ship construction 7th edition pdf free download

Potentially a very clean and economical composites manufacturing method, the process draws resin into a dry reinforcement on an evacuated vacuum bagged tool using only the partial vacuum to drive the resin. The process is known by several acronyms-in this paper it is referred to as RIFT (Resin Infusion under Flexible Tooling). It is the final area on which this paper concentrates.RIFT is a variant of vacuum-driven RTM in which one of the solid tool faces is replaced by a flexible polymeric film.

Styrene emissions can be reduced by the development of: resin systems with low styrene emission improved ventilation and air filtering systems closed moulding techniques. Increasing legislation to limit styrene emissions (mainly from polyester resin systems) into the work place has been the key factor in promoting new technology in the manufacture of fibre reinforced plastics composites.

Finally, some results are shown from the partial modelling of a real ship that was used for testing and validation of the system.

The modelling concepts and methodology are discussed and the architecture of the system is presented, describing the main components. For the intended purpose, the ease and speed of generation of a model is much more relevant than a high geometric accuracy, and so it was adopted as a simplified geometric modelling, representing curved shapes with polygonal approximations. The objective of the system is to generate and help to evaluate alternative structural configurations, producing information on total or partial weights and centres of gravity at different levels of detail. The model provides not only the geometry of the hull and the main structural systems but also data describing the arrangement of plates and stiffeners of the component panels, including scantlings, spacing and materials. The system is intended to be used as a tool for generating an initial product model of the hull structures at the basic design stage. This work describes a computer system developed for the fast parametric generation of a 3D model of ship hull structure.

Ship construction 7th edition pdf free download