Give some examples of commercial products which are laminar composite structures.

Name the three basic categories of composite materials.

A polymer matrix composite consists of polyester reinforced with Kevlar-29 fibers. The volume fractions of polyester and Kevlar are $60 \%$ and $40 \%$, respectively. The Kevlar fibers have a modulus of elasticity $=60 \mathrm{~GPa}$ in the longitudinal direction and $3 \mathrm{~GPa}$ in the transverse direction. The polyester matrix has a modulus of elasticity $=5.6 \mathrm{~GPa}$ in both directions. (a) Determine the modulus of elasticity for the composite in the (a) longitudinal direction and (b) transverse direction.

How are traditional composites distinguished from synthetic composites?

A rod made of carbon-reinforced epoxy has a diameter $=1.0 \mathrm{~in}$, length $=$ $36.0 \mathrm{~in}$, and mass $=1.45 \mathrm{~lb}$. The carbon fibers have a modulus of elasticity $=50\left(10^6\right) \mathrm{lb} / \mathrm{in}^2$ and a density $=0.069 \mathrm{~lb} / \mathrm{in}^3$. The epoxy matrix has modulus of elasticity $=0.61\left(10^6\right) \mathrm{lb} / \mathrm{in}^2$ and a density $=0.042 \mathrm{~lb} / \mathrm{in}^3$. Assume there are no voids in the rod. What is the volume fraction of (a) the carbon fibers and (b) the epoxy matrix in the rod? Also, what is the predicted value for the modulus of elasticity in the (c) longitudinal direction and (d) direction perpendicular to the carbon fibers?

What does the term anisotropic mean?

What is meant by the term interface in the context of composite materials?

Identify some of the characteristic properties of composite materials.

Name some of the important applications of FRPs.

For the data in the above Problem, determine the modulus of elasticity in (a) the longitudinal direction of the glass fibers and (b) the perpendicular direction to the glass fibers.

Identify some of the important properties of fiber-reinforced plastic composite materials.

What is a hybrid composite?

What does the term advanced composites mean?

What is the most common fiber material in fiber-reinforced plastics?