Composites - Introduction Composites are materials...

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Introduction • Composites are materials consisting of two or more physically and/or chemically distinct phases • Mixing different mixtures or phases creates a material that has an average property of those constituent materials • Composites are defined by a matrix and reinforcement – Matrix: Major, continuous phase that holds materials together – Reinforcement: Minor phase that transmits load to the matrix (or vice versa) • The interface between the matrix and reinforcement plays a critical role in determining the materials behavior – Interface influences load transfer and crack propagation – Strong interfaces give you high strength and good load transfer – Weak interfaces give you high toughness – Be careful of interface reactions (chemical) 1
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Designing Hybrids
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General Classifications of Composites • Matrix basis – Polymer matrix composites (PMCs) – Metal matrix composites (MMCs) – Ceramic matrix composites (CMCs) • Reinforcement basis – Particle reinforcement – short fiber reinforcement – continuous fiber reinforcement – laminate reinforcement 3
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Medium-high Temperature Medium-high Strength Medium-high Density High Thermal-Electric Conductivity High Temperature High Compressive Strength Corrosion Resistance Medium Density Brittle Low Temperatures Medium Strength Low Density Ceramic Matrix + Polymer Polymer Matrix + Metal Polymer Matrix + Ceramic Metal Matrix + Polymer Metal Matrix + Ceramic Ceramic Matrix + Metal Metal Matrix + Metal Ceramic Matrix + Ceramic Polymer Matrix + Polymer
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Hybrid Types
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This note was uploaded on 11/16/2011 for the course EMA 4223 taught by Professor Mecholsky during the Spring '08 term at University of Florida.

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Composites - Introduction Composites are materials...

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