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Multi-scale damage model of fiber-reinforced concrete with parameter identification : doctoral thesis
Rukavina, Tea
In this thesis, several approaches for modeling fiber-reinforced composites are proposed.The material under consideration is fiber-reinforced concrete, which is composedof a few constituents: ...concrete, short steel fibers, and the interface betweenthem. The behavior of concrete is described by a damage model with localized failure,fibers are taken to be linear elastic, and the behavior of the interface is modeled witha bond-slip pull-out law. A multi-scale approach for coupling all the constituents isproposed, where the macro-scale computation is carried out using the operator-splitsolution procedure. This partitioned approach divides the computation in two phases,global and local, where different failure mechanisms are treated separately, which is inaccordance with the experimentally observed composite behavior. An inverse modelfor fiber-reinforced concrete is presented, where the stochastic caracterization of thefibers is known from their distribution inside the domain. Parameter identificationis performed by minimizing the error between the computed and measured values.The proposed models are validated through numerical examples
Type of material - dissertation
; adult, serious
Publication and manufacture - Rijeka : [T. Rukavina], 2018
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