Markus Winklberger, Christoph Kralovec, Peter Heftberger, Martin Schagerl,
"Crack size monitoring in necked double shear lugs using the electro-mechanical impedance method"
: SPIE Smart Structures + Nondestructive Evaluation, Serie Health Monitoring of Structural and Biological Systems XV, Vol. 11593, International Society for Optics and Photonics, Seite(n) 115930B, 2021
Crack size monitoring in necked double shear lugs using the electro-mechanical impedance method
Sprache des Titels:
SPIE Smart Structures + Nondestructive Evaluation
Artificially introduced cracks in necked double shear lugs are monitored using piezoelectric transducers attached to the lug shaft and analyzed by the electro-mechanical impedance (EMI) method with a model-based approach. Numerical simulations with coupled-field finite element (FE) models are used to study the frequency response behavior of necked lugs. Through-cracks with lengths up to 3 mm are located at 90° to the lug axis, which is a critical spot for damage initiation. The shift of a selected resonance frequencies found by analytical and numerical calculations are used to estimate the crack length. Results of numerical FE simulations are validated with multiple experimental measurements.
Sprache der Kurzfassung:
International Society for Optics and Photonics
Health Monitoring of Structural and Biological Systems XV