mse16 - Chapter 16: Composite Materials ISSUES TO ADDRESS....

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1 Chapter 16 - 1 ISSUES TO ADDRESS. .. • What are the classes and types of composites? • Why are composites used instead of metals, ceramics, or polymers? • What are some typical applications? Chapter 16: Composite Materials Chapter 16 - 2 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 • Principle of combined action – Mixture gives “averaged” properties
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2 Chapter 16 - 3 Composites : -- Multiphase material w/significant proportions of each phase. Dispersed phase : -- Purpose: enhance matrix properties. MMC : increase σ y , TS , creep resist. CMC : increase Kc PMC : increase E , σ y , TS , creep resist. -- Classification: Particle , fiber , structural Matrix : -- The continuous phase -- Purpose is to: - transfer stress to other phases - protect phases from environment -- Classification: MMC, CMC, PMC metal ceramic polymer Reprinted with permission from D. Hull and T.W. Clyne, An Introduction to Composite Materials , 2nd ed., Cambridge University Press, New York, 1996, Fig. 3.6, p. 47. Terminology/Classification woven fibers cross section view 0.5mm 0.5mm Chapter 16 - 4 Composite Survey Large- particle Dispersion- strengthened Particle-reinforced Continuous (aligned) Aligned Randomly oriented Discontinuous (short) Fiber-reinforced Laminates Sandwich panels Structural Composites Adapted from Fig. 16.2, Callister 7e .
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3 Chapter 16 - 5 Composite Survey: Particle-I •E x am p le s : Adapted from Fig. 10.19, Callister 7e . (Fig. 10.19 is copyright United States Steel Corporation, 1971.) - Spheroidite steel matrix: ferrite ( α ) (ductile) particles: cementite (Fe 3 C) (brittle) 60 μ m Adapted from Fig. 16.4, Callister 7e . (Fig. 16.4 is courtesy Carboloy Systems, Department, General Electric Company.) - WC/Co cemented carbide matrix: cobalt (ductile) particles: WC (brittle, hard) V m : 10-15 vol%! 600 μ m Adapted from Fig. 16.5, Callister 7e . (Fig. 16.5 is courtesy Goodyear Tire and Rubber Company.) - Automobile tires matrix: rubber (compliant) particles: C (stiffer) 0.75 μ m Particle-reinforced Fiber-reinforced Structural Chapter 16 - 6 Composite Survey: Particle-II Concrete – gravel + sand + cement
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This note was uploaded on 10/26/2009 for the course MSE 250 taught by Professor Jone during the Summer '09 term at University of Michigan-Dearborn.

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mse16 - Chapter 16: Composite Materials ISSUES TO ADDRESS....

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