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An immersed peridynamics model of fluid-structure interaction accounting for material damage and failure
Keon Ho Kim1, Amneet P S Bhalla2, Boyce E Griffith3,4,5,6
1Department of Mathematics, University of North Carolina, Chapel Hill, NC, USA.
Journal of Computational Physics
|July 18, 2025
Summary
This study introduces an immersed peridynamics method for simulating hyperelastic material deformation and failure in fluid-structure interactions. The novel approach accurately models material damage and rupture under large deformations.
Area of Science:
- Computational mechanics
- Fluid-structure interaction
- Material science
Background:
- Simulating hyperelastic material behavior in fluid environments is complex.
- Existing methods struggle with large deformations and material failure.
- Bridging continuum mechanics and peridynamics offers new possibilities.
Purpose of the Study:
- To develop and validate an immersed peridynamics method for fluid-structure interaction.
- To simulate deformation, damage, and failure in hyperelastic materials.
- To leverage peridynamics for robust modeling of soft materials.
Main Methods:
- Developed an immersed peridynamics approach for incompressible structures in viscous fluids.
- Coupled Eulerian fluid dynamics with Lagrangian peridynamic structural mechanics.
- Utilized non-ordinary state-based peridynamics for constitutive modeling.
Main Results:
- Achieved comparable accuracy to immersed finite element methods.
- Demonstrated grid-converged simulations of material damage and crack propagation.
- Successfully modeled rupture under large deformations.
Conclusions:
- The immersed peridynamics method is accurate and efficient for simulating complex material behaviors.
- This approach enables detailed study of fluid-driven damage and failure in soft materials.
- Offers a powerful tool for computational mechanics and material science research.
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