The Driving Effect Of Fe-Mn-Si Shape Memory Alloy On Fiber Reinforced Composite Beam

As a new kind of functional material, Fe-Mn-Si Shape Memory Alloy, with its good mechanical performance and economical efficiency, has great potentials in many applications. In recent years, domestic and overseas scholars apply Shape Memory Alloy to the field of composites, taking advantage of the special mechanical property of Shape Memory Alloy to develop a variety of SMA functional composite materials. At present, most of Fe-base Shape Memory Alloy functional composite materials use concrete, gypsum, cement as matrix material. However, this paper design a composite beam, which is driven by Fe-Mn-Si alloy wire and uses composite beam of glass fiber reinforced epoxy resin as matrix, by means of theoretical calculation, optimization analysis, measurement of Fe-Mn-Si alloy recovery stress and numerical simulation based on ANSYS software, to study the driving effect of Fe-Mn-Si alloy on fiber reinforced composite beam.Fe-Mn-Si alloy wire placed in fiber reinforced composite has a similar effect of bending moment on beam, combining with the knowledge of engineering mechanics to deduce the bending stiffness formula of fiber reinforced composite beam and deflection formula of beam midpoint under the driving of Fe-Mn-Si alloy. Taking the bottom edge distance of Fe-Mn-Si alloy beam and cross-section height of beam with the same area as design variables, using the flexural rigidity of the beam as objective function, The optimal point and the optimal solution can be obtained by adopting genetic optimization algorithm. After calculating the beam midpoint deflection under Fe-Mn-Si alloy driving and concentrated forces, optimize results can be verified.Fe-Mn-Si Shape Memory Alloy’s recovery force applies on bearing cantilever beam and makes it bending. Recovery force is calculated by using NI9235data acquisition module and matched NI LabVIEW SignalExpress2009software to collect bending strain value of bearing cantilever beam surface. Based on this principle, the recovery force measuring device of Fe-Mn-Si Shape Memory Alloy is designed and produced and Fe-Mn-Si Shape Memory Alloy’s restoring force is measured.Based on finite element ANSYS platform, the driving effect of Fe-Mn-Si Shape Memory Alloy on Fiber reinforced composite beam is calculated emulationally by making use of The integrated initial strain method. As the result display, fiber reinforced composite beam deformation obviously and appeared pull-down stress state inside under the driving of Fe-Mn-Si alloy. Simulation is found that the shape of alloy, arrangement between the alloys, the positions of the alloy in the beam and the shape of composite beam’s cross section have an influence on driving effect.