Presenter Information

Susan N. Vernon, United States Navy

Location

La Jolla, CA

Start Date

1-1-1989 12:00 AM

Description

Eddy current nondestructive evaluation (NDE) is usually associated with the detection and measurement of surface defects in metal and with the through-thickness inspection of thin-wall metal tubing. The greater electrical resistivity of carbon fiber reinforced composites (CFRCs), excluding metal matrix composites, results in much greater skin depths or standard depths of penetration, thereby providing for the through-thickness inspection of much thicker components than are usually associated with eddy current NDE. For example, skin depths in copper and 304 stainless steel at 10 kHz are 0.026 inch** and 0.168 inch, respectively. Assuming typical resistivity values for carbon/carbon and graphite epoxy, skin depths in these materials at 10 kHz are 0.56 and 1.98 inch, respectively.

Volume

8B

Chapter

Chapter 8: Composites

Section

Composites—Properties

Pages

1543-1550

DOI

10.1007/978-1-4613-0817-1_194

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

Eddy Current Inspection of Thick Carbon Fiber Reinforced Composites

La Jolla, CA

Eddy current nondestructive evaluation (NDE) is usually associated with the detection and measurement of surface defects in metal and with the through-thickness inspection of thin-wall metal tubing. The greater electrical resistivity of carbon fiber reinforced composites (CFRCs), excluding metal matrix composites, results in much greater skin depths or standard depths of penetration, thereby providing for the through-thickness inspection of much thicker components than are usually associated with eddy current NDE. For example, skin depths in copper and 304 stainless steel at 10 kHz are 0.026 inch** and 0.168 inch, respectively. Assuming typical resistivity values for carbon/carbon and graphite epoxy, skin depths in these materials at 10 kHz are 0.56 and 1.98 inch, respectively.