Definitions /Dictionary/Glossary - nptel
Definitions /Dictionary/Glossary - nptel
Definitions /Dictionary/Glossary - nptel
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Fabrication: The process of making a composite part or tool.<br />
Fabricator: Manufacturer of reinforced plastic products.<br />
Face Dimpling: The compressive buckling of the facing in between the honeycomb cell walls<br />
caused by thin facings or large cell core.<br />
Face Wrinkling: The local compressive instability of facing; similar to plate buckling on an<br />
elastic foundation.<br />
Facing: It is one of the two outer layers, which has been bonded to the core of a sandwich.<br />
Facing Failure: It is the sandwich panel failure caused by the facing failing in compression,<br />
tension or local buckling.<br />
Fading: It is loss of color in the gel coat.<br />
Fairing: A member or structure, the primary function of which is to streamline the flow of a<br />
fluid by producing a smooth outline and to reduce drag.<br />
Fatigue: The failure or decay of mechanical properties after repeated applications of stress.<br />
Fatigue Life: The number of cycles of deformation required to bring about failure of the test<br />
specimen under a given set of oscillating conditions.<br />
Fatigue Limit: It is the stress below which a material can be stressed cyclically for an infinite<br />
number of times without failure.<br />
Fatigue Ratio: It is the ratio of fatigue strength to tensile strength.<br />
Fatigue Strength: It is the maximum cyclic stress a material can withstand for a given number<br />
of cycles before failure occurs; the residual strength after being subjected to fatigue.<br />
Faying Surfaces: These are the surfaces of materials in contact with each other and joined or<br />
about to be joined together.<br />
FEA: Finite element analysis, a process of selecting the optimum combination of materials in a<br />
composite based on software analysis.<br />
Feathered Edge: In reference to chopped strand mat, this is a mat whose edge was not trimmed<br />
during production. Consequently, the edge tapers down in weight instead of abruptly ending.<br />
Fell: The point of braid formation, which is defined as the point at which the yarns in a braid<br />
system cease movement relative to each other.