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Properties in Materials for Ship Frame Structure

Bangshidhar Goswami, Sanatan Prasad, Gayan Shankar Sharma, Jeevan Kumar

Abstract


Materials for ship building select materials for hull and superstructures. Buoyancy, stability, stiffness, resistance to buckling and distortion, corrosions, osmosis into laminates and fire risks are main properties. The aim is to resist distributions of gravity waves, hogging moment of cargo, sagging moment and deflections. Materials selected are iron and steel, aluminium, cupro-nickel, glass reinforced plastics, epoxy laminates, concrete and wood as load carrying members like girders, beams and stiffeners. Developments in materials for selection in shipbuilding are wrought iron, mild steel for notch ductile crack arrest, improved strength and toughness properties in different thicknesses of as-rolled, controlled-rolled or normalized conditions. Concrete (Ferro-cement and gravel aggregates) ship hulls are better than steel for general-purpose shipping. 9% nickel steel and 18/8 stainless steels are cryogenic materials used for under temperature cargo. Cupronickel has been bio-fouling structural material used as steel clad (2–3 mm thick) materials by roll-bonding. Light-weight super structures are made of Al-Mg alloys and reinforced plastics.


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DOI: https://doi.org/10.3759/joost.v6i2.700

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