Basic Study on the Joints of Wooden Ship

Abstract

In order to obtain basic data on the strength of wooden ship, the strength of timber is investigated taking into consideration of micro-structure in wood.At first, a large number of fine copper wires are gathered together and soldered into a circular cylinder. These models (57 pieces all) are tested in compression, and shows very much close resembrance to the compression failure of wood. It is explained that the mode of failure is governed by the binding strength of each elements.Then, hollow rectangular tubes made up of paper laminates (vellum paper type B, 80 1b) are gathered together and cemented by Cemedine C (232 pieces total). These models are tested in tension, compression and bending, and compared to wood. It is shown that the compressive strength, the surface compression phenomenon, the relation between compessive strength and the orientation of fibers, stress distribution on the section in bending, and mode of failure are all simulated very well.In short, these simulated models show very close resembrance to wood, and contribute very much toward the analysis of the strength of wood.