BATISTA NETO, F. P.; http://lattes.cnpq.br/4568734737385372; BATISTA NETO, Francisco Procópio.
Resumo:
For centuries, metals and their alloys have played an extremely important role in the
category of structural materials, but currently the development and application of hybrid
materials is growing significantly. Most polymer composite materials are used at
temperatures close to ambient temperature, since at higher temperatures a significant
loss in mechanical properties of this kind of material is observed. Thus, the aim of this
work is the development of a multifunctional composite material with SMA Ni-Ti-Cu
meshes, obtained by precision casting, added in a conventional composite material
(GFRP), in which the meshes act as an “active" or "smart" reinforcement. In this work
the multifunctional composites having different configurations are analyzed from their
manufacture up to their thermomechanical characterization. The results obtained
showed that the SMA meshes showed phase transformation and increased stiffness
close to room temperature, in contrast to what happens to the GFRP used whose glass
transition temperature (Tg) is just above room temperature. Isothermal bending tests
showed that the insertion of the SMA mesh in the composite material led to a significant
increase in the mechanical properties evaluated in the two configurations developed
(with the mesh in the neutral line and outside the neutral line). Finally, we conclude
that the insertion of the SMA mesh in the neutral line of the composite material proved
to be the best configuration for multifunctional hybridization of the composite material.