Researchers Develop Strategies to Eliminate Nonphysical Attraction Forces in Viscous Contact Models

Strategic Insights -

Fresh data on Mathematics-Nonlinear Science and Numerical Simulation have been presented by a team of researchers from the Xi'an University of Architecture and Technology. The study aimed to develop three strategies to eliminate the nonphysical attraction force that distorts the impact behavior in granular systems, using the viscous contact force models. The researchers found that the optimization principle for removing the nonphysical attraction force of the viscous damping factor is confirmed according to the characteristics of the viscous damping force. Financial support for this research came from the National Natural Science Foundation of China (NSFC).

Key Takeaways:

  • The researchers developed three strategies to eliminate the nonphysical attraction force in viscous contact models: dividing the impact process into three phases, separating the impact process into two phases, and treating the impact behavior as a complete process.
  • The first approach, developed according to the relationship between hysteresis damping and viscous damping, effectively eliminates nonphysical forces and captures post-impact behavior.
  • The second method, proposed using the feature of viscous damping, is also effective in eliminating nonphysical forces and capturing post-impact behavior.
  • The last approach, which treats the impact behavior as a complete process to formulate a unique viscous contact force model without nonphysical attraction force, is also found to be effective.
  • The research has been peer-reviewed and is published in the journal Communications In Nonlinear Science and Numerical Simulation.
  • The study highlights the importance of optimizing the viscous damping factor to improve the accuracy of viscous contact force models.

Statistics:

  • The study aims to develop strategies to eliminate nonphysical attraction forces in viscous contact models.
  • The research found that all three optimized strategies effectively eliminate nonphysical forces and capture post-impact behavior.
  • The study was funded by the National Natural Science Foundation of China (NSFC).
  • The research has been peer-reviewed and is published in the journal Communications In Nonlinear Science and Numerical Simulation.

Sources:

  • NewsRx. Researchers from Xi'an University of Architecture and Technology Describe Findings in Nonlinear Science and Numerical Simulation (Optimal Damping Factors Explored for Eliminating Nonphysical Attraction Forces From Viscous Contact Models Used In ...). Mathematics Week. November 4, 2025; p 408.
  • Elsevier. Communications In Nonlinear Science and Numerical Simulation. (www.journals.elsevier.com/communications-in-nonlinear-science-and-numerical-simulation/)
  • Gengxiang Wang, et al. Optimal Damping Factors Explored for Eliminating Nonphysical Attraction Forces From Viscous Contact Models Used In Cohesionless Granular System. Communications In Nonlinear Science and Numerical Simulation, 2025;150.