Definitions /Dictionary/Glossary - nptel
Definitions /Dictionary/Glossary - nptel
Definitions /Dictionary/Glossary - nptel
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where 1- α is called the confidence coefficient. A statement of type (1) or (2) is called a onesided<br />
confidence interval and a statement of type (3) is called a two-sided confidence interval. In<br />
(1) a is a lower confidence limit and in (2) b is an upper confidence limit. With probability at<br />
least 1- α, the confidence interval will contain the parameter θ.<br />
Connection: Where two panels are attached to each other or a panel is attached to the building.<br />
Consolidation: A processing step that compresses fiber and matrix to reduce voids and achieve a<br />
desired density.<br />
Constituent: In general, an element of a larger grouping. In advanced composites, the principal<br />
constituents are the fibers and the matrix.<br />
Contact Adhesive: An adhesive that .is apparently dries to touch and that will adhere to itself<br />
simultaneously upon contact.<br />
Contact Molding: A process for molding reinforced plastics in which reinforcement and resin<br />
are placed on a mold, cure is either at room temperature using a catalyst-promoter system or by<br />
heat in an oven and no additional pressure is used.<br />
Contact Pressure Molding: A method of molding in which the pressure, usually less than 69<br />
kPa (10 psi), is usually necessary to hold the materials together.<br />
Contact Pressure Resin: Liquid resins that thicken or polymerize on heating and when used for<br />
bonding laminates, require little or no pressure.<br />
Contaminant: Impurity or foreign substance that affects one or more properties of composite<br />
material, particularly adhesion.<br />
Continuous Filament: A yarn or strand in which the individual filaments are substantially the<br />
same length as the strand.<br />
Continuous-Filament Yarn: Yarn that is formed by twisting two or more continuous filaments<br />
into a single continuous strand.<br />
Continuous Heat Resistance: This is the maximum temperature the material should be<br />
subjected to in a continuous application. Below this temperature the material is acceptable.<br />
Above this temperature the material may decompose, melt, or otherwise fail in an application.<br />
Units - degrees Fahrenheit ((F) - degrees Centigrade ((C). Higher numbers mean that the material<br />
can be used continuously at higher temperatures.<br />
Continuous Laminating: A process for forming panels and sheeting in which fabric or a mat is<br />
passed through a resin dip, brought together between cellophane covering sheets, and passed<br />
through a heating zone for cure. Squeeze rolls control thickness and resin content as the various<br />
plies are brought together.