Proceedings of 41st Danubia-Adria Symposium Advances in Experimental Mechanics (pp. 41-42)
AUTOR(I) / AUTHOR(S): Thomas Lehmann 
, Tobias Jähnichen, Jörn Ihlemann
DOI: 10.46793/41DAS2025.041L
UVOD / INTRODUCTION:
Strain analysis is of particular importance in experimental mechanics. For the measurement of very small strains, strain gages are often used due to their outstanding precision and accuracy. Thus, the calibration of strain gages (gage factor determination) is to be done considering high requirements. Therefore, a four-point bending setup is suitable due to the clear defined strain distribution in the analyzing section, where the strain gages are applied. The determination of the test strain is of particular importance here. In this contribution, two different measurement methods – using displacement transducers and 3D digital image correlation (DIC) – are applied for the determination of the test strain and compared. The DIC strain evaluation used here deviates from the method based on spline approximation of the displacements or coordinates.
KLJUČNE REČI / KEYWORDS:
PROJEKAT / ACKNOWLEDGEMENT:
LITERATURA / REFERENCES:
- VDI/VDE standard 2635-1. Experimental structure analysis – Metallic bonded resistance strain gauges – Characteristics and testing conditions, 2024.
- Bergqvist, B. Equipment for highly accurate and repeatable strain gauge factor determination. Strain, 1972, 8(4), 170–176.
- Lehmann, T., Ihlemann, J. DIC deformation analysis using B-spline smoothing with consideration of characteristic noise properties. Mater Today-Proc, 2022, 62(5), 2549–2553.