Porosity reference standard for ultrasonic inspection of...

Details Porosity reference standard for ultrasonic inspection of... Porosity reference standard for ultrasonic inspection of...

2005-10-31

2008-10-14

Williams, Hezron E. (Department: 2856)

Measuring and testing

Vibration

Sensing apparatus

C073S001860, C073S627000

Reexamination Certificate

active

07434468

ABSTRACT:
A porosity reference standard for ultrasonic inspection of composite materials includes a right prism manufactured from a solid isotropic material and a porosity created within the right prism. The porosity reference standard may be a glass block that encloses a plurality of simulated voids created through laser etching. The porosity reference standard may be manufactured by using a sub surface laser engraving process. By creating a porosity within the glass block, the level of the porosity can be exactly determined and is spatially constant over a desired area within the glass block. The laser-etched porosity reference standard is suitable for, but not limited to, ultrasonic porosity inspection of composite laminate parts, such as wings, empennage and fuselage skins, sub-skin structures, frames stringer, and shear ties, used in the aircraft airframe industry, both commercial and defense.

REFERENCES:
patent: 6426274 (2002-07-01), Tayanaka
patent: 6684701 (2004-02-01), Dubois et al.
patent: 7216544 (2007-05-01), Vaccaro et al.
patent: 2006/0234391 (2006-10-01), Weiss et al.
patent: 2007/0006651 (2007-01-01), Kruger et al.
patent: 2007/0119256 (2007-05-01), Vaccaro et al.

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