A machine-learning-enhanced hierarchical multiscale method for bridging from molecular dynamics to continua

Shaoping Xiao, Renjie Hu*, Zhen Li, Siamak Attarian, Kaj Mikael Björk, Amaury Lendasse

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

Abstract

In the community of computational materials science, one of the challenges in hierarchical multiscale modeling is information-passing from one scale to another, especially from the molecular model to the continuum model. A machine-learning-enhanced approach, proposed in this paper, provides an alternative solution. In the developed hierarchical multiscale method, molecular dynamics simulations in the molecular model are conducted first to generate a dataset, which represents physical phenomena at the nanoscale. The dataset is then used to train a material failure/defect classification model and stress regression models. Finally, the well-trained models are implemented in the continuum model to study the mechanical behaviors of materials at the macroscale. Multiscale modeling and simulation of a molecule chain and an aluminum crystalline solid are presented as the applications of the proposed method. In addition to support vector machines, extreme learning machines with single-layer neural networks are employed due to their computational efficiency.

Original languageEnglish
Peer-reviewed scientific journalNeural Computing and Applications
Pages (from-to)1-15
ISSN0941-0643
DOIs
Publication statusPublished - 18.09.2019
MoE publication typeA1 Journal article - refereed

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Keywords

  • 113 Computer and information sciences
  • Extreme learning machine
  • Hierarchical multiscale method
  • Molecular model
  • Continuum model

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