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If the skins are peeled from the core, a sandwich structure loses its strength and stiffness. This can occur under - wave-slamming in fast ferries - rapid depressurisation of an aircraft The single cantilever beam (SCB) is used for thick-skinned structures. The lower skin is loaded forcing a crack along the skin-core interface. The force-displacement (P-δ) curve and crack lengths, a, are recorded The compliance, C, is assumed to follow:
Typical values:
Glass fibre epoxy/balsa 900 J/m2 Carbon fibre/PVC foam 2000 J/m2
BASIC PRINCIPLES : The purpose of a propeller is to convert the power developed by the engine into a useful force called 'Thrust'. This force must be equal to and opposite in
The operation of heating a green compact to an elevated temperature is known as sintering. It is a process by which solid bodies are bonded by atomic forces. It is carried out belo
Q. Explain the grain growth. Ans. Grain growth: After Recrystallization is complete, the strain free grains will continue to grow if the metal specimen is left at elevated te
Q. There is no end centered tetragonal lattice in the bravis list, but there is an end centered orthorhombic lattice. Explain why this is so? Ans. A tetragonal system is
Fire safety management on railway stations: Storage tanks are not allowed above underground structures or within a certain distance of them. Some staff exits are
Compute the motor size required to pump 28.3 cms through a 3,050 m long, 3.66 m diameter pipeline to an upper reservoir 610 m above the lower reservoir. Use a friction facter of 0.
Q. Define co-ordination number. Ans.CO-ORDINATION NUMBER: The number of atoms which are directly surrounding a given atom is known as coordination number. Number of atoms w
explain easily
What is the history of theory of structure?
Q. Describe the various characteristics of metal powders to be considered before their selection for any process. Ans. Metal Powder Characteristics Both t
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