کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
497885 | 862948 | 2015 | 20 صفحه PDF | دانلود رایگان |
A particle-based multiscale simulation procedure is being developed that includes a concurrent link between the Material Point Method (MPM) and Dissipative Particle Dynamics (DPD) and a hierarchical bridge from Molecular Dynamics (MD) to DPD. In this paper, an interfacial scheme is presented that can be used to effectively cast spatial discretization at different scales into a unified MPM framework. The advantage to the approach is that the interactions among discrete nanostructures under extreme loading conditions can be simulated without the need for master/slave nodes as required in the Finite Element Method and other similar mesh-based methods. The proposed multiscale simulation scheme is applied to representative cases: tensile extension of a single nanobar, isothermal compression of a cube-shaped nanoparticle in a high-pressure fluid, and the behavior of nanosphere pairs and nanosphere–nanorod assemblies in a confining fluid for different initial arrangements of the components. The concurrent DPD/MPM results are in good qualitative agreement with the predictions obtained using a DPD-only description and all-atom MD, but require much less computational time as compared to all-atom simulations.
Journal: Computer Methods in Applied Mechanics and Engineering - Volume 297, 1 December 2015, Pages 219–238