In this investigation, a T-shaped aluminum alloy isogrid stiffener element used in aerospace applications was tested with ultrasonic phased array techniques. The isogrid stiffener element had various crack configurations emanating from bolt holes. Computational simulation methods were used to mimic the experiments in order to help
understand experimental results. The results of this study indicate that it is at least partly feasible to interrogate this type of geometry with the given discontinuity configurations using phased array ultrasonics. The simulation methods were critical in helping explain the experimental results and, with some limitation, can be used to predict testing results.
Achenbach, J.D., Wave Propagation in Elastic Solids, Amsterdam, North
Achenbach, J.D., “Measurement Models for Quantitative Ultrasonics,”
Journal of Sound and Vibration, Vol. 159, 1992, pp. 385–401.
Aldrin, J.C. and J.S. Knopp, “Modeling and Simulation for Nondestructive
Testing with Applications to Aerospace Structures,” Materials Evaluation,
Vol. 66, 2008, pp. 53–59.
Aldrin, J., J.D. Achenbach, G. Andrew, C. P’an, B. Grills, R.T. Mullis, F.W.
Spencer and M. Golis, “Case Study for the Implementation of an Automated
Ultrasonic Technique to Detect Fatigue Cracks in Aircraft Weep
Holes,” Materials Evaluation, Vol. 59, 2001, pp. 1313–1319.
ASNT, Nondestructive Testing Handbook, second edition: Volume 7, Ultrasonic
Testing, Columbus, Ohio, American Society for Nondestructive
Buttram, Jonathan, ed., Technical Focus Issue on Ultrasonic Phased
Arrays, Materials Evaluation, Vol. 65, No. 1, January 2007.
Chaffai-Gargouri, S., S. Chatillon, S. Mahaut and L. Le Ber, “Simulation
and Data Processing For Ultrasonic Phased-Arrays Applications,” Review of
Progress in Quantitative Nondestructive Evaluation, Vol. 26A, D.O.
Thompson and D.E. Chimenti, eds., Melville, New York, AIP, 2007, pp.
Cinquin, M., L. Le Ber, S. Lonne and S. Mahaut, “Results of 2006 UT
Modeling Benchmark Obtained with CIVA at CEA: Beam Modeling and
Flaw Signal Prediction,” Review of Progress in Quantitative Nondestructive
Evaluation, Vol. 26B, D.O. Thompson and D.E. Chimenti, eds., Melville,
New York, AIP, 2007, pp. 1870–1877.
Darmon, M., P. Calmon and C. Bele, “Modeling of the Ultrasonic
Response of Inclusions in Steels,” Review of Progress in Quantitative Nondestructive
Evaluation, Vol. 22A, D.O. Thompson and D.E. Chimenti, eds.,
Melville, New York, AIP, 2003, pp. 101–108.
Gengembre, N., “Pencil Method for Ultrasonic Beam Computation,” Fifth
World Congress on Ultrasonics, Paris, 2003.
Lonne, S., L. de Roumilly, L. Le Ber, S. Mahaut and G. Cattiaux, “Experimental
Validation of CIVA Ultrasonic Simulations,” International Conference
on NDE in Nuclear Industry (ICNDE), San Diego, 2006.
Mahaut, S., S. Chatillon, E. Kerbrat, J. Porré, P. Calmon and O. Roy, “New
Features for Phased Array Techniques Inspections: Simulation and Experiments,”
16th World Conference on Non-Destructive Testing, Montreal,
NASA, Isogrid Design Handbook, NASA CR-124075, Rev. A, Huntington
Beach, California, McDonnell Douglas, 1973.
NASA, Atlas V Expendable Launch Vehicle (ELV) Rocket Propellant (RP)-1
Qualification Tank Failure Independent Assessment, NASA Engineering and
Safety Center, RP-08-85, v1.1, 2008 (ITAR-restricted document).
Olympus, Advances in Phased Array Ultrasonic Technology Applications,
Waltham, Massachusetts, Olympus, 2007.
Raillon, R. and I. Lecoeur-Taïbi, “Transient Elastodynamic Model for
Beam Flaw Interaction. Application to Nondestructive Testing,” Ultrasonics,
Vol. 38, 2000, pp. 527–530.
Rose, J.L., Ultrasonic Waves in Solid Media, Cambridge, Cambridge University
Roth, D.J., J.D. Kiser, S.M. Swickard, S. Szatmary and D. Kerwin, “Quantitative
Mapping of Pore Fraction Variations in Silicon Nitride Using an
Ultrasonic Contact Scan Technique,” Research in Nondestructive Evaluation,
Vol. 6, 1995, pp. 125–168.
Roth, D.J., R.P. Tokars, R.E. Martin, R.W. Rauser, J.C. Aldrin and E.J.
Schumacher, “Ultrasonic Phased Array Inspection Simulations of Welded
Components at NASA,” Materials Evaluation, Vol. 67, 2009, pp. 60–65.
Schmerr, L.W., Fundamentals of Ultrasonic Nondestructive Evaluation – A
Modeling Approach, New York, Plenum, 1998.