Composite damping material

A composite material, comprising:

• a matrix material;
• an elongate tubular member disposed within the matrix material, the tubular member comprising a cross-section defining an internal space, the cross-section changing shape when the composite material is subjected to a force, thereby changing a volume of the internal space;
• and
• a fluid within the internal space having a viscosity, whereby, as the volume of the internal space changes in response to the force, the fluid moves within the internal space, thereby damping the force.

A composite material, comprising:

• a matrix material;
• a first body disposed within the matrix material, the first body comprising a first internal space, the first internal space changing shape when the composite material is subjected to a force, thereby increasing a volume of the first internal space;
• a second body disposed within the matrix material, the second body comprising a second internal space, the second internal space communicating with the first internal space, the second internal space changing shape when the composite material is subjected to a force, thereby decreasing a volume of the second internal space;
• and
• a fluid within the first and second internals space having a viscosity, whereby, as the volumes of the first and second internal spaces change in response to the force, fluid moves between the first and second internal spaces, thereby damping the force.

A method for making a composite material, comprising:

• providing a body comprising an internal space;
• introducing a viscous fluid into the internal space;
• and
• encapsulating the body within a matrix material.