Article Article
Bond Interface Evaluation of Solid Woven Carbon Fiber Composite onto Aluminum Alloys

Solid woven carbon fiber reinforced plastic (CFRP) consists of two or more components. The constituents retain their individual material properties in the composite matrix at the macroscopic level. Generally, one of the materials acts as a reinforcing agent and the other constituent serves as a polymeric binder for the carbon weave. The binder also creates covalent bonds between the composite and metal surface. All composites and metal-to-composite interfaces contain voids and micro-cracks. These manufacturing anomalies result in higher ultrasonic noise signals in the A scans. The B and C-scans produce a textured appearance. The interaction of sound dispersion and absorption within the composite makes the bondline interface between reinforced plastic and metal more difficult to evaluate. This paper explores nondestructive inspection techniques to evaluate the bondline and documents the elastic wave scattering through the metal-to-composite interface. A summary of the detection and analysis techniques developed to identify: lack of bonding and porosity levels within a solid laminate and bondline are presented.

  1. Siver, A., “Mechanistic Effects of Porosity on Structural Composite Materials”, University of California Los Angeles, Master’s Thesis, Mechanical Engineering, August 2014
  2. Thompson, R. B., Gray T. A., “ A Model Relating Ultrasonic Scattering Measurements Through Liquid-Solid Interfaces to Unbounded Medium Scattering Amplitudes”, Ames Laboratory, USDOE, Iowa State University, Ames, Iowa, American Journal Acoustics Society, Volume 74, October 4, 1983.
  3. Sayers C. M., Smith R. L., “The Propagation of Ultrasonic Sound in Porous Media”, Butterworth & Company, Ultrasonics, September 1982.
  4. Bar-Cohen Y, Mal, A. K., Yin, C. C., “Ultrasonic Evaluation of Adhesive Bonding”, Journal of Adhesives, 1989, Volume 29, pp. 237–74.
  5. Rokhlin S. I., Wang W, Wang YJ. In: Thompson D. O., Chimenti D. E., editors. “Ultrasonic Evaluation of Interphasial Properties in Adhesive Joints”, Review of Progress in Quantitative NDE, New York: Plenum Press; 1990, p.p. 1231–1238.
  6. Wang W, Rokhlin S. I., “Evaluation of Interfacial Properties in Adhesive Joints of Aluminum using Anglebeam Ultrasonic Spectroscopy”, Journal of Adhesives and Science Technology 1991; Volume 5(8) p.p.647–66.
  7. Hagemaier D. J., “Automated Ultrasonic Inspection of Adhesive Bonded Structure”, Materials Evaluation, American Society for Nondestructive Testing, Columbus, Ohio, 1982; Volume 40 (April) p.p. 572–8.
  8. Reynolds, W. N., Wilkinson, S. J., “The Analysis of Fibre-reinforced Porous Composite Materials by the Measurement of Ultrasonic Wave Velocities”, Nondestructive Centre, AERE Harwell, Didcot Oxfordshire, United Kingdom, Ultrasonics, IPC Press, July, 1978.
Usage Shares
Total Views
52 Page Views
Total Shares
0 Tweets
0 PDF Downloads
0 Facebook Shares
Total Usage