Article Article
NDE of Adhesively Bonded CFRP-Aluminum Lap Joints Using Acoustography

This paper examines the application of through-transmission ultrasonic (TTU) Acoustography NDE to detect and quantify the bondline defects in adhesively bonded carbon fiber reinforced plastics-Aluminum (CFRP-Al) lap joints. The bondline defects in CFRP-Al lap joints were simulated by introducing a xylene based degreaser on the bonding surface of 2024-T3 Aluminum by percentage surface area. The percentage surface area contaminated ranged from 25% to 75%. The TTU Acoustography method, operating at 5 MHz, was able to detect the surface contaminant in the bondline. The in-plane tensile test result for the sample with and without contamination showed an interesting phenomena, i.e. higher levels of surface contamination failed at higher loads compared to baseline noncontaminated sample.

References
  1. Pocius, A. V., Dillard, D. A., and Chaudhury, M. K., 2002, Adhesion Science and Engineering-I, Elsevier, Amsterdam, The Netherlands.
  2. Jeenjitkaew, C., Luklinska, Z., and Guild, F., 2010, "Morphology and Surface Chemistry of Kissing Bonds in Adhesive Joints Produced by Surface Contamination," International Journal of Adhesion and Adhesives, 30(7), pp. 643-653.
  3. Marty, P. N., Desai, N., and Anderson, J., "NDT of Kissing Bond in Aeronautical Structures," Proc. 16th WCNDT 2004, www.ndt.net.
  4. Waugh, R. C., Dulieu-Barton, J. M., and Quinn, S., 2011, "Pulse Phase Thermography and its Application to Kissing Defects in Adhesively Bonded Joints," Advances in Experimental Mechanics Viii, 70, pp. 369-374.
  5. Seelenbinder, J., 2011, "Detection of trace contamination on metal surfaces using the handheld Agilent 4100 ExoScan FTIR," Agilent Technologies, Connecticut.
  6. Bossi, R. H., and Nerenberg, R. L., 2000, "Quality Assurance for Composite Bonding," Bridging the Centuries with Sampe's Materials and Processes Technology, Vol 45, Books 1 and 2, pp. 1787-1799.
  7. Nagy, P. B., 1991, "Ultrasonic Detection of Kissing bonds at Adhesive Interfaces," Journal of Adhesion Science and Technology, 5(8), pp. 619-630.
  8. Brotherhood, C. J., Drinkwater, B. W., and Guild, F. J., 2002, "The Effect of Compressive Loading on The Ultrasonic Detectability of Kissing Bonds in Adhesive Joints," Journal of Nondestructive Evaluation, 21(3), pp. 95-104.
  9. Kundu, T., Maji, A., Ghosh, T., and Maslov, K., 1998, "Detection of Kissing Bonds by Lamb Waves," Ultrasonics, 35(8), pp. 573-580.
  10. Bossi, R., Housen, K., and Shepherd, W., 2002, "Using Shock Loads to Measure Bonded Joint Strength," Materials Evaluation, 60(11), pp. 1333-1338.
  11. Bossi, R., Housen, K., Walters, C. T., and Sokol, D., 2009, "Laser Bond Testing," Materials Evaluation, 67(7), pp. 819-827.
  12. Michaloudaki, M., Lehmann, E., and Kosteas, D., 2005, "Neutron Imaging as a Tool for the Non-destructive Evaluation of Adhesive Joints in Aluminium," International Journal of Adhesion and Adhesives, 25(3), pp. 257-267.
  13. Heslehurst, R. B., 1999, "Observations in the structural response of adhesive bondline defects," International Journal of Adhesion and Adhesives, 19(2-3), pp. 133-154.
  14. Sandhu, J. S., Wang, H. H., Popek, W., and Sincebaugh, P. J., "Acoustography: It Could Be A Practical Ultrasonic NDE Tool For Composites," Proc. Proceedings for the Conference on Nondestructive Evaluation of Aging Materials and Composites IV, pp. 129-134.
  15. Sandhu, J. S., Wang, H. H., Popek, W. J., and Sincebaugh, P. J., "Development of Acoustography for NDE of Aging Structures," Proc. Proceedings for the Conference on Advanced Nondestructive Evaluation for Structural and Biological Health Monitoring, pp. 95-99.
  16. Sandu, J. S., "Acoustography: A New Imaging Technique and its Application to Nondestructive Evaluation," Proc. Materials Evaluation. 7
  17. International, A., 1995, "ASTM D2651-90, Standard Guide for Preparation of Metal Surfaces for Adhesive Bonding," www.astm.org, West Conshohocken.
  18. Vaillancourt, A., and Abele, T., 2010, "Ashesive Technology: Surface Preparation Techniques on Aluminum," Worcester Polytechnical Institute, Worcester.
  19. ASTM D5868 - 01, "Standard Test Method for Lap Shear Adhesion for Fiber Reinforced Plastic (FRP) Bonding," 2014, www.astm.org, West Conshohocken, PA.
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