Thickness-independent fracture in columnar freshwater ice : An experimental study

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2024-03-08
Major/Subject
Mcode
Degree programme
Language
en
Pages
8
Series
Engineering Fracture Mechanics, Volume 298
Abstract
Experiments on columnar freshwater ice indicated that there is no detected effect of the ice thickness on the fracture behavior of columnar freshwater S2 ice. The influence of thickness was studied using large laboratory-grown samples. Two series of Mode I fracture tests were carried out using deeply edge-cracked 3-by-6-metre rectangular plates loaded monotonically at 1…100 μm/s. The ice was warm (above −0.5 °C), and the ice thickness varied in the range 10–40 cm. This paper analyzes the second series of tests and compares the results with the first series tests; the analysis of the latter was published in Gharamti et al. (2021) [2,3,4]. The viscoelastic fictitious crack model (VFCM) was applied to analyze the data and calculate the crack profile, fracture energy and the process zone size. The thickness affected only and linearly the values of the measured loads with no influence on the fracture properties: the apparent fracture toughness, fracture energy, crack opening displacements, notch sensitivity and process zone size.
Description
Funding Information: This work was funded by the Academy of Finland through the project Ice Fracture, decision number 351229 . The first author (I.E.G) was supported by the Academy of Finland also through the WindySea project (Special 170 RRF funding for research on key areas of green and digital transition [grant number 348588 ]). This financial support is gratefully acknowledged. The authors would also like to thank Teemu Päivärinta and Lasse Turja for setup design preparation, Kari Hujanen for actuator manufacturing, and Pauli Lehto for comments on the hydraulics and actuator manufacturing. Funding Information: This work was funded by the Academy of Finland through the project Ice Fracture, decision number 351229. The first author (I.E.G) was supported by the Academy of Finland also through the WindySea project (Special 170 RRF funding for research on key areas of green and digital transition [grant number 348588]). This financial support is gratefully acknowledged. The authors would also like to thank Teemu Päivärinta and Lasse Turja for setup design preparation, Kari Hujanen for actuator manufacturing, and Pauli Lehto for comments on the hydraulics and actuator manufacturing. Publisher Copyright: © 2024 The Author(s)
Keywords
Fracture, Freshwater ice, Rate effect, Thickness
Other note
Citation
Gharamti, I E, Ahmad, W, Puolakka, O & Tuhkuri, J 2024, ' Thickness-independent fracture in columnar freshwater ice : An experimental study ', Engineering Fracture Mechanics, vol. 298, 109906 . https://doi.org/10.1016/j.engfracmech.2024.109906