Computers and Concrete

  • 제15권5호
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  • Pages.735-758
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  • 2015
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  • 1598-8198(pISSN)
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  • 1598-818X(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Modeling of unilateral effect in brittle materials by a mesoscopic scale approach

  • Pituba, Jose J.C. (Department of Civil Engineering, Federal University of Goias) ;
  • Neto, Eduardo A. Souza (Civil and Computational Engineering Centre, School of Engineering, Swansea University)
  • 투고 : 2013.04.25
  • 심사 : 2015.01.24
  • 발행 : 2015.05.25
⟨ 이전 논문 다음 논문 ⟩

초록

This work deals with unilateral effect of quasi-brittle materials, such as concrete. For this propose, a two-dimensional meso-scale model is presented. The material is considered as a three-phase material consisting of interface zone, matrix and inclusions - each constituent modeled by an appropriate constitutive model. The Representative Volume Element (RVE) consists of inclusions idealized as circular shapes randomly placed into the specimen. The interface zone is modeled by means of cohesive contact finite elements developed here in order to capture the effects of phase debonding and interface crack closure/opening. As an initial approximation, the inclusion is modeled as linear elastic as well as the matrix. Our main goal here is to show a computational homogenization-based approach as an alternative to complex macroscopic constitutive models for the mechanical behavior of the quasi-brittle materials using a finite element procedure within a purely kinematical multi-scale framework. A set of numerical examples, involving the microcracking processes, is provided. It illustrates the performance of the proposed model. In summary, the proposed homogenization-based model is found to be a suitable tool for the identification of macroscopic mechanical behavior of quasi-brittle materials dealing with unilateral effect.

키워드

과제정보

연구 과제 주관 기관 : CAPES Foundation

참고문헌

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