Design and Testing of an Elastic Memory Composite Deployment Hinge for Spacecraft

Beavers, Fred; Munshi, N. A.; Lake, Mark S.; Maji, Arup; Qassim, Karim; Carpenter, Bernie F.; Rawal, Shristi

doi:10.2514/6.2002-1452

Cited by 23 publications

(18 citation statements)

References 6 publications

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“…5a) and optimized the cross section of the SMPC to an arc for greater driving torque (Fig. 5b) [25,97,98]. Figure 6a is a hinge designed by Lan et al, which consists of two SMPC sheets with a curvature of 120 • , and is actuated by a thin-film heater attached to the surface of the composite [99,100].…”

Section: Applications In Aerospacementioning

confidence: 99%

“…Shapememory polymers and their composites have many advantages, such as high malleability, highly adjustable transition temperature, various driving methods, low impact during deployment, and biocompatibility. All of these properties have potential applications in a wide range of fields including aerospace, flexible electronics, and bioengineering [23][24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Mechanical Models, Structures, and Applications of Shape-Memory Polymers and Their Composites

Xin

Liu

et al. 2019

Acta Mech. Solida Sin.

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Shape-memory polymers (SMPs) and their composite materials are stimuliresponsive materials that have the unique characteristics of lightweight, large deformation, variable stiffness, and biocompatibility. This paper reviews the research status of the mechanical models for SMPs, shape-memory nanocomposites and shape-memory polymer composites (SMPCs); it also introduces some spatially deployable structures, such as hinges, beams, and antennae based on SMPCs. In addition, the deformation types of 4D printing structures and the potential applications of this technology in robots and medical devices are also summarized.The mechanism of shape-memory cycles and the mechanical behavior of SMPs can be described by establishing thermomechanical models, which lay the theoretical foundations for the rational design of SMP structures. This section will focus on the constitutive models for SMPs, the micromechanical models of SMPNs, and the buckling behavior of SMPCs.

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Section: Applications In Aerospacementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Mechanical Models, Structures, and Applications of Shape-Memory Polymers and Their Composites

Xin

Liu

et al. 2019

Acta Mech. Solida Sin.

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“…The next important milestone in the development of SMPs is the application of heat shrinkable tubes and heat shrinkable films in the 1960s [11][12][13][14]. Nowadays, after decades of development, SMPs have been successfully used in many fields, such as aerospace [15][16][17][18], biomedical [19][20][21][22][23], and smart appliances [24]. Compared with shape memory alloys (SMAs) and shape memory ceramics (SMCs), SMPs have the advantages of lower density, higher strain (up to 800% [25]), excellent processability, good chemical stability, biocompatibility [20,22], and an adjustable biodegradation rate [26].…”

Section: Introductionmentioning

confidence: 99%

Effect of PEW and CS on the Thermal, Mechanical, and Shape Memory Properties of UHMWPE

et al. 2020

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Modified ultra-high-molecular-weight polyethylene (UHMWPE) with calcium stearate (CS) and polyethylene wax (PEW) is a feasible method to improve the fluidity of materials because of the tense entanglement network formed by the extremely long molecular chains of UHMWPE, and a modified UHMWPE sheet was fabricated by compression molding technology. A Fourier-transform infrared spectroscopy test found that a new chemical bond was generated at 1097 cm−1 in the materials. Besides, further tests on the thermal, thermomechanical, mechanical, and shape memory properties of the samples were also conducted, which indicates that all properties are affected by the dimension and distribution of crystal regions. Moreover, the experimental results indicate that the addition of PEW and CS can effectively improve the mechanical properties. Additionally, the best comprehensive performance of the samples was obtained at the PEW content of 5 wt % and the CS content of 1 wt %. In addition, the effect of temperature on the shape memory properties of the samples was investigated, and the results indicate that the shape fixity ratio (Rf) and the shape recovery ratio (Rr) can reach 100% at 115 °C and 79% at 100 °C, respectively, which can contribute to the development of UHMWPE-based shape memory polymers.

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“…When reheating the material above T g , it recovers to its original shape [17][18][19][20]. Shape memory property, the most distinguished property of SMP/SMPC, has made the material a promising choice for deployable structures since the structures can be packaged and deployed without complex mechanical devices [29][30][31][32][33][34][35]. There would be a variety of applications of SMPC on spacecraft, such as trusses, radiators, and solar arrays [29][30][31][32][33][34][35].…”

Section: Introductionmentioning

confidence: 99%

Ground and geostationary orbital qualification of a sunlight-stimulated substrate based on shape memory polymer composite

Liu

Lan

et al. 2019

Smart Mater. Struct.

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A sunlight-stimulated substrate, named Mission SMS-I, carried out the orbital deployment experiment and anti-irradiation verification on an experimental geostationary satellite. It is the prototype of a solar array substrate which integrates the conventional substrate, support structure, and deployment function by using the carbon fabric reinforced shape memory polymer composite (SMPC). The substrate could deploy from the 'Ω' packaged configuration to the '-' deployed configuration once its temperature is at or above the glass transition temperature. This paper presents details of the Mission SMS-I in a sequence of material preparation, structure design, manufacture, ground experiments, and orbital experiment. Results show that the Mission SMS-I can withstand the required mechanical and thermal conditions, successfully deploy in orbit and have a good long-term anti-irradiation capability. SMPC is a suitable choice for the substrate of solar arrays or any other deployable structures which need the actuation in materiallevel or directly exposed to the space environment.

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Design and Testing of an Elastic Memory Composite Deployment Hinge for Spacecraft

Cited by 23 publications

References 6 publications

Mechanical Models, Structures, and Applications of Shape-Memory Polymers and Their Composites

Mechanical Models, Structures, and Applications of Shape-Memory Polymers and Their Composites

Effect of PEW and CS on the Thermal, Mechanical, and Shape Memory Properties of UHMWPE

Ground and geostationary orbital qualification of a sunlight-stimulated substrate based on shape memory polymer composite

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