On behaviors of the shape memory composite containing shape memory polymer matrix and shape memory alloy fibers under uniaxial loading with different temperature conditions

Abstract

The shape memory polymers (SMPs) and shape memory alloys (SMAs), as typical smart materials, have got enormous attention in the fields of aerospace, microsystems, and biomedicine due to their superior shape memory properties. Combining the high strength of SMAs and the large deformation of SMPs, the shape memory polymer composites with the shape memory alloys fibers (SMPC-SMAs) formed by SMP matrix and SMA fibers have the dual advantages of SMAs and SMPs. For the different loading conditions, the mechanical behaviors of the SMPC-SMAs are investigated in this work, by combining with the mechanics of composite materials and the constitutive models of SMPs and SMAs. Compared with the mechanical behavior of pure uniaxial loading, the influence of temperature changes on the phase transition of the material is considered under different constraints. Compared with mechanical behaviors of pure SMAs and pure SMPs, the thermomechanical behaviors of the SMPC-SMAs are discussed and simulated considering the coupling of the phase transition of SMPs and SMAs. And the effects of different fiber content and different pre-strain on the behaviors of such SMPC-SMAs are finally discussed, respectively. The results showed that different mechanical properties for SMPC-SMAs are displayed; such materials not only can maintain the normal shape memory effect but also have the greater strength, which will be a better engineering application prospect.

Biobased and Biodegradable Shape Memory Polymers of Eucommia Ulmoides Gum and Polycaprolactone via Dynamic Vulcanization

“…SMPs find extensive applications in diverse fields including biomedicine, aerospace, textiles, protective equipment, and so on . Furthermore, research has extended into the field of four-dimensional (4D) printing materials, involving the use of biocompatible polycaprolactone softeners to enhance the shape memory effects and FFF printability of poly­(vinyl chloride), as well as studies on the applications of polycaprolactone-thermoplastic polyurethane composites. − The most prevalent SMPs among these are heat-triggered SMPs (HSMPs). − The temporary shapes of HSMPs tend to be generated at temperatures higher than the transition temperature ( T trans , glass transition temperature ( T g ) or melting temperature ( T m )), which provides structural flexibility to the chain segments. Shape memory effects (SME) are commonly observed in various block copolymers, where the hard segments possess physical or chemical cross-linked points while the soft segments assume permanent and temporary shapes, respectively.…”

Photo‐activated shape memory polymer with chiral twisting based on anisotropic bilayer thin sheets

“…Generally, stimuli-responsive morphing materials are divided into hydrogels, dielectric elastomer, and shape memory polymers (SMPs). [1][2][3][4][5] Of these stimuli-responsive morphing materials, SMPs can recover to their permanent shape in a predefined way upon exposure to external stimulations. [6][7][8][9] They have drawn much research interests due to their potential usage in the field ranging from biomimetics to sensors and actuators, flexible electronic device, and aerospace applications.…”

“…Stimuli‐responsive morphing materials belong to one kind of molecules with “intelligent” behavior, which can generate corresponding response signals upon the stimuli of heat, light, electric field, etc. Generally, stimuli‐responsive morphing materials are divided into hydrogels, dielectric elastomer, and shape memory polymers (SMPs) 1–5 . Of these stimuli‐responsive morphing materials, SMPs can recover to their permanent shape in a predefined way upon exposure to external stimulations 6–9 .…”

Analysis and optimization of M‐shaped boom based on response surface method

“…The current research on shape memory materials includes improving their mechanical properties at high temperature [1] and improving their heat resistance [2] by modification. And adding glass microspheres [3] and metal wires [4] improves its poor mechanical properties. However, its application still has certain limitations.…”