Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Characterization of an Active Composite Obtained with Shape Memory Alloys.
Submission Author:
Zoroastro Vilar , RN
Co-Authors:
William Jhonatan Lopes Bezerra, Daniel Alves Bezerra, Carlos Jose de Araujo, Paulo Ricardo de Oliveira Queiroz, Gutembergy Diniz, Zoroastro Vilar
Presenter: Zoroastro Vilar
doi://10.26678/ABCM.COBEM2017.COB17-1894
Abstract
The incorporation of wires with shape memory alloy (SMA) embedded into a metal or polymeric matrix obtains active structures. However, those polymeric matrices have better results in a wide range of applications for this kind of application. Nevertheless, composites obtained from shape memory alloys (SMA) and polymeric matrix, in spite of exhibiting an excellent activation potential, do not have good mechanical properties. Recent studies are attempting to show the possibility of obtaining an active composite with improved mechanical properties through the introduction of SMA into an epoxy matrix, as carbon fiber reinforced polymers (CFRP) as well glass fiber (GFRP). The aim of the present study is to evaluate the activation potential of composite (CFRP) containing Ni-Ti SMA wires embedded. In this context, the objective of this research is to validate the activation potential of CFRP composites containing Ni-Ti SMA wires embedded in this matrix. small plates of composites were made by incorporating NiTi wires into pre-impregnated CFRP sheets with carbon fibers positioned at an angle in NiTi wire. The activation potential of the CFRP / NiTi compounds was investigated using thermomechanical characterization for the application of the Dynamic-Mechanical Analysis (DMA) technique. An initial analysis of a pre-embedded (CFRP) aeronautic with different inclined positions of carbon fiber was performed varying the elastic modulus in order to determinate the more adequate matrix for introducing Ni-Ti SMA wires (elastic modulus of CFRP very close to Ni-Ti wires in martensitic state) to obtain active composite. Results shows that the developed composites have the ability of being activated and the active potential increases with the increase of the volumetric fraction of NiTi wires embedded in the CFRP matrix
Keywords
Active composites, CFRP, Shape Memory Alloys, natural frequency
