Definitions /Dictionary/Glossary - nptel
Definitions /Dictionary/Glossary - nptel
Definitions /Dictionary/Glossary - nptel
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Negatively Skewed: A distribution is said to be negatively skewed if the distribution is not<br />
symmetric and the longest tail is on the left.<br />
NEO: Abbreviation for the neopentyl glycol type of gel coats.<br />
Nesting: In reinforced plastics, the placing of plies of fabric so that the yarns of one ply lie in the<br />
valleys between the yams of the adjacent ply (nested cloth).<br />
Net Resin Content Prepreg: A prepreg product form that contains the final desired resin<br />
content and does not require resin bleeding during the cure process.<br />
Net Shape: Part fabrication resulting in final dimensions that do not require machining or<br />
cutting.<br />
Node: The bonded portion of adjacent ribbon sheets, double sheets.<br />
Node Adhesive: The adhesive used to bond the honeycomb nodes together.<br />
Nol Ring: A parallel filament wound test specimen used for measuring various mechanical<br />
strength properties of the material by testing the entire ring, or segments of it.<br />
Nomex: Trademark of DuPont for nylon paper-treated material that is commonly made into<br />
honeycomb core.<br />
Nominal Specimen Thickness: The nominal ply thickness multiplied by the number of plies.<br />
Nominal Value: A value assigned for the purpose of a convenient designation. A nominal value<br />
exists in name only.<br />
Non-Air-Inhibited Resin: A resin in which the surface cure will not be inhibited or stopped by<br />
the presence of air. A surfacing agent has been added to exclude air from the surface of the resin.<br />
Non-perforated Core: The standard aluminium honeycomb with no small holes put in the<br />
aluminium foil.<br />
Non-Volatile Material: Portion remaining as solid under specific conditions short of<br />
decomposition.<br />
Nondestructive Inspection (NDI): A process or procedure for determining material or part<br />
characteristics without permanently altering the test subject. Non-destructive testing (NDT) and<br />
non-destructive evaluation (NDE) are broadly considered synonyms with NDI.<br />
Non-Woven Fabric: A textile structure produced by bonding or interlocking of fibers, or both,<br />
accomplished by mechanical, chemical, thermal, or solvent means and combinations thereof.