Customized Solutions

Matrix Defects, other Composites and Geometry/Contour Testing

The classic Eddy Current testing heavily relies on the presence of electrically conductive material. SURAGUS however advances the eddy current-based approach towards highly accurate and super-fast testing of low-conductive to non-conductive materials, such as glass reinforced plastics or pure polymers

For specific measurement tasks SURAGUS combines eddy current-based sensors with complementary ultrasonic or laser technology. These hybrid systems ensure an optimal solution for any challenging measurement task.

 

Matrix Defects

Matrix system are typically non-conducting polymers with the task to protect and to stabilize the reinforcing fiber. From an electric perspective, CFRP  matrix material acts as dielectric separator between the conductive fibers. Dielectric properties can be captured using specific SURAGUS probes working at high frequencies, deeply analyzing the impact of chemical cross-linking, curing or overheating.

Carbon fiber infiltration defect

Other Composites (e.g. GFRP)

SURAGUS high frequency eddy current technology is sensitive to a dielectric material property, called permittivity. The scanning system accurately measures the effective permittivity , displaying local variations in the analyzed sample. A SURAGUS sensor scan reveals the layup of a glass fiber reinforced plastic and any local inhomogeneities in high local resolution without any need for coupling media, X-ray radiation or even sample destruction.

Monitoring the permittivity change over time

  • Cure monitoring
  • Monitoring the degradation/aging

Mapping the homogenety of permittivity

  • Identifying local curing defects
  • Finding local damages / inclusions
  • Analyzing the texture of GFRP

Quantitative permittivity control (via calibration)

  • Measuring the permittivity
  • Determining bulk material composition e.g. resin content of composite
  • Dielectric layer characterization
Carbon fiber texture analysis
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Complementary Sensors for Contour and Delamination Testing

In addition to the eddy current-based sensors, the system can be equipped with laser profile sensors or ultrasonic transducers allowing to combine the advantages of each technology.

The laser profile sensor is ideal to measure surface roughness (topography) and contour. The line profile covers a large area of up to 100 mm length by scanning at vertical high resolution. This approach reveals information on loose stacks, fuzzy fringes, etc. in addition to the information on the inner texture of the sample captured by the EddyCus sensor.

 

SURAGUS hybrid systems with combined eddy-current and ultrasonic sensors, require a coupling media, but they complete the EddyCus solution by providing exact insights on delamination, porosity, cracks and inclusions. The eddy current sensors are fully ingress-protected and can be used in a water bath. It is also possible to integrate them to existing gantries for ultrasonic testing systems and to analyze the scan with the powerful SURAGUS EddyEVA software.

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