Temperature Distributions in Epoxy Resin Plates with Embedded SMA Wires Heated by Supplying Electric Current

Umezaki, Eisaku; Ichikawa, Takeo

doi:10.1299/jsmemecjo.2000.3.0_175

Cited by 4 publications

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“…Note that this transition was thermally induced via Joule heating of the electric current. The temperature development in the SMA wire, embedded in the EP, was also investigated and modelled [ 190 ].…”

Section: Shape Memory Ep/shape Memory Alloy (Sma) Combinationsmentioning

confidence: 99%

Review of Progress in Shape Memory Epoxies and Their Composites

2017

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Shape memory polymer (SMP) is capable of memorizing one or more temporary shapes and recovering successively to the permanent shape upon various external stimuli. Beside of the above mentioned one-way variants, also two-way shape memory polymers (SMPs) and shape memory (SM) systems exist which feature a reversible shape change on the basis of "on-off switching" of the external stimulus. The preparation, properties and modelling of shape memory epoxy resins (SMEP), SMEP foams and composites have been surveyed in this exhaustive review article. The underlying mechanisms and characteristics of SM were introduced. Emphasis was put to show new strategies on how to tailor the network architecture and morphology of EPs to improve their SM performance. To produce SMEPs novel preparation techniques, such as electrospinning, ink printing, solid-state foaming, were tried. The potential of SMEPs and related systems as multifunctional materials has been underlined. Added functionality may include, among others, self-healing, sensing, actuation, porosity control, recycling. Recent developments in the modelling of SMEPs were also highlighted. Based on the recent developments some open topics were deduced which are merit of investigations in future works.

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Section: Shape Memory Ep/shape Memory Alloy (Sma) Combinationsmentioning

confidence: 99%

Review of Progress in Shape Memory Epoxies and Their Composites

2017

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“…Thermal profiles resulting from resistive heating of SMA wires and the impact of their spacing have also been experimentally determined. [428]. New applications have also been developed utilizing the actuation characteristics of SMA-polymer systems.…”

Section: (D)mentioning

confidence: 99%

Review and perspectives: shape memory alloy composite systems

et al. 2015

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Following their discovery in the early 60's, there has been a continuous quest for ways to take advantage of the extraordinary properties of shape memory alloys (SMAs). These intermetallic alloys can be extremely compliant while retaining the strength of metals and can convert thermal energy to mechanical work. The unique properties of SMAs result from a reversible difussionless solid-to-solid phase transformation from austenite to martensite. The integration of SMAs into composite structures has resulted in many benefits, which include actuation, vibration control, damping, sensing, and selfhealing. However, despite substantial research in this area, a comparable adoption of SMA composites by industry has not yet been realized. This discrepancy between academic research and commercial interest is largely associated with the material complexity that includes strong thermomechanical coupling, large inelastic deformations, and variable thermoelastic properties. Nonetheless, as SMAs are becoming increasingly accepted in engineering applications, a similar trend for SMA composites is expected in aerospace, automotive, and energy conversion and storage related applications. In an effort to aid in this endeavor, a comprehensive overview of advances with regard to SMA composites and devices utilizing them is pursued in this paper. Emphasis is placed on identifying the characteristic responses and properties of these material systems as well as on comparing the various modeling methodologies for describing their response. Furthermore, the paper concludes with a discussion of future research efforts that may have the greatest impact on promoting the development of SMA composites and their implementation in multifunctional structures.

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“…Attachment to the host structure will still require a thin epoxy layer, which will add more complexity to the model in any real system with regard to heat transfer capabilites and mechanical response. Corrections for this adhesive layer can be added to reflect fabrication methods, but their effects on the thermal distribution have shown to be low for thin (1-3 mm thick) epoxy layers (Umezaki, 2006) and they will serve to be advantageous in further decoupling thermal from mechanical response of the SMA. Change in mechanical response with additional epoxy layers can also be reduced by keeping this layer as thin as possible, as some models fully remove the epoxy layer from mechanical response (Lagoudas et al, 1997).…”

Section: Smart Joint Designmentioning

confidence: 99%

Methodology for Design of an Active Rigidity Joint

Manzo

Garcia

2008

Journal of Intelligent Material Systems and Structures

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Active control of composite structures has primarily focused on vibration control and other small-scale deformations. For use in morphing aircraft structures, a composite ''smart joint'' is proposed, employing both shape memory alloy and shape memory polymer to replace a conventional rotary actuator. This joint functions as a discrete member capable of both actuation and structural rigidity in user programmable states, with large-scale tip deflections on the order of 10-20% camber. A strain energy model is used to prescribe joint deflection in terms of thermally varying material properties across the thickness of the joint, allowing the designer of a morphing system to select electrical power input and element composition as based on deflection, response speed, and load capacity. This model discretizes the transformation into a multiple step shape change maneuver using the tri-phase process to determine deflection both when heated and when set into its cooled state. Comparison with a finite element model confirms thermodynamics analysis as well as deflection accurate within 2% of analytically predicted behavior.

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Temperature Distributions in Epoxy Resin Plates with Embedded SMA Wires Heated by Supplying Electric Current

Cited by 4 publications

References 0 publications

Review of Progress in Shape Memory Epoxies and Their Composites

Review of Progress in Shape Memory Epoxies and Their Composites

Review and perspectives: shape memory alloy composite systems

Methodology for Design of an Active Rigidity Joint

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