PEREIRA, Francisco Fernando Roberto.; ARAÚJO, Carlos José de.
Resumo:
Shape Memory Alloys (SMA) are materials that have an important applicative potential as
thermomechanical actuators in several fields, such as oil and gas Industry, aerospatial, medical and
dental and electrical energy. This potential is due to the ability of SMA for generation of mechanical
force through the Shape Memory Effect (SME). This work had the main objective of manufacturing
Belleville washer shape memory actuators of Ni-Ti SMA and evaluates their performance, aiming
applications in smart bolted joints. For this, it has been selected a Ni-Ti SMA of equiatomic
composition, which corresponds a weight nominal composition of 55Ni-45Ti. From this SMA, the
actuators have been produced by adapting the Plasma Skull Push Pull method (PSPP). Once
improved the manufacturing technique of SMA actuators, tests of force generation as a function of
temperature were accomplished using a universal testing machine. The obtained results shown
maximum force generation of 6kN and a residual force around 1kN, indicating a large potential for
application of these materials for development of real applications, mainly in the oil and gas Industry.