Acta Mechanica Solida Sinica

, Volume 22, Issue 1, pp 73–84 | Cite as

Plastic limit analysis of ductile composite structures from micro- to macro-mechanical analysis

Article

Abstract

The load-bearing capacity of ductile composite structures comprised of periodic composites is studied by a combined micro/macromechanical approach. Firstly, on the microscopic level, a representative volume element (RVE) is selected to reflect the microstructures of the composite materials and the constituents are assumed to be elastic perfectly-plastic. Based on the homogenization theory and the static limit theorem, an optimization formulation to directly calculate the macroscopic strength domain of the RVE is obtained. The finite element modeling of the static limit analysis is formulated as a nonlinear mathematical programming and solved by the sequential quadratic programming method, where the temperature parameter method is used to construct the self-stress field. Secondly, Hill’s yield criterion is adopted to connect the micromechanical and macromechanical analyses. And the limit loads of composite structures are worked out on the macroscopic scale. Finally, some examples and comparisons are shown.

Key words

periodic composites limit analysis homogenization micro/macromechanics 

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Copyright information

© The Chinese Society of Theoretical and Applied Mechanics and Technology 2009

Authors and Affiliations

  1. 1.Department of Civil EngineeringUniversity of Science and Technology BeijingBeijingChina
  2. 2.Department of Engineering MechanicsTsinghua UniversityBeijingChina

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