Multiscale modeling for planar lattice microstructures with structural elements

Isao Saiki, Ken Ooue, Kenjiro Terada, Akinori Nakajima

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Formulations of linear and nonlinear multiscale analyses for media with lattice periodic microstructures based on the homogenization theory are proposed. For continuum media, the conventional homogenization theory leads to boundary value problems of continuum for both micro- and macroscales. However, it is rational to discretize lattice microstructures, such as cellular solids, by frame elements since they consist of slender members. The main difficulty in utilizing structural elements, such as frame elements, for microscale problems is due to the inconsistency between the kinematics assumed for the frame elements and the periodic displacement field for the microscale problem. In order to overcome this difficulty, we propose a formulation that does not employ the periodic microscale displacement, but the total displacement, including the displacement due to uniform deformation as well as periodic deformation, as the independent variable of the microscale problem. Some numerical examples of cellular solids are provided to show both the feasibility and the computational efficiency of the proposed method.

Original languageEnglish
Pages (from-to)429-444
Number of pages16
JournalInternational Journal for Multiscale Computational Engineering
Volume4
Issue number4
DOIs
Publication statusPublished - 2006 Dec 1

Keywords

  • Cellular solids
  • Frame elements
  • Homogenization method
  • Lattice structures
  • Multiscale modeling
  • Periodic microstructures

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Computational Mechanics
  • Computer Networks and Communications

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