Mode I tests of Norway spruce using SEN-TPB: detailed analysis of the crack length determined using optical method

0575789 - ÚTAM 2024 RIV US eng C - Konferenční příspěvek (zahraniční konf.)
Hataj, M. - Kunecký, Jiří - Kloiber, Michal
Mode I tests of Norway spruce using SEN-TPB: detailed analysis of the crack length determined using optical method.
WCTE 2023. Proceedings from the 13th World conference on timber engineering. Red Hook (NY): Curran Associates, 2023 - (Nyrud, A.; Malo, K.; Nore, K.), s. 162-167. ISBN 9781713873273.
[World conference on timber engineering. WCTE /13./. Oslo (NO), 19.06.2023-22.06.2023]
Grant CEP: GA ČR(CZ) GA21-29389S
Institucionální podpora: RVO:68378297
Klíčová slova: SEN-TPB * Norway spruce * digital image correlation * strain energy release rate * crack length
Obor OECD: Construction engineering, Municipal and structural engineering
https://doi.org/10.52202/069179-0022

The paper deals with characterization of fracture properties of Norway spruce using SEN-TPB test. Although the matter is not new, methods of processing the results are relatively recent. The article focuses on determination of crack length using DIC, however, the core of the work is the algorithm which determines the crack length based on the correlated point data. Results of optical measurement are compared to compliance-based analytical formulas. Altogether 18 experiments in radial orientation have been made. Samples used for determination of the strain energy release rate were 60 mm in width and 120 mm in height. Wider specimens have been used to employ the orientation of anatomical directions of the tested timber. Two cameras were used to track cracks on both sides. The algorithm works well, although interesting questions arise, especially when we look at the crack length determination algorithm and its failure criteria.
Trvalý link: https://hdl.handle.net/11104/0345512