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Stress and strain determination during piezoelectric resonance using digital image correlation
Lovro Fulanovic1, Hendrik Pulju2, Jurij Koruza1
1Institute for Chemistry and Technology of Materials, Graz University of Technology, 8010 Graz, Austria.
Ultrasonics
|May 20, 2026
Summary
Digital Image Correlation (DIC) non-contact measurements reveal detailed strain and stress in vibrating piezoceramics. This advanced technique provides crucial full-field data for optimizing resonance piezoelectric applications.
Area of Science:
- Materials Science
- Mechanical Engineering
- Solid Mechanics
Background:
- Accurate characterization of deformation, stress, and strain under high-frequency vibration is critical for resonance piezoelectric applications.
- Conventional methods often lack full-field data and require physical contact, limiting their effectiveness.
- Understanding material behavior during resonance is essential for device performance and reliability.
Purpose of the Study:
- To introduce and validate a novel Digital Image Correlation (DIC) approach for measuring displacement, strain, and stress in piezoceramics under resonance conditions.
- To overcome the limitations of conventional electrical or point-based measurement techniques.
- To provide comprehensive, non-contact, full-field data for piezoceramic characterization.
Main Methods:
- Utilized a stroboscopic Digital Image Correlation (DIC) setup for non-contact, full-field displacement mapping.
- Achieved measurement frequencies up to 265 kHz with a displacement sensitivity better than 50 nm.
- Applied the method to analyze transverse (31) and longitudinal (33) vibration modes of lead zirconate titanate (Pb(Zr,Ti)O3) ceramics.
Main Results:
- Demonstrated heterogeneous strain and stress distributions within the piezoceramic samples during resonance.
- Observed strain and stress profiles were consistent with analytical predictions and finite element modeling (FEM) results.
- Successfully visualized and quantified full-field strain and stress under high-frequency vibration.
Conclusions:
- Digital Image Correlation (DIC) is established as an effective tool for experimental characterization of piezoelectric materials.
- The non-contact, full-field approach provides superior data compared to conventional methods for resonance analysis.
- This technique enables precise visualization and quantification of stress and strain, crucial for optimizing piezoelectric device performance.
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