A non-linear viscoelastic material model with progressive damage based on microstructural evolution and phase transition in polycrystalline ice for design against ice impact

• Published in: International journal of impact engineering Vol. 176; p. 104563
• Main Authors: Mokhtari, Mojtaba, Kim, Ekaterina, Amdahl, Jørgen
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.04.2023
• Subjects: Damage model; Ice impact; Material model; Multiphysics; Rate-dependent material; Viscoelasticity; Damage model; Viscoelasticity; Multiphysics; Rate-dependent material; Ice impact; Material model
• ISSN: 0734-743X; 1879-3509
• DOI: 10.1016/j.ijimpeng.2023.104563

•A viscoelastic material model with progressive damage for ice under impact loading.•Iterative algorithm for pressure- and rate-dependent progressive damage.•The model is implemented with Lagrangian FEM, coupled FEM-SPH, and ALE-FEM.•Validation against physical creep and ice crushing tests with various speeds.•Modelling cyclic transition from solid-like intact to fluid-like viscous crushed ice. This study presents a nonlinear viscoelastic material model incorporating a progressive damage framework with an iterative algorithm for glacial/freshwater polycrystalline ice subject to compressive impact load induced by ice-structure interaction. The damage model accounts for microcracking, dynamic recrystallisation, pressure melting, and high-shear elastic failure with a pressure- and rate-dependent convex failure locus. The constitutive laws are written in Fortran and implemented as a vectorised user material (VUMAT) in Abaqus with three different numerical methods, Lagrangian FEM, coupled FEM-SPH, and ALE-FEM. The constitutive model together with the implemented numerical methods are validated against two different types of laboratory-scale physical tests, indentation of cone-shaped ice and triaxial creep. The proposed model implemented with the coupled FEM-SPH method enables simulation of the cyclic transition from solid-like intact ice to the fluid-like pulverised/granular substance, progressively extruded with viscous rheology.