Development of a Prototype Elastic Memory Composite STEM for Large Space Structures

Hazelton, C. S.; Gall, Keith; Abrahamson, Erik; Lake, Mark S.; Denis, R

doi:10.2514/6.2003-1977

Cited by 15 publications

(9 citation statements)

References 4 publications

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“…SMP-resin-based composites reinforced by continuous fibers are regarded as the most promising materials for deployable structures in future space applications [33][34][35][36]. The fabrication of high-performance SMP epoxy systems is thus essential.…”

Section: Introductionmentioning

confidence: 99%

A molecular dynamics investigation of the deformation mechanism and shape memory effect of epoxy shape memory polymers

Yang

Wang

Guo

et al. 2016

Sci. China Phys. Mech. Astron.

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Following deformation, thermally induced shape memory polymers (SMPs) have the ability to recover their original shape with a change in temperature. In this work, the thermomechanical properties and shape memory behaviors of three types of epoxy SMPs with varying curing agent contents were investigated using a molecular dynamics (MD) method. The mechanical properties under uniaxial tension at different temperatures were obtained, and the simulation results compared reasonably with experimental data. In addition, in a thermomechanical cycle, ideal shape memory effects for the three types of SMPs were revealed through the shape frozen and shape recovery responses at low and high temperatures, respectively, indicating that the recovery time is strongly influenced by the ratio of E-51 to 4,4'-Methylenedianiline. H. Yang, Z. D. Wang, Y. F. Guo, and X. H. Shi, A molecular dynamics investigation of the deformation mechanism and shape memory effect of epoxy shape memory polymers, Sci.

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Section: Introductionmentioning

confidence: 99%

A molecular dynamics investigation of the deformation mechanism and shape memory effect of epoxy shape memory polymers

Yang

Wang

Guo

et al. 2016

Sci. China Phys. Mech. Astron.

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“…3. Second, deployment path of these four points accommodates the use of many common collapsible, extendible, stiff members such as a Storable Tubular Extendible Member (STEM) 13 , a lenticular tube 14 , or a tape-spring. Fig.…”

Section: Surface Kinematicsmentioning

confidence: 99%

Synchronous Deployed Solar Sail Subsystem Design Concept

Banik¹,

Murphey

2007

48th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference

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A solar sail concept has been developed from a common spiral fold pattern in order to enable a simultaneous mast and sail deployment. This novel concept utilizes the stored strain energy in a series of elastic spar members to enforce proper folding kinematics rather than relying on bulky mechanical joints. The critical inner and outer spar networks are secured to four elastically extendible masts anchored to a central drum. Deployment of the solar sail system is actuated by rotating the central drum around which the masts, spars, and film are wrapped. Tensioned radial cords deterministically unfold the membrane film under the authority of the resilient, spring-like spar members. Proper elastic behavior of the spars is an important facet to this design, and thus a significant effort was dedicated their development. This compact ground demonstration concept includes about 7.5 m 2 of reflective membrane film for useful propulsion. Features of this robust, lightweight membrane structure may prove valuable to reducing mass and increasing deployment reliability of other planar subsystems such as sun shades, solar arrays, radiators, or antenna arrays. Nomenclature L= Side length of polygonal drum R = Drum radius h = Wrapped height n = Number of gores s = Characteristic length of one sail side w = Peak fold shifted distance α = Interior angle of polygonal drum

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“…Leng et al designed and fabricated a deployable hinge based on SMPs and used it in a deployable driving structure for deployable space solar panels [ 44 ]. A smart deployable space antenna with a diameter of 10 m based on SMPs was studied by NASA’s Air Propulsion Laboratory, in which the antenna could be deployed in orbit and the shape of the antenna was further maintained after deployment [ 45 ].…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Space Deployable Structure Based on Shape Memory Polymers

Shi

Feng

et al. 2021

Micromachines

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Shape memory polymers (SMPs) have been applied in aerospace engineering as deployable space structures. In this work, the coupled finite element method (FEM) was established based on the generalized Maxwell model and the time–temperature equivalence principle (TTEP). The thermodynamic behavior and shape memory effects of a single-arm deployment structure (F-DS) and four-arm deployment structure (F-DS) based on SMPs were analyzed using the coupled FEM. Good consistency was obtained between the experimental data and simulation data for the tensile and S-DS recovery forces, verifying that the coupled FEM can accurately and reliably describe the thermodynamic behavior and shape memory effects of the SMP structure. The step-by-step driving structure is suitable for use as a large-scale deployment structure in space. This coupled FEM provides a new direction for future research on epoxy SMPs.

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Development of a Prototype Elastic Memory Composite STEM for Large Space Structures

Cited by 15 publications

References 4 publications

A molecular dynamics investigation of the deformation mechanism and shape memory effect of epoxy shape memory polymers

A molecular dynamics investigation of the deformation mechanism and shape memory effect of epoxy shape memory polymers

Synchronous Deployed Solar Sail Subsystem Design Concept

Numerical Analysis of Space Deployable Structure Based on Shape Memory Polymers

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