@inproceedings{f9ffb5da87b44eec889dbfacf978bbdf,
title = "Nonlinear ultrasonic characteristics: Identification and use for damage prognosis",
abstract = "This work aims at the development of system interrogation parameters that are highly sensitive to damage accumulation from the earliest stages of the fatigue process. The approach taken is to develop a nonlinear parameter that is based on a quantification of the level of the nonlinear relation between the excitation and its harmonic rather than on their spectral amplitudes. Ultrasonic measurements are performed on a 7075 aluminum specimen after equal intervals of loading cycles that ended with its failure. Higher-order spectral moments are used to quantify the extent of nonlinear coupling between the excitation and its harmonic and develop a nonlinear parameter for the ultrasonic wave propagation. Variations in the value of this parameter with the number of cycles are determined. An explanation for these variations is presented.",
author = "Hajj, {M. R.} and Duke, {J. C.} and B. Yoo",
year = "2006",
doi = "10.2514/6.2006-2242",
language = "English",
isbn = "1563478080",
series = "Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference",
pages = "7740--7746",
booktitle = "Collection of Technical Papers - 47th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference",
note = "47th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference ; Conference date: 01-05-2006 Through 04-05-2006",
}