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Chapter 16: Composite Materials

ISSUES TO What are the classes and types of composites? Why are composites used instead of metals,ceramics, or polymers? Chapter 16: Composite MaterialsChapter 16 -1ceramics, or polymers? How do we estimate Composite stiffness & strength? What are some typical applications?Composites Combine Materials with the objective of getting a more desirable combination of properties Ex: get flexibility & weight of a polymer plus the strength of a ceramic structure Materials for aircraft engine: low densities, strong, stiff, abrasion and impact resistant and corrosion 16 -2corrosion engine: Principle of combined action Mixture gives averaged propertiesbetter property combinations are fashioned by the combination of 2 or more distinct Materials . Composite is considered to be any multiphase Materials that exhibits a significant proportion of the properties of both constituent phases such that a better combination of properties is 16 -3 Schematic representations of the various geometrical and spatial characteristics of particles of the dispersed phase that may influence the properties of composites: (1) concentration, (b) size, shape, (d) distribution, and (e) orientation.

Continuous fibers - Estimate fiber-reinforced composite strength for long continuous fibers in a matrix • Longitudinal deformation s c = s mV m + s fV f but e c = e m = e f Chapter 16 -19 volume fraction isostrain \ E ... • Stacked and bonded fiber-reinforced sheets

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Chapter 2. Atomic Structure and Interatomic Bonding

web.eng.fiu.edu

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web.eng.fiu.edu

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web.eng.fiu.edu

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