Volume 34, Issue 3 (May 2006)
Instrumentation for Determining the Local Damping Capacity in Honeycomb Sandwich Composites
A mechanical percussion probe originally designed for determining the damping capacity of dental implants has been adapted to assess the damping capacity in a localized area of honeycomb sandwich composites without inflicting damage on the structure. The new instrumentation is light, portable, and inexpensive compared with other testing techniques. Furthermore, it allows quick access to areas not easily accessible by ultrasonic methods. The damping capacity of honeycomb sandwich composite structures is of interest to engineers as it reflects the ability of a material to absorb and isolate vibration. Honeycomb sandwich structures with various damping treatments were constructed and accurately evaluated with the instrumentation. Detection capabilities and limitations were also evaluated.