Structure & Properties of Materials - Composites

These flashcards cover key terms and definitions related to composites as discussed in the lecture on the structure and properties of materials.

Composite

A combination of two or more individual materials to obtain a new material with unique properties.

Matrix Phase

The continuous phase in a composite that holds the dispersed phase and transfers stress.

Dispersed Phase

The discontinuous phase in a composite that is surrounded by the matrix and contributes to the composite's properties.

Metal Matrix Composites (MMCs)

Composites that use a metal as the matrix and are reinforced with other materials such as ceramics or fibers.

Polymer Matrix Composites (PMCs)

Composites that utilize a polymer as the matrix material, often reinforced with fibers.

Ceramic Matrix Composites (CMCs)

Composites with a ceramic matrix that are reinforced with fibers or other ceramic materials.

Fiber-Reinforced Composites

Materials that have strong fibers surrounded by a weaker matrix material, increasing strength and stiffness.

Particle-Reinforced Composites

Composites that rely on the addition of particles to a matrix to enhance mechanical properties.

Specific Modulus

The ratio of the modulus of elasticity to the specific gravity of a material, indicating performance per unit weight.

Creep Resistance

The ability of a material to resist deformation under persistent stress over time.

Honeycomb Core

A lightweight core structure used in sandwich panels that provides high bending stiffness and low density.

Laminar Composites

Multilayered structures consisting of two-dimensional sheets bonded together, offering enhanced mechanical properties.

Thermoplastics

Polymers that become pliable upon heating and solidify upon cooling, allowing for recycling and reshaping.

Thermosets

Polymers that undergo a chemical change when heated so that they retain their shape and do not melt upon reheating.

Glass Fiber Reinforced Plastic (GFRP)

Composites made from glass fiber embedded in a polymer matrix, known for its high strength and low weight.

Continuous Fiber

Fibers that extend uninterrupted throughout the composite, contributing to its strength and stiffness.

Discontinuous Fiber

Fibers that are chopped or broken into shorter lengths, providing flexibility and easier processing.

Tensile Strength (UTS)

The maximum stress a material can withstand while being stretched before failing.

Yield Strength (σy)

The stress at which a material begins to deform plastically and will not return to its original shape.