Caracterização termomecânica de compósitos híbridos com memória de forma

AUTOR(ES)
DATA DE PUBLICAÇÃO

2008

RESUMO

The Shape Memory Alloys - SMA - are materials with the ability to recover a certain geometric form previously established upon heating. This singular behavior enables their application in many situations, from orthodontic arches and medical instruments to adaptative structures for shape and vibration control. Due to the complexity of their thermomechanical behavior the thermomechanical characterization of the SMA is a fundamental step in the development of applications based on SMA. In the development of adaptative structures for shape and vibration control the shape memory alloy hybrid composites - SMAHC - is the most promising way to explore these alloys. Therefore, in adition to the complexity of the thermomechanical behavior of the SMA the SMAHC materials involves the complexity of the composite too, becoming the thermomechanical characterization even more necessary. The aim of the present work is to characterize thermomechanically SMAHC materials. Such characterization consists, basically, of obtaining stress-strain curves for different combinations matrix/SMA wires at different temperatures (in martensitic and austenitic phases). A comparative analysis of the obtained results in the different phases show how the different mechanical properties (elastic modulus, ultimate strain and ultimate tensile stress) behave as function of temperature and SMA volume fraction.

ASSUNTO(S)

engenharia mecanica ligas com memória de forma materiais compósitos estruturas adaptativas confecção de moldes materiais funcionais confecção de cps smahc

ACESSO AO ARTIGO

Documentos Relacionados