TY - JOUR
T1 - Nonlinear elastic wave spectroscopy (NEWS) techniques to discern material damage, Part I
T2 - Nonlinear wave modula-tion spectroscopy (NWMS)
AU - Den Abeele, K. E.A.Van
AU - Johnson, P. A.
AU - Sutin, A.
PY - 2000
Y1 - 2000
N2 - The level of nonlinearity in the elastic response of materials containing structural damage is far greater than in materials with no structural damage. This is the basis for nonlin-ear wave diagnostics of damage, methods which are remarkably sensitive to the detection and progression of damage in materials. Nonlinear wave modulation spectroscopy (NWMS) is one exemplary method in this class of dynamic nondestructive evaluation techniques. The method focuses on the application of harmonics and sum and difference frequency to discern damage in materials. It consists of exciting a sample with continuous waves of two separate frequencies simultaneously, and inspecting the harmonics of the two waves, and their sum and difference frequencies (sidebands). Undamaged materials are essentially linear in their response to the two waves, while the same material, when damaged, becomes highly nonlinear, manifested by har-monics and sideband generation. We illustrate the method by experiments on uncracked and cracked Plexiglas and sandstone samples, and by applying it to intact and damaged engine com-ponents.
AB - The level of nonlinearity in the elastic response of materials containing structural damage is far greater than in materials with no structural damage. This is the basis for nonlin-ear wave diagnostics of damage, methods which are remarkably sensitive to the detection and progression of damage in materials. Nonlinear wave modulation spectroscopy (NWMS) is one exemplary method in this class of dynamic nondestructive evaluation techniques. The method focuses on the application of harmonics and sum and difference frequency to discern damage in materials. It consists of exciting a sample with continuous waves of two separate frequencies simultaneously, and inspecting the harmonics of the two waves, and their sum and difference frequencies (sidebands). Undamaged materials are essentially linear in their response to the two waves, while the same material, when damaged, becomes highly nonlinear, manifested by har-monics and sideband generation. We illustrate the method by experiments on uncracked and cracked Plexiglas and sandstone samples, and by applying it to intact and damaged engine com-ponents.
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U2 - 10.1080/09349840009409646
DO - 10.1080/09349840009409646
M3 - Article
AN - SCOPUS:0033740007
SN - 0934-9847
VL - 12
SP - 17
EP - 30
JO - Research in Nondestructive Evaluation
JF - Research in Nondestructive Evaluation
IS - 1
ER -