High glass-transition polyurethane-carbon black electro-active shape memory nanocomposite for aerospace systems

Arun, D I; Kumar, Krishna; Kumar, B. Satheesh; Chakravarthy, P.; Mathew, Dona; Santhosh, B

doi:10.1080/02670836.2019.1575054

Cited by 55 publications

(24 citation statements)

References 28 publications

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“…The characteristic of these composite materials is the obvious deformation stimulated by Joule heat when electrified. [25,166] Zhu et al [167] noticed that existing micro-origami metamaterials did not respond in time and not programmable in shape. They designed electrothermal micro-origami systems.…”

Section: Electro-responsive Active Mechanical Metamaterialsmentioning

confidence: 99%

Recent Progress in Active Mechanical Metamaterials and Construction Principles

et al. 2021

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Active mechanical metamaterials (AMMs) (or smart mechanical metamaterials) that combine the configurations of mechanical metamaterials and the active control of stimuli-responsive materials have been widely investigated in recent decades. The elaborate artificial microstructures of mechanical metamaterials and the stimulus response characteristics of smart materials both contribute to AMMs, making them achieve excellent properties beyond the conventional metamaterials. The micro and macro structures of the AMMs are designed based on structural construction principles such as, phase transition, strain mismatch, and mechanical instability. Considering the controllability and efficiency of the stimuli-responsive materials, physical fields such as, the temperature, chemicals, light, electric current, magnetic field, and pressure have been adopted as the external stimuli in practice. In this paper, the frontier works and the latest progress in AMMs from the aspects of the mechanics and materials are reviewed. The functions and engineering applications of the AMMs are also discussed. Finally, existing issues and future perspectives in this field are briefly described. This review is expected to provide the basis and inspiration for the follow-up research on AMMs.

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Section: Electro-responsive Active Mechanical Metamaterialsmentioning

confidence: 99%

Recent Progress in Active Mechanical Metamaterials and Construction Principles

et al. 2021

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“…50,51 Graphene-based nanocomposites also show enhanced conductivity, tensile strength, and modulus. 52 Rana et al 53 designed PU prepolymer from 4 0 -methylene bis(phenyl isocyanate) and PCL diol. The nanocomposites showed actuation by resistive heating when an applied 60 V heated the nanocomposite above its 45 C shape memory transition temperature within 6-7 s. The 97% shape recovery and 95% shape retention were observed.…”

Section: Pu/graphene Nanocomposites Actuated By Resistive Heatingmentioning

confidence: 99%

Shape memory polyurethane/graphene nanocomposites: Structures, properties, and applications

Kausar

2019

Journal of Plastic Film & Sheeting

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This review presents an overview of the versatile shape memory polyurethane/graphene nanocomposites. Shape memory polyurethanes can recover their original shape from an intermediate shape when triggered by an external stimulus, such as heat, electrical voltage, light, pH change, or water absorption. Shape memory polymers have a successful history in commercial use. The applications for shape memory polymers are highly varied across numerous industries ranging from aircraft structure to biomedical implants. Three different groups of stimuli-responsive shape memory polyurethane/graphene nanocomposites, thermoresponsive, resistive heating actuated, and photon absorption actuated, will be discussed in this review. The applications of shape memory polyurethane/graphene nanocomposite as actuators are also discussed. This article will be pioneering in widespread impression on the state-of-the-art knowledge in shape memory polyurethane/graphene nanocomposites. It does not intend to be an extensive summary, but instead is a guide for scientists looking to apply these uniquely functional materials for advance high-performance applications. Future research may reveal shape memory applications for polyurethane/graphene nanocomposites in electronics, aerospace, and biomedical industries.

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“…The overall mechanical properties can be enhanced with the incorporation of fiber in shape memory polymer composites (SMPC). Hence, new horizons are created for its application such as aerospace [4], electronics [5], biomedical engineering [6] and textile [7].…”

Section: Introductionmentioning

confidence: 99%

Buckling and vibration analysis of shape memory laminated composite beams under axially heterogeneous in-plane loads in the glass transition temperature region

Tiwari

Shaikh

2021

SN Appl. Sci.

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Buckling and vibration study of the shape memory polymer composites (SMPC) across the glass transition temperature under heterogeneous loading conditions are presented. Finite element analysis based on C° continuity equation through the higher order shear deformation theory (HSDT) is employed considering non linear Von Karman approach to estimate critical buckling and vibration for the temperature span from 273 to 373 K. Extensive numerical investigations are presented to understand the effect of temperature, boundary conditions, aspect ratio, fiber orientations, laminate stacking and modes of phenomenon on the buckling and vibration behavior of SMPC beam along with the validation and convergence study. Effect of thermal conditions, particularly in the glass transition region of the shape memory polymer, is considerable and presents cohesive relation between dynamic modulus properties with magnitude of critical buckling and vibration. Moreover, it has also been inferred that type of axial loading condition along with the corresponding boundary conditions significantly affect the buckling and vibration load across the glass transition region.

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High glass-transition polyurethane-carbon black electro-active shape memory nanocomposite for aerospace systems

Cited by 55 publications

References 28 publications

Recent Progress in Active Mechanical Metamaterials and Construction Principles

Recent Progress in Active Mechanical Metamaterials and Construction Principles

Shape memory polyurethane/graphene nanocomposites: Structures, properties, and applications

Buckling and vibration analysis of shape memory laminated composite beams under axially heterogeneous in-plane loads in the glass transition temperature region

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