Zhao W, Pfaller S (2021)
Publication Type: Conference contribution
Publication year: 2021
Publisher: International Center for Numerical Methods in Engineering
Conference Proceedings Title: COMPLAS 2021 - 16th International Conference on Computational Plasticity: Fundamentals and Applications
Event location: Barcelona, ESP
In this contribution we present a multiscale partitioned-domain method to simulate fracture of amorphous thermoplastic polymers. This method couples a particle-domain treated by the molecular dynamics (MD) framework and a continuum domain discretized by the Finite Element (FE) method. The FE domain is described by a viscoelastic-viscoplastic constitutive model that can reproduce the rate-dependent mechanical behavior of the MD domain within a moderate deformation range. In the highly deformed MD domain near the crack tip, hybrid boundary conditions are applied to mimic the plane strain condition, where the surfaces in the X-Y plane are subjected to periodic boundary conditions while non-periodic stochastic boundary conditions are used for the other surfaces. Using this method, we implement multiscale simulations of polymers with different pre-cracks and different strain rates under Mode-I loading conditions to demonstrate its capability for the investigation of polymer fracture.
APA:
Zhao, W., & Pfaller, S. (2021). A CONCURRENT MD-FE COUPLING METHOD TOWARDS SIMULATIONS OF FRACTURE OF THERMOPLASTIC POLYMERS. In COMPLAS 2021 - 16th International Conference on Computational Plasticity: Fundamentals and Applications. Barcelona, ESP: International Center for Numerical Methods in Engineering.
MLA:
Zhao, Wuyang, and Sebastian Pfaller. "A CONCURRENT MD-FE COUPLING METHOD TOWARDS SIMULATIONS OF FRACTURE OF THERMOPLASTIC POLYMERS." Proceedings of the 16th International Conference on Computational Plasticity: Fundamentals and Applications, COMPLAS 2021, Barcelona, ESP International Center for Numerical Methods in Engineering, 2021.
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