Shape Memory Hybrid Composites

Abstract

Smart structures can help to resolve many issues related to conventional materials that are being used in different industries. Shape memory alloys (SMAs) are smart materials with better actuation response, vibration damping characteristics, and large strain recovery, making them good candidates due to their high strength and corrosion resistance for various engineering applications. The performance of fiber-reinforced polymer (FRP) composite materials that are replacing many conventional materials due to their good strength, stiffness, and lightweight potential especially in fuel-consuming industries such as aerospace and automotive, can further be improved by impregnation with SMAs. This review discusses the SMA-reinforced FRP composites, leading to shape memory hybrid composite materials, the issues and limitations in composite manufacturing, and their uses in different research arenas including impact and damping applications, seismic protection applications, crack closure applications, shape morphing applications, and self-deployable structures.

Effect of Heat‐Treatment and NiB–TiO2 Composite Coating on the Tribological Performance of AISI P20 Steel

“…According to the literature, this result is evident since the hardness of the applied coating is significantly greater than that of uncoated P20 steel. [ 41,54 ] The surface morphology of the deposit also influences the friction coefficient values with a finer grain size resulting in a lower friction coefficient. [ 54 ] The friction coefficients of NiB–TiO 2 coating slightly reduced when applied to AISI P20 HT due to its finer Ni grain size and smoother surface (Figure 2).…”

“…[ 41,54 ] The surface morphology of the deposit also influences the friction coefficient values with a finer grain size resulting in a lower friction coefficient. [ 54 ] The friction coefficients of NiB–TiO 2 coating slightly reduced when applied to AISI P20 HT due to its finer Ni grain size and smoother surface (Figure 2). For example, at a load of 11 N, the average friction coefficient of the coating is about 0.54 and 0.47 when applied to as‐received P20 and AISI P20 HT, respectively.…”

Interface stress transfer model and modulus parameter equivalence method for composite materials embedded with tensile pre-strain shape memory alloy fibers

“…SMA is a brand-new class of smart material that possesses special qualities like superelasticity, temperature phase transition, and pre-strain. SMAC, which are composed of SMA and matrix materials, can fully exploit the phase transition and reinforcement attributes of SMA to increase the strength and kinetic properties of the composites [8][9][10][11][12]. Currently, there are two primary problems with composite plates using shape memory alloys (SMAs): firstly, the modulus of the SMA and the substrate varies significantly.…”

Mechanics of thermo-active composites with two-way shape memory springs

“…Fiber arrangement and material properties can be modified to satisfy the requirements of application. [15,26,27] The versatility of the thermal spring extends to numerous applications. For instance, it can be effectively employed in fabric design, particularly in cases where conformity to specific surface shapes is essential [28] , such as facial masks (Figure 4.24).…”