Establishing a shipbuilding production cost structure is a fundamental management activity, concerning materials and fabrication. Shipyards compete in world market niches regarding vessel type and dimensions. Therefore, the vessel's market price has a tremendous influence on the shipyard's determination of the price of the vessel offered to buyers. For this reason, shipyard management is forced to concentrate its efforts on production cost structure optimisation in order to achieve the goal of a profitable shipyard. In this paper, a computer-integrated cost structure optimisation model for defining an optimal and profitable vessel production cost structure is presented. Statistical analysis of the data was performed for a sample of tankers, built in selected shipyards. Probabilistic theory was applied and several results, such as expectation for aggregate figures, are presented. Such a tool for obtaining an optimal production cost structure enables shipyard management to carry out more effective decision-making, and also better cost control within model parameters. Furthermore, dynamical control of costing figures for the whole shipbuilding process is possible and has a significant influence on the final results. The mathematical model for achieving an optimal structure of the production costs was verified and tested against a real example of the construction of tankers.

Sandwich structures are well-known and frequently used solutions in marine applications, especially when structural stiffness is required. An important part of the sandwich structure is the core, which usually carries shear loads. Therefore, choosing a reliable test method and knowing the exact shear properties of the particular core used in the structural design is beneficial for every engineer. Shear properties of the FlexyFoam M-55, a closed-cell, lightweight PVC foam with an apparent density of 60 kg/m³, have been investigated according to the ASTM C273 standard, using the tensile and compressive loading of metal supporting plates glued to the PVC foam sample. A digital image correlation (DIC) technique was used to monitor the crack propagation, and the appearance of secondary stresses at the foam-adhesive interface and strain field for the representative sample was presented. Displacement was measured using the testing machine sensors and compared to the measurements from the DIC technique. Specimen manufacturing details, surface preparation, and the gluing sequence were described, and measuring equipment and experiment settings were presented. Stress-strain curves have been presented and shear modulus and ultimate shear strength of the foam were compared for each test approach. The results were discussed and compared with the manufacturer’s data, as well as with foams of similar densities. The well-established approach in testing the core material was discussed, and recommendations were given to improve the testing procedure.

Composite materials are in use in the shipbuilding industry for a long period of time. Composites appear in vast number of fibre – matrix combinations and can be produced with several different production processes. Due to the specific nature of the composite material structure, the selection of the production process and the limitations in the quality control procedures, composite materials will always be subject to defects and imperfections which may, under certain circumstances, lead to the appearance and propagation of cracks. The size and the shape of the crack, the load type and the stress field in the material surrounding the crack will be crucial for crack growth and crack propagation. This paper reviews the composite material damage processes especially relevant for shipbuilding. The basic principles of composite material fracture mechanics are briefly explained, and finally, mechanisms responsible for the development of damage and fracture of composite materials are presented. This paper has emerged from the need to summarize information about composite material fracture and failure mechanisms and modes relevant for the shipbuilding industry.

This book deals with various aspects concerning the design and fabrication of vessels for maritime transportation, namely, hydrodynamics, structures, machinery and propulsion systems, control systems, vessel design and shipyard technology, maintenance and repair. These volumes bring together an extensive collection of papers reflecting a number of fundamental areas of the exploitation of ocean and coastal resources. Subjects include the marine environment; fisheries and aquaculture; maritime transportation and port operation; coastal and offshore development; safety and reliability; and protection of the environment. This book deals with various aspects concerning the design and fabrication of vessels for maritime transportation, namely, hydrodynamics, structures, machinery and propulsion systems, control systems, vessel design and shipyard technology, maintenance and repair. These volumes bring together an extensive collection of papers reflecting a number of fundamental areas of the exploitation of ocean and coastal resources. Subjects include the marine environment; fisheries and aquaculture; maritime transportation and port operation; coastal and offshore development; safety and reliability; and protection of the environment. This book deals with various aspects concerning the design and fabrication of vessels for maritime transportation, namely, hydrodynamics, structures, machinery and propulsion systems, control systems, vessel design and shipyard technology, maintenance and repair. These volumes bring together an extensive collection of papers reflecting a number of fundamental areas of the exploitation of ocean and coastal resources. Subjects include the marine environment; fisheries and aquaculture; maritime transportation and port operation; coastal and offshore development; safety and reliability; and protection of the environment. This book deals with various aspects concerning the design and fabrication of vessels for maritime transportation, namely, hydrodynamics, structures, machinery and propulsion systems, control systems, vessel design and shipyard technology, maintenance and repair. These volumes bring together an extensive collection of papers reflecting a number of fundamental areas of the exploitation of ocean and coastal resources. Subjects include the marine environment; fisheries and aquaculture; maritime transportation and port operation; coastal and offshore development; safety and reliability; and protection of the environment. This book deals with various aspects concerning the design and fabrication of vessels for maritime transportation, namely, hydrodynamics, structures, machinery and propulsion systems, control systems, vessel design and shipyard technology, maintenance and repair. These volumes bring together an extensive collection of papers reflecting a number of fundamental areas of the exploitation of ocean and coastal resources. Subjects include the marine environment; fisheries and aquaculture; maritime transportation and port operation; coastal and offshore development; safety and reliability; and protection of the environment. This book deals with various aspects concerning the design and fabrication of vessels for maritime transportation, namely, hydrodynamics, structures, machinery and propulsion systems, control systems, vessel design and shipyard technology, maintenance and repair. These volumes bring together an extensive collection of papers reflecting a number of fundamental areas of the exploitation of ocean and coastal resources. Subjects include the marine environment; fisheries and aquaculture; maritime transportation and port operation; coastal and offshore development; safety and reliability; and protection of the environment.

This paper presents results from numerical analysis of the fluid and structure interaction of two different hydrofoil models, Model 1 and Model 2. Analyzes were performed with stainless steel, aluminium and composite materials for Model 1, and Model 2 was created from composite with aluminium reinforcement. Models were analyzed for three different angles of attack (10, 20, 30 degrees) and for each angle three different speeds were tested (2, 4, 6 m/s). At first, the whole set of analysis was run for entirely submerged hydrofoils and later on for immersed hydrofoils to the draft h. Described numerical analysis was performed in order to adjust stiffens of hydrofoils based on different operational loads. Two-way fluid-structure interaction analysis was used which combines FEM and CFD solvers. Presented results are based on 44 analysis with which all planned conditions of hydrofoil operation were tested. Numerical analysis showed a correlation between stiffens of material i.e. structural response and hydrodynamic loading. Besides mentioned, based on analysis of Model 2 future prediction are given in a way of hydrofoil design or particularly placement for hydrofoils reinforcement.