Definitions /Dictionary/Glossary - nptel
Definitions /Dictionary/Glossary - nptel
Definitions /Dictionary/Glossary - nptel
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Intra-laminar: Within the laminae of a laminate.<br />
Discussion: describing objects (for example, voids), event (for example, fracture), or<br />
fields (for example, stress).<br />
Intra-ply Hybrid: A composite in which different materials are used within a specific layer or<br />
band.<br />
Intumescent: A fire-retardant technology which causes an otherwise flammable material to<br />
foam, forming an insulating barrier when exposed to heat.<br />
In-Situ: In the position which it will finally occupy, e.g. molding or forming foam.<br />
Irreversible: Chemical reactions that proceed in a single direction and are not capable of<br />
reversal (As applied to thermosetting resins).<br />
Isocyanate Plastics: Plastics based on resins made by the condensation of organic isocyanates<br />
with other compounds.<br />
ISO: Abbreviated terminology for the isophthalic acid type resins and gel coats.<br />
Isotropic -- Having uniform properties in all directions. The measured properties of an isotropic<br />
material are independent of the axis of testing.<br />
Isophthalic: A polyester resin based on isophthalic acid, generally higher in properties that a<br />
general purpose or orthothatic polyester resin.<br />
Izod Impact Test: A destructive test designed to determine the resistance of a plastic to the<br />
impact of a suddenly applied force.<br />
Jackstrawing: Prominence of fiberglass pattern having turned white in the Laminants<br />
because the glass has separated from the resin due to excessive exothermic heat usually<br />
associated with thick, resin rich Laminants.<br />
Jig: Any fixture for holding parts in position, while joining them together or to maintain their<br />
shape.<br />
Joint: A line or distinction formed when two panels are connected. It is also referred to as a<br />
seam.<br />
Jammed State: It is the state of a braided fabric under tension or compression where the<br />
deformation of the fabric is dominated by the deformation properties of the yarn.<br />
Kerf: The width of a cut made by a saw blade, torch, water jet, laser beam, etc.<br />
Kevlar: Trademark of DuPont for aramid fibers used as a reinforcement fiber.