TY - JOUR
T1 - Micro-and macroscale damage detection using the nonlinear acoustic vibro-modulation technique
AU - Zagrai, Andrei
AU - Donskoy, Dimitri
AU - Chudnovsky, Alexander
AU - Golovin, Edward
PY - 2008/4
Y1 - 2008/4
N2 - Subjected to in-service and environmental loads, even relatively new structural components may reveal signs of microscopic deterioration. Very often, this initial damage further progresses into meso- and macroscales leading to development of one or several macrocracks that cause ultimate structural failure. Although the onset of macroscale cracking can be reliably detected by modern NDE methodologies, there is an increasing need for inspection technologies that may allow for assessing structural damage at a wide range of scales, i.e., from micro to macro. This article explores application of the nonlinear acoustic vibro-modulation technique (VMT) to incipient damage detection and monitoring. The nonlinear acoustic detection of the macroscopic damage is illustrated with examples: inspection of the cast aluminum automotive parts and testing of the aging aircraft fuselage. The microscale damage assessment is realized by real-time monitoring of the acoustic nonlinearity in the strain controlled three-point-bending fatigue test. In the experiment, a stable increase of the nonlinear response during specimen fatigue was observed indicating early damage accumulation before the macroscopic fracture.
AB - Subjected to in-service and environmental loads, even relatively new structural components may reveal signs of microscopic deterioration. Very often, this initial damage further progresses into meso- and macroscales leading to development of one or several macrocracks that cause ultimate structural failure. Although the onset of macroscale cracking can be reliably detected by modern NDE methodologies, there is an increasing need for inspection technologies that may allow for assessing structural damage at a wide range of scales, i.e., from micro to macro. This article explores application of the nonlinear acoustic vibro-modulation technique (VMT) to incipient damage detection and monitoring. The nonlinear acoustic detection of the macroscopic damage is illustrated with examples: inspection of the cast aluminum automotive parts and testing of the aging aircraft fuselage. The microscale damage assessment is realized by real-time monitoring of the acoustic nonlinearity in the strain controlled three-point-bending fatigue test. In the experiment, a stable increase of the nonlinear response during specimen fatigue was observed indicating early damage accumulation before the macroscopic fracture.
KW - Damage detection
KW - Micro-scale damage
KW - Nondestructive
KW - Nonlinear acoustics
KW - Prognosis
KW - Structural health monitoring
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U2 - 10.1080/09349840801931817
DO - 10.1080/09349840801931817
M3 - Article
AN - SCOPUS:42649107171
SN - 0934-9847
VL - 19
SP - 104
EP - 128
JO - Research in Nondestructive Evaluation
JF - Research in Nondestructive Evaluation
IS - 2
ER -