Applicability of micro-macro decoupling scheme to two-scale analysis of fiber-reinforced plastics

Kenjiro Terada, Norio Hirayama, Koji Yamamoto, Junji Kato, Takashi Kyoya, Seishiro Matsubara, Yusuke Arakawa, Yuta Ueno, Naohiro Miyanaga

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)


The numerical study is made to demonstrate the applicability of the method of decoupling multi-scale analysis to the micro-macro evaluation of the mechanical behavior of fiber-reinforced plastics (FRP) that exhibits inelastic deformations and internal damage of the matrix material. During the course of this demonstration, it is confirmed that the reliability of the decoupling method can be guaranteed if the macroscopic constitutive model is introduced so as to inherit the microscopic material behavior. To this end, with reference to the results of the numerical material testing on the periodic microstructures of FRP, we propose an anisotropic elastoplastic-creep-damage combined constitutive model to represent the macroscopic material behavior and illustrate the characteristics of the inelastic deformations that resemble the material behavior assumed for plastics at micro-scale. With the identified macroscopic material parameters, the macroscopic structural analysis, which is followed by the localization analysis consistently, can be an actual proof of the utility value of the decoupling method in practice.

Original languageEnglish
Pages (from-to)421-450
Number of pages30
JournalAdvanced Composite Materials
Publication statusPublished - 2014 Oct 1


  • creep
  • damage
  • decoupling multi-scale analysis
  • elastoplasticity
  • FRP
  • homogenization


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