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Showing 1 to 16 of 16 for “"Shape memory materials"”.
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Shape memory materials : crystallographic texture and its consequences
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2000.
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Constitutive equations for superelasticity in crystalline shape-memory materials
… constitutive model for polycrystalline shape-memory materials has been developed. The model has been implemented in a finite-element program. Finite-element calculations of polycrystal response were performed using two methods: (1) The full-finite element method where each element …
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Magnetic Microstructure and Actuation Dynamics of NiMnGa Magnetic Shape Memory Materials
Magnetic shape memory (MSM) materials are a new class of smart materials which exhibit shape deformation under the influence of an external magnetic field. They are interesting for various types of applications, including actuators, displacement/force sensors, and motion dampers. Due to the huge …
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Aerogels for energy storage applications: From shape memory materials to thermites and explosives
… reduction compared to dense objects. Those materials can have applications in different classes of energy storage and the two types that are focused in this dissertation are mechanical energy and thermal energy storage. Shape memory materials can store and recover elastic deformation energy …
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Computational Modeling of Elastic and Transformation Incompatibility at Grain Boundaries in Shape Memory Materials
Shape memory alloys (SMAs) and zirconia-based ceramics (SMCs) find a wide range of applications in various fields due to their unique properties such as superelasticity and shape memory effect. Desirable superelastic properties of shape memory materials are realized to their maximum extent in …
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Effects of processing on microstructure and properties of Ti-Ta Alloys
Titanium-Tantalum shape memory materials have widespread potential in biomedical applications due to their high degree of biocompatibility, favorable mechanical properties, high corrosion resistance and the possibility of exhibiting shape memory behavior 5' 6, 9. However, this system faces …
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Identification, Simulation and Control of an Ankle Foot Orthosis
… of an identified model for a torsional shape memory alloy-based ankle foot orthosis for drop foot disorder. The model has been developed in stages. First, a dynamic model of ankle in walking is developed using identification method. A dynamic model of torsional shape memory materials is …
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Towards integrated silicon photonic architectures for quantum information processing
… integrated circuits. The potential use of shape-memory materials for straining silicon waveguides to induce refractive index shifts is explored through finite-element simulations.
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Extraction of Superelastic Parameter Values from Instrumented Indentation Data
Interest in superelastic (and shape memory) materials continues to rise, and there is a strong incentive to develop techniques for monitoring of their superelastic characteristics. This is conventionally done via uniaxial testing, but there are many advantages to having a capability for obtaining …
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Shape memory ceramics in small volumes
Shape memory ceramics rely on martensitic transformations which are similar to those found in metallic shape memory materials, but ceramics offer several advantages over metals such as higher operating temperatures and larger transformation stresses. However, polycrystalline shape memory ceramics …
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Towards Crack-Resistant Polycrystalline Zirconia Shape-Memory Ceramics with Low Hysteresis
A new class of shape memory materials has been proposed based on zirconia-based ceramics, which offer higher work output, transformation temperatures, and possibly environmental resistance compared to metallic shape-memory alloys. Despite these potential benefits, two shortcomings have prevented …
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Thermo-mechanical characterization of carbon-reinforced shape memory polymer
Shape memory materials (SMM) are those materials that possess the inimitable quality of remembering their shapes. They recover their original shapes upon exposure to external stimulus like heat, light, electric field, magnetic field, moisture etc. Types of SMMs include shape memory alloys (SMAs), …
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NOVEL SHAPE MEMORY AND MULTI-SHAPE MEMORY POLYMERS FOR BIOMATERIAL APPLICATIONS
… natural environment. In this work, advanced shape memory polymers (SMPs) that respond to non-thermal triggers and multi-shape memory materials capable of multiple topographical transitions were developed for advanced active cell culture platforms. </p> <p> The first part of this dissertation …
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Transmission Electron Microscopy Studies In Shape Memory Alloys
… with strain recovery that results in the shape memory effect. Ternary elemental additions such as Fe can additionally introduce an intermediate rhombohedral (R) phase between the cubic and monoclinic phase transformation. This work was initiated with the broad objective of connecting the …
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Interactions of Cellulose Nanocrystals in Colloidal and Composite Systems
Cellulose nanomaterials (CNMs) have been widely studied for their potential as sustainable fillers in polymer nanocomposites, optical responsiveness in suspensions and thin films, and their orientation-dependent liquid crystalline behavior in suspensions. Cellulose nanocrystals (CNCs) have seen a …
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Výpočtové modelování a analýza využitelnosti materiálů s tvarovou pamětí pro aplikace v oblasti mechatronických aktuátorů
Tato bakalářská práce se zabývá výpočtovým modelováním materiálů s tvarovou pamětí a jejich aplikací v aktuátorech. Rešeršní část práce vysvětluje základní princip fungování materiálů s tvarovou pamětí, různé možnosti jejich využití a modelování, a také princip návrhu aktuátorů s využitím těchto …