data survey in particular [2], it is known that the availability of Ori Bambusa arudinacea has a habitat of a 0-300 m above sea level. Furthermore, Dendro Calamus Asper can be found in highland areas (350-700 m above sea level).…”

Analisis Pemodelan Struktur Konstruksi Kapal Ikan Bambu Laminasi Kapasitas 20 GT

“…Rumus tersesebut digunakan apabila massa jenis material tidak sama dengan 0,56 g/cm 3 . Faktor pengali tersebut digunakan untuk menentukan lebar dari komponen konstruksi lunas dan linggi.…”