Digital Repository, CONVEGNO IGF XXII ROMA 2013

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Modeling of smart concrete beams with Shape Memory Alloy actuators
S. Malagisi, E. Sacco, S. Marfia, J. Toti

Last modified: 2013-06-27


In the present work, a computational strategy for the modeling of reinforced concrete beams with
shape memory alloy (SMA) actuators for flexural cracks repair is developed. In particular, for the concrete, a
nonlocal damage and plasticity model is adopted; the model is able to consider peculiar macroscopic behaviors
which characterize the quasi-brittle materials, such as the tensile and compressive damaging, accumulation of
irreversible strains and the unilateral phenomena. The development of the flexural cracks in concrete are
modeled using the cohesive zone interface formulation, which accounts for the mode I, mode II and mixed
mode of damage, the unilateral contact and the friction effects. The interface model considers even the coupling
between the body damage and the interface damage ensuring that body damage and interface damage cannot
evolve independently one from the other. A uniaxial SMA model able to reproduce both the pseudo-elastic
behavior and the shape memory effect is adopted for the reinforcing SMA wires.
Finally, finite element simulations are developed in order

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