Self-consistent clustering analysis: An efficient multi-scale scheme for inelastic heterogeneous materials

Zeliang Liu, M. A. Bessa, Wing Kam Liu*

*Corresponding author for this work

Research output: Contribution to journalArticle

84 Scopus citations

Abstract

The discovery of efficient and accurate descriptions for the macroscopic behavior of materials with complex microstructure is an outstanding challenge in mechanics of materials. A mechanistic, data-driven, two-scale approach is developed for predicting the behavior of general heterogeneous materials under irreversible processes such as inelastic deformation. The proposed approach includes two major innovations: (1) the use of a data compression algorithm, k-means clustering, during the offline stage of the method to homogenize the local features of the material microstructure into a group of clusters; and (2) a new method called self-consistent clustering analysis used in the online stage that is valid for any local plasticity laws of each material phase without the need for additional calibration. A particularly important feature of the proposed approach is that the offline stage only uses the linear elastic properties of each material phase, making it efficient. This work is believed to open new avenues in parameter-free multi-scale modeling of complex materials, and perhaps in other fields that require homogenization of irreversible processes.

Original languageEnglish (US)
Pages (from-to)319-341
Number of pages23
JournalComputer Methods in Applied Mechanics and Engineering
Volume306
DOIs
StatePublished - Jul 1 2016

Keywords

  • Data compression
  • K-means clustering
  • Multi-scale
  • Plasticity
  • Reduced order model
  • Self-consistent method

ASJC Scopus subject areas

  • Computational Mechanics
  • Mechanics of Materials
  • Mechanical Engineering
  • Physics and Astronomy(all)
  • Computer Science Applications

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