PSI - Issue 61

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ScienceDirect

Procedia Structural Integrity 61 (2024) 89–97 Structural Integrity Procedia 00 (2024) 000–000 Structural Integrity Procedia 00 (2024) 000–000

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© 2024 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of IWPDF 2023 Chairman Abstract A method for modeling fracture in sti ff plates of uniform thickness is presented. The Mindlin-Reissner plate theory within the framework of the finite element method is utilized. The fracture criterion is based on the Rankine theory, in which a crack is initiated when normal traction at a node exceeds a given tensile strength. The traction is calculated as a path integral around a crack tip or a tentative split. The propagation direction is such that the normal traction at the crack tip is maximized. A time-based criterion for crack initiation and propagation is added to the model, which yields better correspondence with the experimentally observed fracture patterns. The proposed methodology was implemented in an in-house code. Initial validation shows excellent agreement between the proposed methodology’s predictions and the realistic fracture patterns of ice floes. © 2024 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http: // creativecommons.org / licenses / by-nc-nd / 4.0 / ) Peer-review under responsibility of the scientific committee of IWPDF 2023. Keywords: fracture simulation; FEM plates; ice breakup 3rd International Workshop on Plasticity, Damage and Fracture of Engineering Materials (IWPDF 2023) Finite Element Simulation of Crack Propagation in Ice Floes Igor Gribanov a, ∗ , Ahmed Elruby a , Rocky Taylor a a Memorial University of Newfoundland, 230 Elizabeth Avenue, St. John’s, NL, A1C 5S7, Canada Abstract A method for modeling fracture in sti ff plates of uniform thickness is presented. The Mindlin-Reissner plate theory within the framework of the finite element method is utilized. The fracture criterion is based on the Rankine theory, in which a crack is initiated when normal traction at a node exceeds a given tensile strength. The traction is calculated as a path integral around a crack tip or a tentative split. The propagation direction is such that the normal traction at the crack tip is maximized. A time-based criterion for crack initiation and propagation is added to the model, which yields better correspondence with the experimentally observed fracture patterns. The proposed methodology was implemented in an in-house code. Initial validation shows excellent agreement between the proposed methodology’s predictions and the realistic fracture patterns of ice floes. © 2024 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http: // creativecommons.org / licenses / by-nc-nd / 4.0 / ) Peer-review under responsibility of the scientific committee of IWPDF 2023. Keywords: fracture simulation; FEM plates; ice breakup 3rd International Workshop on Plasticity, Damage and Fracture of Engineering Materials (IWPDF 2023) Finite Element Simulation of Crack Propagation in Ice Floes Igor Gribanov a, ∗ , Ahmed Elruby a , Rocky Taylor a a Memorial University of Newfoundland, 230 Elizabeth Avenue, St. John’s, NL, A1C 5S7, Canada

1. Introduction 1. Introduction

In recent years, substantial e ff orts have been dedicated to studying ice fracture – a process that can take di ff erent forms depending on the scale, geometry, and type of ice. A commonly observed ice fracture event is the breakup of river ice in the springtime. Rivers and ponds usually get a uniform ice cover, whose horizontal dimension varies from several meters to several kilometers and is larger than its typical thickness (Figure 1). Plate elements in the Finite Element Method (FEM) are commonly used to analyze structures that have a dominant in-plane behavior. The decision to use plate elements depends on several factors including the geometry, material properties, loading conditions, and desired level of accuracy. Situations that benefit from the use of plate elements include: In recent years, substantial e ff orts have been dedicated to studying ice fracture – a process that can take di ff erent forms depending on the scale, geometry, and type of ice. A commonly observed ice fracture event is the breakup of river ice in the springtime. Rivers and ponds usually get a uniform ice cover, whose horizontal dimension varies from several meters to several kilometers and is larger than its typical thickness (Figure 1). Plate elements in the Finite Element Method (FEM) are commonly used to analyze structures that have a dominant in-plane behavior. The decision to use plate elements depends on several factors including the geometry, material properties, loading conditions, and desired level of accuracy. Situations that benefit from the use of plate elements include:

• the structure’s thickness is small compared to its other dimensions • the primary mode of deformation is bending rather than stretching or shearing • the structure’s thickness is small compared to its other dimensions • the primary mode of deformation is bending rather than stretching or shearing

∗ Corresponding author. E-mail address: ig1453@mun.ca ∗ Corresponding author. E-mail address: ig1453@mun.ca

2452-3216 © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of IWPDF 2023 Chairman 10.1016/j.prostr.2024.06.013 2210-7843 © 2024 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http: // creativecommons.org / licenses / by-nc-nd / 4.0 / ) Peer-review under responsibility of the scientific committee of IWPDF 2023. 2210-7843 © 2024 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http: // creativecommons.org / licenses / by-nc-nd / 4.0 / ) Peer-review under responsibility of the scientific committee of IWPDF 2023.