Experimental and Numerical Investigation of Jump Phenomena in the Frequency Response of Piezoelectric Systems
O. Friesen, J. Hölscher, M.B.K. Siegmund, L. Claes, B. Henning, in: 96th Annual Meeting of the International Association of Applied Mathematics and Mechanics (GAMM), 2026.

Measurement of multiphysical material parameters of piezoceramic components for high-power ultrasonic applications
O. Friesen, L. Claes, J. Hölscher, B. Henning, C. Scheidemann, T. Hemsel, R. Kuess, A. Walther, C. Spieker, J. Förstner, Tm - Technisches Messen (2026).

Quantitative Modelling of Dynamic Nonlinearity in Piezoelectric Components
O. Friesen, J. Hölscher, C. Spieker, J. Förstner, L. Claes, in: 2026.

Estimation of third order elastic constants of piezoceramics using DC biased impedance measurements
L. Claes, J. Hölscher, O. Friesen, C. Scheidemann, T. Hemsel, B. Henning, in: 2025 International Congress on Ultrasonics, AMA Service GmbH, Paderborn, 2025, pp. 142–145.

Machine Learning-Supported Inverse Measurement Procedure for Broadband, Temperature Dependent Piezoelectric Material Parameters
L. Claes, K. Koch, O. Friesen, L. Meihost, Acta Acustica 9 (2025).

Sensitivity Analysis and Material Parameter Estimation of a Pre-Stressed Langevin Transducer
O. Friesen, C. Scheidemann, L. Claes, T. Hemsel, B. Henning, in: 2025 International Congress on Ultrasonics, AMA Service GmbH, Paderborn, 2025, pp. 138–141.

Identification of temperature-dependent material parameter functions in piezoelectricity
R. Kuess, O. Friesen, B. Henning, A. Walther, in: 2025 International Congress on Ultrasonics, AMA Service GmbH, Germany, 2025, pp. 134–137.

Estimation of piezoelectric material parameters under varying electric field conditions
O. Friesen, L. Meihost, K. Koch, L. Claes, B. Henning, in: 2025.

Multiscale thermo-piezoelectric simulations using the finite element method
J. Hölscher, O. Friesen, L. Claes, C. Spieker, J. Förstner, B. Henning, in: 2025 International Congress on Ultrasonics, AMA Service GmbH, Paderborn, 2025, pp. 130–133.

Estimation of temperature-dependent piezoelectric material parameters using ring-shaped specimens
O. Friesen, L. Claes, C. Scheidemann, N. Feldmann, T. Hemsel, B. Henning, in: 2023 International Congress on Ultrasonics, Beijing, China, IOP Publishing, 2024, p. 012125.

Randomised material parameter impedance dataset of piezoelectric rings
K. Koch, O. Friesen, L. Claes, Randomised Material Parameter Impedance Dataset of Piezoelectric Rings, Zenodo, 2024.

Machine learning in inverse measurement problems: An application to piezoelectric material characterisation
L. Claes, K. Koch, O. Friesen, L. Meihost, Machine Learning in Inverse Measurement Problems: An Application to Piezoelectric Material Characterisation, International Workshop on Piezoelectric Materials and Applications (IWPMA), 2024.

Estimation of piezoelectric material parameters of ring-shaped specimens
O. Friesen, L. Claes, N. Feldmann, B. Henning, Tm - Technisches Messen (2024).

Untersuchung piezoelektrischer Materialeigenschaften unter hydrostatischer Last
O. Friesen, M.A. Pasha, M. Schwengelbeck, L. Claes, E. Baumhögger, B. Henning, in: Fortschritte der Akustik - DAGA 2024, 2024, pp. 1117–1120.

Investigation of change in dispersive behaviour during adhesive curing in multi-layered structures
H. Zeipert, C. von Germeten, O. Friesen, L. Claes, S. Johannesmann, B. Henning, in: Fortschritte Der Akustik - DAGA 2023, 2023, pp. 819–822.

Influence of Temperature and Pre-Stress on the Piezoelectric Material Behavior of Ring-Shaped Ceramics
C. Scheidemann, T. Hemsel, O. Friesen, L. Claes, W. Sextro, in: 2023.

Estimation of piezoelectric material parameters of ring-shaped specimens
O. Friesen, L. Claes, N. Feldmann, B. Henning, Estimation of Piezoelectric Material Parameters of Ring-Shaped Specimens, International Workshop on Piezoelectric Materials and Applications in Actuators (IWPMA), 2022.