Nonlinear homogenization method for practical applications

K. Terada, N. Kikuchi

Research output: Contribution to journalConference articlepeer-review

109 Citations (Scopus)

Abstract

The homogenization method applied to nonlinear problems is discussed from practical point view. The conventional procedure of the asymptotic homogenization method for linear elasticity problems is directly extended to nonlinear problems by using rate formulation of the updated Lagrangian scheme. Analysis is made for a composite material whose constituents reveal elastoplasticity character as well as finite deformation in which a local periodicity can be assumed. The updating scheme also enables us to utilize the microscopic stress field, which is obtained in a localization process, to judge, for example, plastic failure. Several computational features in the incremental solution method are investigated to examine the feasibility of the nonlinear homogenization method in practical applications. Numerical examples verify the formulation and provide some insight into practical applications. Some brief remarks are made on large deformation of a periodic unit cell and on computing costs in global-local simultaneous computations. The expensive cost in the computation requires us to propose a new approach to large scale problems. Here the nonlinear homogenization solutions are used as experimental data and construct the macroscopic constitutive relations.

Original languageEnglish
Pages (from-to)1-16
Number of pages16
JournalAmerican Society of Mechanical Engineers, Applied Mechanics Division, AMD
Volume212
Publication statusPublished - 1995 Dec 1
Externally publishedYes
EventProceedings of the 1995 ASME International Mechanical Engineering Congress and Exposition - San Francisco, CA, USA
Duration: 1995 Nov 121995 Nov 17

ASJC Scopus subject areas

  • Mechanical Engineering

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