FIRE DAMAGE ON CARBON FIBER MATERIALS CHARACTERIZED BY THZ WAVES

2007 ◽  
Vol 17 (02) ◽  
pp. 213-224 ◽  
Author(s):  
NICHOLAS KARPOWICZ ◽  
DAVID DAWES ◽  
MARK J. PERRY ◽  
X. -C. ZHANG
Keyword(s):  
Carbon Fiber ◽  
Time Domain ◽  
Fiber Composite ◽  
Fire Damage ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Carbon Fiber Composite ◽  
Damage Level ◽  
Fiber Materials ◽  
Non Destructive

We apply THz imaging technology to evaluate fire damage to a variety of carbon fiber composite samples. The majority of carbon fiber materials have polarization-dependent reflectivities in the THz frequency range, and we show how the polarization dependence changes versus the burn damage level. Additionally, time domain information acquired through a THz time-domain spectroscopy (TDS) system provides further information with which to characterize the damage. The technology is discussed in terms of non-destructive testing applications to the defense and aerospace industries.

scholarly journals Repeatability Study of Flash-Pulse Thermographic Inspection of CFRP Samples

2021 ◽  
Vol 8 (1) ◽  
pp. 1
Author(s):  
Michal Švantner ◽  
Lukáš Muzika ◽  
Alexey Moskovchenko ◽  
Celeste M. C. Pereira ◽  
Shumit Das
Keyword(s):  
Statistical Evaluation ◽  
Fiber Composite ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Carbon Fiber Composite ◽  
Repeatability And Reproducibility ◽  
Defects Identification ◽  
Non Destructive ◽  
Reference Samples ◽  
Composite Samples

Thermographic flash-pulse inspection is one of popular methods of non-destructive testing (NDT) of materials. Despite the automation of the NDT methods, most of them are based on visual inspections and results of these inspections are influenced by the skills of operators. The repeatability and reproducibility (R&R) of these inspections are therefore more important compared to exact gauge-type methods. This study was focused on the statistical evaluation of flash pulse inspection. Space hardware representative carbon-fiber composite samples with 50 artificial defects were used as reference samples, which were independently inspected by three operators in two independent runs. A Gage R&R study was performed based on contrast to noise ratio defects identification. It was determined that at certain conditions, a total R&R variability 29% can be achieved, which can be assumed as acceptable for this application.

scholarly journals Non-destructive characterization of carbon fiber composite/Cu joints for nuclear fusion applications

2008 ◽  
Vol 83 (5-6) ◽  
pp. 702-712 ◽  
Author(s):  
Valentina Casalegno ◽  
Milena Salvo ◽  
Monica Ferraris ◽  
Federico Smeacetto ◽  
Mario Merola ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Fiber Composite ◽  
Nuclear Fusion ◽  
Carbon Fiber Composite ◽  
Fusion Applications ◽  
Non Destructive ◽  
Non Destructive Characterization

Non-destructive testing of composite materials using terahertz time-domain spectroscopy

2016 ◽  
Author(s):  
Egor V. Yakovlev ◽  
Kirill I. Zaytsev ◽  
Nikita V. Chernomyrdin ◽  
Arsenii A. Gavdush ◽  
Arsen K. Zotov ◽  
...  
Keyword(s):  
Composite Materials ◽  
Time Domain ◽  
Non Destructive Testing ◽  
Terahertz Time Domain Spectroscopy ◽  
Destructive Testing ◽  
Time Domain Spectroscopy ◽  
Non Destructive

Infrared Thermography Non-Destructive Testing of Composite Materials

2011 ◽  
Vol 291-294 ◽  
pp. 1307-1310 ◽  
Author(s):  
Cui Qin Wu ◽  
Wei Ping Wang ◽  
Qi Gang Yuan ◽  
Yan Jun Li ◽  
Wei Zhang ◽  
...  
Keyword(s):  
Composite Materials ◽  
Infrared Thermography ◽  
Fiber Composite ◽  
High Energy ◽  
Non Destructive Testing ◽  
Solid Rocket Motor ◽  
Destructive Testing ◽  
Inspection Method ◽  
Active Infrared Thermography ◽  
Non Destructive

To detect the delamination, disbond，inclusion defects of the glass fiber composite materials applied in the solid rocket motor, active infrared thermographic non-destructive testing(NDT) is researched. The samples including known defects are heated by pulsed high energy flash lamp. The surface temperature of the samples is monitored by infrared thermography camera. The results of the experiments show that the active infrared thermography technique is a fast and effective inspection method for detecting the defects of delamination, disbond，inclusion of the composites. The samples are also detected by underwater ultrasonic c-scans. The paper concludes that the active infrared thermography NDT is more suitable to rapidly detect the defect in large-area and the underwater ultrasonic c-scans is more suitable to quantitatively identify the defect in local-area.

Sign in / Sign up

Export Citation Format

Share Document