Estudo de propriedades dinâmico-mecânicas de um compósito aeronáutico de CFRP com fios de ligas com memória de forma embebidos

Araújo

Lima

et al. 2017

Smart materials are a class of materials characterized by having a different behavior due to external stimulation, which can be mechanic, thermal, electric, or magnetic. This chapter approaches the different types of smart materials and their classification according to the material’s nature (fluid, ceramic, polymeric and metallic). Emphasis is given to the theoretical study of the metallic materials with shape memory, presenting the fundamentals, crystallographic study and the mathematical methods of phase transformation. Due to these metallic material’s unique features, shape memory effect and super elasticity, the usage in the production of composite structures has gained space. Such materials present several advantages if compared to traditional composites being subject of research for several industrial applications

Section: Polymeric Composites Reinforced With Shape Memory Alloysmentioning

confidence: 99%

Smart Materials - Theory and Applications

Araújo

Lima

et al. 2017

“…Villar et al [21] noticed the difficulty of adhesion between the SMA metallic alloys and polymeric matrix. The studied sample consisted of a sandwich composite, resin and fiber layers, reinforced with SMA wires.…”

Section: Introductionmentioning

confidence: 99%

Resin Injection Process in the Manufacture of a Polymer Composite Reinforced with NiTi Ribbons: A CFD Analysis

Porto

Lima

et al. 2020

This work aims to numerically simulating the resin injection manufacturing process of a polymer composite,reinforced with ribbons of NiTishape memory alloy, using the software Ansys CFX®. The multiphase flow mathematical modeling was used to describe the transient and isothermal resin-air flow during the process. Results of the pressure fields, velocity andvolume fractionsof the involved phases are presented. The fluid flow inside the mold was compared withthe flow between parallel flat plates and showed to be consistent. Process parameters, such as resin volumetric flow rate, resin inlet and air outlet positions have a large influence in the mold filling time, volume and position of voids fractions inside de mold and final product quality.

“…Vilar et al [17], in your research, studied the dynamic-mechanical properties of a composite reinforced with carbon-fiber with NiTi wires. This work attributed the reduction of elasticity modulus to the softening of matrix, and the fraction of the NiTi in the composition of the sample.…”

Section: Introductionmentioning

confidence: 99%

Thermal Behaviour of Polymer Composite Reinforced with NiTi Shape Memory Alloys

Leal²,

Araújo

et al. 2017

Shape memory alloys (SMA) are materials with metallic characteristic able to recover a geometric shape previously established under heat effect. This differentiated property, combined with the mechanical characteristic allows its use in many industrial situations. Active composites are produced with the polymeric matrix and wire of shape memory alloy, combining the elastic properties of the composite and characteristics of the phase transformation, martensite and austenite of SMA with memory alloy effect. The phase transformations that occur in the alloy are thermal processes, characterized by an increase in temperature during processing. The heat is transmitted for matrix, resulting in loss of mechanical properties of the composite. In this context, this paper aims to numerically analyze heat transfer in an epoxy resin polymer matrix incorporating Ni-Ti alloy wire with shape memory effect using ANSYS CFX software.