The composite material bonding flaw detector is mainly used to detect bonding defects, delamination, debonding and other issues in composite materials, and can also be used to detect defects such as cracks and pores in metal materials.
The following introduction of core detection technology
1. Eddy current testing technology
Principle: By inducing eddy currents in a metal sample through an energized coil, defects can cause changes in the distribution of eddy currents, which are then captured by the detection coil.
Advantages: Sensitive to small cracks, pores, and other defects in metal metal bonding layers, suitable for surface and near surface inspection.
Application: Testing the bonding quality of metal composite materials, such as carbon fiber reinforced metal matrix composites.
2. Ultrasonic testing technology
Pulse reflection method: emits high-frequency sound waves, locates defects by receiving reflection signals from defect interfaces, and combines A-scan display mode (with propagation time on the x-axis and reflection wave amplitude on the y-axis) to determine defect depth.
Phased array ultrasound technology: using multiple array element probes to generate multi angle ultrasound beams, covering a wider detection area, combined with dynamic focusing algorithm to achieve high-precision imaging.
Fully Focused Matrix (TFM) technology: collects transmit receive full matrix data through Full Matrix Capture (FMC), reconstructs high-resolution images based on delay compensated beamforming, and has a noise suppression rate greater than 40dB.
Application: Detecting delamination and debonding of laminated composite materials (such as carbon fiber reinforced plastics), as well as debonding of the skin and core materials of honeycomb structure composite materials.
3. Resonance mode detection
Principle: Use the phase and amplitude changes of the probe resonance to detect debonding, with the assistance of a coupling agent.
Advantages: Sensitive to deep debonding, with a detection depth of over 60mm.
Application: Detecting debonding defects between the main beam and skin of wind turbine blades.
4. Mechanical impedance analysis
Principle: Measure the stiffness changes of materials under testing conditions, and identify debonding or structural damage through phase and wave amplitude outputs.
Advantages: Sensitive to small area debonding of honeycomb structure composite materials, suitable for complex geometric shape detection.
Application: Testing the bonding quality of aviation honeycomb structures, such as wing skins and honeycomb cores.