A Study of Alternative Materials for Sail Mast of Sandeq

Sandeq is a type of outrigger sailing boat used by Mandar fishermen to catch fish as well as a mode of transportation between islands. Sandeq boat has a mast made of bamboo that is called pattung. Recently, the raw material for the mast is very rare, so it is necessary to find alternative materials with equal quality and strength. In this study, numerical simulations were carried out by modeling masts made of aluminum, fiberglass and bamboo using Finite Element Method (FEM). The workload used is the maximum load of the main sail. The results showed that alternative materials that can replace bamboo are aluminum 6061 (AL 6061) and fiberglass (FRP). By applying the caseload on the Sandeq mast, it is found that the AL 6061 experiences stress with 78 MPa, and FRP experiences stress with 150 MPa. Both of these materials are suitable for use as an alternative material for the Sandeq mast with a safety factor SF ≥ 5.