ANALISIS PENGARUH TEBAL PELAT WELDING REPAIR PADA KEMUDI KAPAL (RUDDER) TERHADAP EFEKTIVITAS MANUVER KAPAL DENGAN

Ship maneuverability is the ability of the ship to rotate and change direction in all conditions of the water when the rudder (steering) turns to form a certain angle; there is a change in pressure, speed and direction of fluid flow, this causes changes in the course of the ship. Corals that produce the rudder of the vessel to crack or break because of the impact of the rock at that time the rudder needs a repair. Repair on the rudder of the ship is usually carried out on the leaves and sticks of steering, one of the repairs processes is by welding, but if the rudder undergoes a reparation process many times, it will cause changes in metallurgical material due to excessive heat treatment. In the process of repairing the rudder, the new plate used to improve the maximum is 1 mm with an old plate, and the rear side of the rudder experiences a higher load because in this part the flow distribution is stacked from the front of the rudder. The results of this study are repaired rudder experiencing an increase of 16% -18% drag and lift force, the faster the ship runs, the higher the drag and lift force so that the resistance is also greater Keywords: Rudder, Maneuver, Repair

Design of a storage mechanism designed for a railway vehicles producer

In this article the engineering design and strength analyses of a storage mechanism are presented. The handling device is intended to be placed in a warehouse and it will serve as a storage mechanism for longer metallurgical material in a railway vehicle manufacturing company. Stored material will be used for creation of some parts of railway wagons. It will allow to storage material in several levels in shelves. To meet requirements for manual control of the pull-out mechanism it will be necessary to design a pull-out mechanism with the sufficiently large transmission ratio in order to handle a shelf block weighing up to given load. Consequently, there are conducted the numeric strength analysis of steel construction which has to safely carry the total load of ten shelves.

Computer Application for Metallurgical Material Field

At present the design of metallurgical engineering materials research largely also depends on the facts and experience accumulation. As a modern tools, computers increasingly play a huge role in today's world of various fields, it has penetrated into every subject areas and daily lifewhich become the symbol of modernization. In material field, computer is also gradually become extremely important tool. It is one of the important reasons that the application of computer in material science makes materials science rapid development .