Shape memory polymer composite circular and square hollow members for deployable structures

Emmanuel, K.D.C.; Jeewantha, L. H. Janitha; Herath, Madhubhashitha; Epaarachchi, Jayantha; Aravinthan, Thiru

doi:10.1016/j.compositesa.2023.107559

Cited by 12 publications

(2 citation statements)

References 33 publications

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“…Among these, the most common SMPs is the dual SMPs [70]. SMPs have potential applications in smart textiles [64], biomedicine [71], self-healing composite systems [72], civil engineering [73], 3D printing [74] and other fields.…”

Section: Shape Memory Materialsmentioning

confidence: 99%

Fibrous Structures: An Overview of Their Responsiveness to External Stimuli towards Intended Application

Ferreira,

Gonçalves,

Antunes

et al. 2024

Polymers

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In recent decades, the interest in responsive fibrous structures has surged, propelling them into diverse applications: from wearable textiles that adapt to their surroundings, to filtration membranes dynamically altering selectivity, these structures showcase remarkable versatility. Various stimuli, including temperature, light, pH, electricity, and chemical compounds, can serve as triggers to unleash physical or chemical changes in response. Processing methodologies such as weaving or knitting using responsive yarns, electrospinning, as well as coating procedures, enable the integration of responsive materials into fibrous structures. They can respond to these stimuli, and comprise shape memory materials, temperature-responsive polymers, chromic materials, phase change materials, photothermal materials, among others. The resulting effects can manifest in a variety of ways, from pore adjustments and altered permeability to shape changing, color changing, and thermal regulation. This review aims to explore the realm of fibrous structures, delving into their responsiveness to external stimuli, with a focus on temperature, light, and pH.

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Section: Shape Memory Materialsmentioning

confidence: 99%

Fibrous Structures: An Overview of Their Responsiveness to External Stimuli towards Intended Application

Ferreira,

Gonçalves,

Antunes

et al. 2024

Polymers

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“…It is difficult to use as a load-bearing structure. SMPCs have excellent mechanical properties [35][36][37], and they not only have shape memory function [38,39] but also have high stiffness [40] after cooling. The application of SMPCs at the crease and the panel may take into account the functionality and stability of the deployable structure.…”

Section: Introductionmentioning

confidence: 99%

Self-Unfolding Properties of Smart Grid-Reinforced Membrane Origami

Hu,

Xia,

Tao

et al. 2024

J. Compos. Sci.

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Origami-based membrane structures have shown great potential to revolutionize the construction of deployable and lightweight space structures in the future. However, the efficient unfolding mechanism puts forward major challenges to the practical realization of space-deployable structures. Here, a smart grid-reinforced membrane origami (SGRMO) is presented. The unfolding action hinges upon the application of forces facilitated by shape memory polymer composites (SMPCs). Subsequent locking action ensues through the restoration of the initial rigidity, accomplished via cooling mechanisms. This novel structure achieves the required lightweight and functionality by employing the grid design concept and effectively reduces the decline in unfolding extent caused by irreversible plastic deformation at the crease. Its recovery properties, including unfolding angle, distance, and surface precision, are experimentally and analytically investigated under different conditions. The results indicate that the structure can be reliably unfolded into the predefined shapes. In the case of Miura-SGRMO, the optimal surface precision is attained when the angle-ψ registers at 30°. The results of this study are expected to serve as the design of ultra-large flexible solar arrays and deployable antenna structures.

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Enhanced thermo‐mechanical properties of carbon fiber reinforced thermoresistant polymer, a blend of di‐functional epoxy bisphenol A and a tri‐functional epoxy Tactix 742

Anurangi,

Jayalath,

Rani Senevirathna

et al. 2024

Polymer Composites

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Fiber reinforced polymer composite structures are particularly vulnerable to high temperatures as their strength drastically reduces under elevated temperature conditions. Therefore, it is important to improve the thermal stability of such composite structures to expand their potential range of applications. In this study, the effect of mixing two epoxy monomers, DGEBA and Tactix 742, which are di‐ and tri‐functional, respectively, on the thermal stability of their composites is investigated. The thermo‐mechanical analysis of these composites revealed that the glass transition temperature rose from 123 to 229°C when Tactix 742 is increased from 25% to 75%. The thermal resistance property is attributed to a three‐dimensional crosslink network which is initiated by tri‐functional Tactix 742. However, the higher percentage of Tactix led to a reduction in strength, possibly due to decreased crystallinity and formed amorphous phase material. Subsequently, a tensile strength model was employed to assess the performance at elevated temperatures. It was shown that a matrix with a mix of di‐ and tri‐functional monomers is highly promising for manufacturing thermoresistant polymeric composites with robust mechanical properties, thereby expanding their potential applications across various engineering fields such as civil and construction industries.Highlights A thermoresistant matrix by blending di‐ and tri‐functional epoxy monomers. Improved thermo‐mechanical properties and increased glass transition temperature of fiber reinforced composites. Mechanical performance of carbon fiber reinforced composites at elevated temperatures. Validated a model to estimate the tensile strengths of the composites at elevated temperatures.

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Shape memory polymer composite circular and square hollow members for deployable structures

Cited by 12 publications

References 33 publications

Fibrous Structures: An Overview of Their Responsiveness to External Stimuli towards Intended Application

Fibrous Structures: An Overview of Their Responsiveness to External Stimuli towards Intended Application

Self-Unfolding Properties of Smart Grid-Reinforced Membrane Origami

Enhanced thermo‐mechanical properties of carbon fiber reinforced thermoresistant polymer, a blend of di‐functional epoxy bisphenol A and a tri‐functional epoxy Tactix 742

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