Meso-scale computational modeling of the fracture of concrete with complex shaped aggregates under the self-restraint stress

Qiu, Wei; Ueda, Tamon; Fu, Shaojun; Ye, Han; Wang, Jun; Ye, Jianqiao

doi:10.1016/j.compstruct.2022.116267

Cited by 10 publications

(1 citation statement)

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“…In the first step, a geometric model representing the heterogeneous structure of the polymer concrete was generated. The model was based on spherical models of aggregates and hollow spherical models of the ITZ with a wall thickness equal to one-tenth of the diameter of the corresponding aggregates [35]. Aggregates smaller than 5 mm in diameter were incorporated into the polymer matrix [36].…”

Section: Finite Element Modelmentioning

confidence: 99%

Mesoscale Modeling of Polymer Concrete Dynamic Properties

Dunaj

2023

Polymers

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There is a constant need to predict the dynamic properties of composite materials already at the design stage. A particularly attractive tool for achieving this goal is mesoscale finite element modeling. This paper presents the mesoscale modeling of the dynamic properties of polymer concrete. The method is based on finite element modeling and substructural identification. Substructural identification is a model updating technique based on frequency response functions. It enables the identification of model dynamic properties considering damping. The presented method is used to model the dynamic properties of a polymer concrete beam. In the first step, the mesoscale finite element model is built and then it is decoupled into substructures: a polymer matrix, aggregates, and an interfacial transition zone (ITZ). Next, the dynamic properties of the polymer matrix substructure are updated, and the model is reassembled. Then, second-stage updating takes place, which consists of determining the parameters of the aggregates and the ITZ. The use of substructural identification made it possible to determine the parameters of substructures that do not exist in an independent, isolated form like the ITZ. Moreover, it allows for determining the amount of damping that ITZ brings to the structure.

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Section: Finite Element Modelmentioning

confidence: 99%