Establishing a multi-scale simulation computer program for materials involving complicated geometry and high-speed impact

Project Details

Description

Multi-scale simulation associated with failure evolution is challenging because theinternal mechanical behaviors become quite different as the simulation scaleincluding the spatial and temporal scale downs to an extremely small level.Additionally, this feature is also difficult to characterize or validate viaexperiments. Therefore, the solution scheme and computational program specificfor multi-scale simulation have been developed in recent decades. Since thematerial features, ingredients, configuration, and external conditions, forceconditions, boundary conditions, etc., become more and more complicated,further solution schemes and computational programs are required to cope withthose complicated issues. This proposal mainly aims to establish a useful multiscale solution scheme, which includes the macroscale and microscale ones, andits corresponding computer program for some special materials, which havecomplicated geometrical configurations, involving extreme high-speed impact.When the shock wave propagates through two different scaled regions, this multiscale solution scheme can be used to investigate the difference of the failureevolution between these two different simulation scales. In this proposal, fiberreinforced composites and metal foam are considered as the materials withcomplicated geometrical configuration. In order to deal with the above materials,this solution scheme and computer program adopt the material point method(MPM) as the priority numerical approach in macroscale simulation. It is becausethe MPM has great abilities to build a computational model with complicatedconfiguration and simulate the mechanical behaviors involving high-speed impactand failure evolution compared with the mesh method. In addition to thesimulation results, some experimental data that were conducted by US ArmyResearch Office are also used to validate the solution scheme at macroscale. Atmicroscale, molecular dynamics (MD) is selected as the numerical approach.Therefore, the failure evolution, respectively, at microscale and macroscale willbe compared and investigated. Finally, the target of this proposal is to provide auseful tool for industry or armed forces to do a qualitative analysis before theimpact experiment or to validate their experimental data after the impact experiment.
StatusFinished
Effective start/end date1/01/2131/07/23

UN Sustainable Development Goals

In 2015, UN member states agreed to 17 global Sustainable Development Goals (SDGs) to end poverty, protect the planet and ensure prosperity for all. This project contributes towards the following SDG(s):

  • SDG 9 - Industry, Innovation, and Infrastructure

Keywords

  • Multi-scale Simulation
  • Material Point Method
  • Shock Wave
  • Failure Mechanism
  • Composite Materials
  • Numerical Modeling

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