Thermal Activation of CFRP with Embedded NiTi Shape Memory Wires

Abstract:

The possibility of uniting two or more different materials to obtain structures capable to feel and adapt to environmental alterations and operational conditions, has been leading to the development of active composites with functional properties that makes possible the control of shape, vibration, rigidity and/or structural integrity monitoring. These characteristics are very well accepted in modern technological applications. In this context, active composites were manufactured using pre-impregnated (Pre-Pregs) of carbon fiber reinforced polymer (CFRP) and NiTi shape memory alloy (SMA) thin wires in different conditions. The functional capacity of the obtained CFRP-NiTi smart composites was verified through detection of buckling and thermal contraction/expansion effects by electrical heating of the NiTi wires inside the CFRP matrix. Although the NiTi wires represent a minimum volumetric fraction in the CFRP-NiTi produced systems, its influence was evidenced.

• Periodical: Materials Science Forum (Volume 643)
• Pages: 19-28
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.643.19
• Online since: March 2010
• Authors: Zoroastro Tôrres Vilar, Carlos José de Araújo, Rômulo Pierre Batista Dos Reis
• Keywords: Active Composite, Electrical Resistance, NiTi Alloy, Smart Materials, Smart Structure, Thermal Buckling

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