Telltale heat
Monday, March 23, 2009 - 10:21
in Physics & Chemistry
At first glance, the rotor blade appears to be flawless, but the expert knows that outward appearances cannot be trusted. He taps the surface and listens. A full, deep sound tells him that the laminate is homogeneous, while a more flat, hollow tone indicates irregularities in the material. Delaminated and hollow sections of a certain size near the surface can also be detected by running an expert hand over the surface material. But even an experienced inspector cannot find all hidden faults in this way...