Banca de DEFESA: Jeanisson Cesar Mariano Silva

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : Jeanisson Cesar Mariano Silva
DATE: 08/03/2023
TIME: 08:00
LOCAL: Plataforma Microsoft Teams
TITLE:

Verification of the use of the pseudoelastic Nickel-Titanium alloy as reinforcement in a concrete beam

KEY WORDS:

Shape Memory Alloy; Smart materials, Flexural test, Special structures.

PAGES: 87
BIG AREA: Engenharias
AREA: Engenharia Mecânica
SUMMARY:

The use of reinforced concrete in the construction industry is widespread around the world and this makes some aspects need to be characterized in several technical aspects; it is a material that does not have good behavior in case of dynamic loads, due to its great rigidity and little, if any, deformation. Therefore, the proposal to use the Nickel-Titanium (NiTi) alloy as reinforcement in concrete tends to favor the recovery of deformations of a structural element and avoid abrupt collapse. This experimental research is limited to the verification of the mechanical behavior of a beam in bending and is mainly based on the international standard ASTM C78. The specimens were manufactured with conventional steel reinforcement and Nickel-Titanium reinforcement; and, tested, carefully following the requirements suggested by the technical standard in force. The results showed that, for the conventional steel, bending strength of 7.37 ± 0.67 MPa and displacement of 10.47 ± 0.47 mm were obtained, making it possible to verify that the conventional steel reinforcement supported greater stress compared to Nickel-Titanium, however, lower displacement; for the Nickel-Titanium reinforcement, the beam presented a mechanical bending strength of 5.42 ± 0.44 MPa and a displacement of 67.30 ± 1.46 mm, demonstrating that the system resisted 26.48% less in bending, however, the displacement was about 642.79% greater in relation to steel reinforcement and also showed partial recovery of the initial position of the beam even after complete failure of concrete.

BANKING MEMBERS:
Interno - 1523261 - COSME ROBERTO MOREIRA DA SILVA
Presidente - 1249764 - JORGE LUIZ DE ALMEIDA FERREIRA
Externo ao Programa - 6669206 - LUCIANO MENDES BEZERRA
Externo à Instituição - RAIMUNDO CARLOS SILVÉRIO FREIRE JÚNIOR - UFRN
Externo à Instituição - WALDEK WLADIMIR BOSE FILHO - USP