Crack size monitoring in necked double shear lugs using the electro-mechanical impedance method

Markus Winklberger; Christoph Kralovec; Peter Heftberger; Martin Schagerl

doi:10.1117/12.2583208

22 March 2021 Crack size monitoring in necked double shear lugs using the electro-mechanical impedance method

Markus Winklberger, Christoph Kralovec, Peter Heftberger, Martin Schagerl

Proceedings Volume 11593, Health Monitoring of Structural and Biological Systems XV; 115930B (2021) https://doi.org/10.1117/12.2583208
Event: SPIE Smart Structures + Nondestructive Evaluation, 2021, Online Only

Abstract

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 .

Conference Presentation

Citation Download Citation

Markus Winklberger, Christoph Kralovec, Peter Heftberger, and Martin Schagerl "Crack size monitoring in necked double shear lugs using the electro-mechanical impedance method", Proc. SPIE 11593, Health Monitoring of Structural and Biological Systems XV, 115930B (22 March 2021); https://doi.org/10.1117/12.2583208

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