A unified constrained inversion model for ultrasonic flaw sizing
Tóm tắt
Equivalent flaw sizing using ultrasonic waves is an approach whereby shape and orientation information of a defect are obtained in terms of a best-fit simple geometry that is able to represent the major aspects of the flaw. Separate examples of this approach have previously been developed for volumetric flaws and cracks using the Born and Kirchhoff approximations, respectively. Here, these separate algorithms are unified into a single algorithm capable of sizing both volumetric flaws and cracks. Some examples of the performance of this unified algorithm on both synthetic and experimental data are also given.
Tài liệu tham khảo
J. Krautkramer and H. Krautkramer.Ultrasonic Testing of Materials. Springer-Verlag, New York (1977)
G.P. Singh and S. Udpa.NDT Int. 19:125 (1986)
D.O. Thompson, S.J. Wormley, and D.K. Hsu.Rev. Sci. Inst. 57:3089 (1986)
A. Sedov and L.W. Schmerr.Wave Motion 8:15 (1986)
L.W. Schmerr and A. Sedov.J. NDE.5:37 (1985)
A. Sedov and L.W. Schmerr.SIAM J. Appl. Math. 47:1201
J.E. Gubernatis, E. Domany, J.A. Krumhansl, and M. Hubermann.J. Appl. Phys. 48:2812 (1977)
J.H. Rose and J.M. Richardson.J. NDE.3:45 (1982)
R.P. Kanwal.Comp. & Struct. 16:471 (1983)
J.E. Gubernatis, E. Domany, and J.A. Krumhansl. Report LA-UR-79-2393, Los Alamos Scientific Laboratory, New Mexico (1979)
J.E. Gubernatis, E. Domany, and J.A. Krumhansl.J. Appl. Phys. 48:2804 (1977)
R.B. Thompson and T.A. Gray.J. Acoust. Soc. Am. 74:1279 (1983)
T.A. Gray, R.B. Thompson, and B.P. Newberry. InReview of Progress in Quantitative Nondestructive Evaluation, 4A, edited by D.O. Thompson and D.E. Chimenti, p. 11. Plenum, New York (1985)
M.F. Whalen, L.J. O'Brien, and A.N. Mucciardi. InProceedings of the DARPA/AFWAL Review of Progress in Quantitative NDE, Technical Report AFWAL-TR-80-4078, edited by D.O. Thompson and R.B. Thompson, p. 482. Materials Laboratory, Wright-Patterson AFB, Ohio (1980)
M.F. Whalen, P.M. Garafola, L.J. O'Brien, and A.N. Mucciardi. InProceedings of the DARPA/AFWAL Review of Progress in Quantitative NDE, Technical Report AFWAL-TR-81-4078, edited by R.B. Thompson and P.M. Beckman, p. 405. Materials Laboratory, Wright-Patterson AFB, Ohio (1981)
L.W. Schmerr, K.E. Christensen, and S.M. Nugen. InReview of Progress in Quantitative Nondestructive Evaluation, 6A, edited by D.O. Thompson and D.E. Chimenti, p. 879. Plenum, New York (1988)
S.M. Nugen, K.E. Christensen, L.W. Schmerr, and L.S. Koo. InReview of Progress in Quantitative Nondestructive Evaluation, 7A, edited by D.O. Thompson and D.E. Chimenti, p. 445. Plenum, New York (1988)
J.H. Rose and J.L. Opsal. InReview of Progress in Quantitative Nondestructive Evaluation, 2B, edited by D.O. Thompson and D.E. Chimenti, p. 949. Plenum, New York (1988)
D.K. Hsu, J.H. Rose, and D.O. Thompson.J. Appl. Phys. 55:162 (1984)
R.B. Thompson. InReview of Progress in Quantitative Nondestructive Evaluation, 4A, edited by D.O. Thompson and D.E. Chimenti, p. 611. Plenum, New York (1985)
C. Chaloner and L.J. Bond.IEEE Proc. 134(A):257 (1987)
Cohen-Tenoudji, Y. Pralus, A. Lambert, G. Quentin, and B.R. Tittman. InReview of Progress in Quantitative Nondestructive Evaluation, 3A, edited by D.O. Thompson and D.E. Chimenti, p. 359. Plenum, New York (1984)
L.S. Koo, “Ultrasonic Flaw Classification: An Approach Using Modeling, Signal Processing, and Adaptive Learning,” Ph.D. Thesis (unpublished), Iowa State University, 1987
K.C. Tam,J. NDE.5:95 (1985)
R. Fletcher.Practical Methods of Optimization, Vol. 1. Wiley, New York (1980)
C.-P. Chiou. “Nonlinear Optimization Algorithm for Ultrasonic Crack Characterization: Simulation and Testing Studies,” M.S. Thesis (unpublished), Iowa State University, 1986