In filament winding, the line in a pressure vessel described by the junction of the cylindrical portion and the end dome. Also called tangent line or point. The process whereby each end of roving is kept in the same degree of tension as the other ends making up that ball of roving. See also catenary . Index exotherm The liberation or evolution of heat during the curing of a plastic product.
Index extend To add fillers or low-cost materials in an economy producing endeavor.
To add inert materials to improve void-filling characteristics and reduce crazing. See also filler . The ability of a material to extend or elongate upon application of sufficient force, expressed as percent of the original length. Index extensional-bending coupling A property of certain classes of laminates that exhibit bending curvatures when subjected to extensional loading. Index extensional-shear coupling A property of certain classes of laminates that exhibit shear strains when subjected to extensional loading.