scholarly journals System of ultrasonic non-destructive testing of carbon fiber composite defects

2018 ◽  
Vol 25 (1) ◽  
pp. 180-183
Author(s):  
Xuerui Wang ◽  
Keyword(s):  
Carbon Fiber ◽  
Fiber Composite ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Carbon Fiber Composite ◽  
Non Destructive

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

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.

scholarly journals DAMAGE PROPAGATION AND THERMOGRAPHY IN DISCONTINUOUS CARBON FIBER COMPOSITE (DCFC) UNDER TENSILE (FATIGUE) LOADING

2019 ◽  
Vol 82 (1) ◽  
Author(s):  
Jefri Bale ◽  
Emmanuel Valot ◽  
Olivier Polit
Keyword(s):  
Fatigue Life ◽  
Carbon Fiber ◽  
Fiber Composite ◽  
Thermal Response ◽  
Fatigue Loading ◽  
Carbon Fiber Composite ◽  
Damage Propagation ◽  
Initial Damage ◽  
Tensile Fatigue ◽  
Non Destructive

The discontinuous carbon fiber composite (DCFC) has a different damage behaviour due to non homogenuous sub structure. Consequently, monitoring and diagnosis of DCFC damage mechanisms require the application of a contactless method in real-time operation, i.e., non destructive method of thermography. The aim of this study is to investigate the damage propagation of DCFC material under tensile (fatigue) condition with non destructive testing (NDT) thermography method. Under fatigue testing, temperature evolutions were monitored by an Infra-Red (IR) camera. The results show that damage propagation and thermal response indicated the similar behaviour which consists of three stages. At the beginning, low temperature increased until ≈ 10% of fatigue life due to the initial damage. The initial damage propagated and the temperature reached the stable thermal state due to the saturation in the damage appearance of micro cracking of matrix and chip until ≈ 80% of fatigue life. At the last ≈ 20% of fatigue life, damage continued to propagate and provoked the occurrence of macro damage that induced the final failure indicated by highest peak of temperature. The analysis from the experiment results concluded that thermal response relates with the damage propagation of DCFC under fatigue loading.

Sign in / Sign up

Export Citation Format

Share Document