Computational modeling of fracture in concrete using a meshfree meso-macro-multiscale method推荐.pdf

Computational Materials Science 69 (2013) 204–215 Contents lists available at SciVerse ScienceDirect Computational Materials Science journal homepage: www.elsevier .com/locate/commatsci Computational modeling of fracture in concrete using a meshfree meso-macro-multiscale method A. Ghosh ⇑, P. Chaudhuri IIT Madras, Department of Engineering, India a r t i c l e i n f o a b s t r a c t Article history: The focus of this manuscript is on multiscale modeling of material failure of concrete. The concrete mate- Received 18 May 2012 rial far away from the fracture process zone is modeled by a macroscopic homogenized material model Received in revised form 4 November 2012 while a non-linear mesoscopic constitutive model is used in the fracture process zone. On the mesoscopic Accepted 14 November 2012 scale, the constituents of the composites material (concrete), i.e. the cement matrix and the aggregates, are modeled. Fracture occurs only in the cement matrix and is modeled by a cohesive zone model (CZM) in the context of an enriched partition of unity meshfree method. We also test the influence of the inter- Keywords: face model between the cement and the aggregates. Numerical results demonstrate the importance of the Applied mechanics Fracture mechanics interface model. The method is validated by comparison to experimental data for different failure modes. Damage