Location

La Jolla, CA

Start Date

1-1-1993 12:00 AM

Description

Among all the nondestructive evaluation (NDE) techniques that are used in industry, Stimulated Infrared Thermography (SIRT) is very attractive because of its noncontact and rapid-scanning ability [1]. In our laboratory, we applied this technique to composite materials which are often used in aerospace structures. In particular, we applied it to carbon/epoxy composites [2,3]. Due to the relatively low refresh frequency of the monocell IR cameras, the application of the method was restricted to low thermal conductors. Some new developments of the data reduction procedure were presented last year [4] to use this technique with good heat conductors. Satisfactory results were obtained in the case of delaminations in carbon/carbon (c/c) composites which will constitute the hottest parts of the thermal protection of the european space shuttle Hermes. A few months ago, we presented an improvement of this data reduction procedure which is able now to work with any kind of material and we applied it on the especially difficult case of the characterization of adhesive joints in metallic structures [5]. We present here the last results obtained in c/c composites by our SIRT techniques with the new data reduction procedure.

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

12B

Chapter

Chapter 5: Engineered Materials

Section

Composite Properties

Pages

1297-1304

DOI

10.1007/978-1-4615-2848-7_165

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

Quantitative Nondestructive Evaluation of Carbon-Carbon Composites by Pulsed Infrared Thermography

La Jolla, CA

Among all the nondestructive evaluation (NDE) techniques that are used in industry, Stimulated Infrared Thermography (SIRT) is very attractive because of its noncontact and rapid-scanning ability [1]. In our laboratory, we applied this technique to composite materials which are often used in aerospace structures. In particular, we applied it to carbon/epoxy composites [2,3]. Due to the relatively low refresh frequency of the monocell IR cameras, the application of the method was restricted to low thermal conductors. Some new developments of the data reduction procedure were presented last year [4] to use this technique with good heat conductors. Satisfactory results were obtained in the case of delaminations in carbon/carbon (c/c) composites which will constitute the hottest parts of the thermal protection of the european space shuttle Hermes. A few months ago, we presented an improvement of this data reduction procedure which is able now to work with any kind of material and we applied it on the especially difficult case of the characterization of adhesive joints in metallic structures [5]. We present here the last results obtained in c/c composites by our SIRT techniques with the new data reduction procedure.