Monitoring cure of composite resins using frequency dependent electromagnetic sensing techniquesA nondestructive in situ measurement technique has been developed for monitoring and measuring the cure processing properties of composite resins. Frequency dependent electromagnetic sensors (FDEMS) were used to directly measure resin viscosity during cure. The effects of the cure cycle and resin aging on the viscosity during cure were investigated using the sensor. Viscosity measurements obtained using the sensor are compared with the viscosities calculated by the Loos-Springer cure process model. Good overall agreement was obtained except for the aged resin samples.
Kranbuehl, D. E. (College of William and Mary Williamsburg, VA, United States)
Hoff, M. S. (College of William and Mary Williamsburg, VA, United States)
Loos, A. C. (Virginia Polytechnic Institute and State University Blacksburg, United States)
Freeman, W. T., Jr. (NASA Langley Research Center Hampton, VA, United States)
Eichinger, D. A. (College of William and Mary Williamsburg, VA, United States)