Discrete-element-method model for frictional fibers

Area of Science:

• Computational mechanics
• Materials science
• Physics of granular materials

Background:

• Simulating the mechanical behavior of elastic fibers, especially under frictional contact, is complex.
• Existing models may not fully capture the interplay of elongation, bending, and torsion in fiber interactions.

Purpose of the Study:

• To develop and present a novel discrete-element-method (DEM) algorithm for simulating elastic fibers in frictional contact.
• To provide a robust computational tool for analyzing fiber behavior in scenarios involving multiple contact points.

Main Methods:

• Fibers modeled as chains of cylindrical segments connected by springs, incorporating elongation, bending, and torsion.
• Frictional contacts modeled using the Cundall and Strack method, commonly applied in granular material simulations.
• Detailed discussion of simulation scales, contact determination, and tracking within the algorithm.

Main Results:

• The algorithm successfully simulates elastic fibers with complex mechanical properties.
• Demonstrated accuracy through comparisons with experimental data and theoretical predictions for various contact scenarios.
• Validated the discrete-element-method approach for modeling fiber-frictional contact interactions.

Conclusions:

• The presented DEM algorithm offers a reliable method for simulating elastic fibers in frictional contact.
• The approach is suitable for scenarios ranging from few to many contact points.
• This work advances computational modeling capabilities for fiber assemblies and granular materials.