.png){kind=icon}
.png){kind=icon}
Return
Decoupling fatigue micro-crack orientation and length via one-way collinear bulk-wave mixing with a linear receiver array
.png){kind=icon}
OA
AI
Z
X
N
X
Z
L
P
M
Y
DOI：10.1080/10589759.2026.2683616.png)
.png){kind=icon}
Original request for help.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
Quantitative characterisation of closed fatigue micro-cracks under single-sided inspection constraints remains challenging due to the signal coupling between micro-crack orientation and length. To resolve this, this paper proposes a one-way collinear bulk-wave mixing method assisted by a linear receiver array. Finite element (FE) simulations first determine a critical transmission-side collinearity offset between the two transmitting transducers, establishing a geometric constraint that strictly preserves the monotonicity of the summed difference-frequency (DF) amplitude. Subsequently, a dual-metric identification framework is developed, integrating a mirror-asymmetry coefficient to characterise the spatial distribution of the DF response, and a normalised summed DF amplitude to evaluate its overall intensity. This strategy effectively decouples orientation information from micro-crack length. Experimental validation demonstrates that the proposed method accurately estimates geometric parameters, limiting orientation errors to within ±8° and length errors to below 19%, confirming its reliability for precise in-service non-destructive evaluation.
Keywords:
Nonlinear ultrasonics
wave mixing
linear receiver array
micro-cracks
quantitative characterisation
Journal
N
IF:
4.2
Papers:
1.7K
Citations:
2.1K
Organization
Cited Papers