Missouri prof using vibration to identify stress in parts

In the basement of the engineering building on the University of Missouri-Columbia campus, P. Frank Pai is trying to find a quick, convenient and inexpensive method of detecting cracks in airplane parts.

Pai is trying to develop a portable system that can test a part while it's on the aircraft. He has come up with a computer program that analyzes data collected from parts that are vibrated and simultaneously scanned with a laser beam.

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