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FE 2 investigation of aggregate characteristics effect on fracture properties of concrete

Daneshyar, A ; Sharif University of Technology | 2020

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  1. Type of Document: Article
  2. DOI: 10.1007/s10704-020-00491-x
  3. Publisher: Springer Science and Business Media B.V , 2020
  4. Abstract:
  5. The relation between aggregate characteristics and fracture properties of concrete mixtures is investigated numerically. A homogenization-based multiscale approach is introduced based on objective failure zone averaging for heterogeneous meso-structure, and traction–separation law of fracture process zone (FPZ) instead of phenomenological constitutive model for macro-structure. A rate-dependent anisotropic damage-plastic formulation is employed to reproduce degradation process in the fine-scale from diffuse damage to localized bands, and extended finite element method (X-FEM) is utilized to resemble the localized region as a macro-crack within the coarse-scale. Different aggregate types are used to randomly generate meso-scale representative volume element (RVE) for concrete mixtures, and effect of size and shape of aggregates on mechanical characteristics, and sources of diversity in fracture properties of concrete are addressed. © 2020, Springer Nature B.V
  6. Keywords:
  7. Anisotropic damage ; Cohesive law ; Concrete plasticity ; Extended finite element method ; Homogenization ; Meso-scale simulation ; Multiscale ; Brittleness ; Concrete aggregates ; Concrete mixtures ; Fracture ; Mixtures ; Aggregate characteristics ; Anisotropic damages ; Degradation process ; Fracture process zone ; Mechanical characteristics ; Multi-scale approaches ; Representative volume element (RVE) ; Aggregates
  8. Source: International Journal of Fracture ; Volume 226, Issue 2 , 2020 , Pages 243-261
  9. URL: https://link.springer.com/article/10.1007/s10704-020-00491-x