Handheld probe for nondestructive evaluation of deep subsurface cracks.
NASA’s Langley Research Center has developed a new nondestructive evaluation probe to detect small fatigue cracks prior to the onset of widespread fatigue damage. The detection of deeply buried fatigue cracks in thick multilayer structures like airplane wings continues to be a challenge for the nondestructive evaluation community. This new technology leverages the low frequency magnetic field sensitivity of giant magnetoresistive (GMR) sensors to identify subsurface cracks up to 1 cm deep. The handheld probe has been tested, and NASA Langley is seeking partners to license and commercialize it.