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

I. E. Gharamti; W. Ahmad; O. Puolakka; J. Tuhkuri

doi:10.1016/j.engfracmech.2024.109906

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

I. E. Gharamti^*, W. Ahmad, O. Puolakka, J. Tuhkuri

^*Corresponding author for this work

VTT Technical Research Centre of Finland

Research output: Contribution to journal › Article › Scientific › peer-review

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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.

Original language	English
Article number	109906
Number of pages	8
Journal	Engineering Fracture Mechanics
Volume	298
DOIs	https://doi.org/10.1016/j.engfracmech.2024.109906
Publication status	Published - 8 Mar 2024
MoE publication type	A1 Journal article-refereed

Keywords

Fracture
Freshwater ice
Rate effect
Thickness

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10.1016/j.engfracmech.2024.109906Licence: CC BY

1-s2.0-S0013794424000699-mainFinal published version, 1.18 MBLicence: CC BY

Cite this

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title = "Thickness-independent fracture in columnar freshwater ice : An experimental study",

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.",

keywords = "Fracture, Freshwater ice, Rate effect, Thickness",

author = "Gharamti, {I. E.} and W. Ahmad and O. Puolakka and J. Tuhkuri",

note = "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 P{\"a}iv{\"a}rinta 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 P{\"a}iv{\"a}rinta 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: {\textcopyright} 2024 The Author(s)",

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AU - Puolakka, O.

AU - Tuhkuri, J.

N1 - 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)

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N2 - 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.

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KW - Fracture

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KW - Rate effect

KW - Thickness

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VL - 298

JO - Engineering Fracture Mechanics

JF - Engineering Fracture Mechanics

M1 - 109906

ER -

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

Abstract

Keywords

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ICEFRACTURE: FRACTURE OF ICE

WindySea: Modelling engine to design, assess environmental impacts, and operate wind farms for ice-covered waters

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

Abstract

Keywords

Access to Document

Other files and links

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Projects

ICEFRACTURE: FRACTURE OF ICE

WindySea: Modelling engine to design, assess environmental impacts, and operate wind farms for ice-covered waters

Cite this