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Showing 1 to 20 of 60 for “"SMAS"”.
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Development and Design of Self-Sensing SMAs using Thermoelectric Effect
Active research of SMAs has shown that its Seebeck coefficient is sensitive to its martensitic phase transformation and has the potential to determine the SMAs state of transformation. The combination of Shape Memory Alloys, which have a positive Seebeck coefficient, and Constantan which has a …
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Exploring crystallographic compatibility in polycrystalline Cu-based shape-memory alloys
Shape-memory alloys (SMAs) are a class of materials that can recover from apparent permanent strain (on the order of 5%) due to a solid-to-solid phase transformation. It has been recently suggested that SMAs satisfying a set of so-called cofactor conditions possess perfect interface compatibility …
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Dislocation slip and twinning stress in shape memory alloys- theory and experiments
… mechanisms governing Shape Memory Alloys (SMAs) plasticity, which results in affecting their pseudoelasticity and shape memory performance. Precisely determining Peierls stress in dislocation slip and critical twin nucleation stress in twinning is essential to facilitate the design of new …
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The effect of small molecule analogues of the immunomodulatory helminth product ES-62 on denritic cell responses
… a drug, a library of small molecule analogues (SMAs) of ES-62 based on its PC moiety has been synthesised. The aim of this project was to investigate the effects of these SMAs on DCs. From a library of 79 compounds, 6 SMAs (11a, 12b, 11e, 11h, 11i and 11k) were selected as they significantly …
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Mechanics of Phase Transformation in NiTi Shape Memory Alloys at The Atomistic Scale
During the past decade, Shape Memory Alloys (SMAs), particularly Nickel-Titanium (NiTi) alloys, have received increasing attention mainly because of their promising role to be integrated into multifunctional systems for actuation, morphing, and sensory capabilities in a broad variety of …
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Computational modeling of size-dependent superelasticity in shape memory alloys
The superelastic effect in shape memory alloys (SMAs) is attributed to the stress-induced reversible austenitic-martensitic phase transformations. It is characterized by the development of significant strains which are fully recoverable upon unloading, and also characterized by the …
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IN SITU SPECTROSCOPY INVESTIGATION OF ALKALI METAL INTERACTION MECHANISM WITH ORGANIC SEMICONDUCTOR FOR STABILIZING ALKALI METAL ANODES
… been proposed to stabilize sodium metal anodes (SMAs), such as optimizing electrolyte compositions, constructing anode hosts, and establishing protective layers. Although recent studies have demonstrated significant improvements in the performance of SMBs, the understanding of interaction …
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Symbiotic Encounter: Shape Memory Alloy Actuators in Architecture
… design and design. Despite growing interest in SMAs for kinetic structures and adaptive facades, there is currently a fragmented understanding of how to leverage their unique properties in the built environment. Designers lack consolidated resources that map the capacities and limitations of …
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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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Generating anatomical substructures for physically-based facial animation.
… the superficial musculoaponeurotic system (SMAS – a layer of fascia investing and interlinking the mimic muscle system), and mimic muscles for any given 3D face model. This is done toward (the goal of) a production-viable framework or rig-builder for physically-based facial animation. This …
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Shape Memory Alloys for small scale actuation
Shape Memory Alloys (SMAs), materials that can undergo a fully recoverable strain change due to a thermal cycle, and which can be produced in a form that is superelastic are only utilized limitedly. In this thesis, I investigated the relationship between the material properties of shape memory …
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Computational framework for simulating the deformation and fracture response of oligocrystalline shape memory alloys
Shape memory alloys (SMAs) are a class of metallic materials that can recover their original shapes when heated above a certain temperature. Unique features including the superelasticity and shape memory effect have made SMAs attractive materials for a variety of fields ranging from bioengineering …
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Advanced experimental characterization of deformation mechanisms and temperature changes on novel alloys systems
… Among many, shape memory alloys (SMAs) and high entropy alloys (HEAs) are presently of great research interest in material science and engineering community. Unlike conventional alloys, the former exhibits astonishing recoverability from excessive deformation and the latter …
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Thermodynamic modeling of martensitic transformations in shape memory alloys.
The unusual properties of shape memory alloys (SMAs) are due to solid-to-solid martensitic transformations (MTs) which correspond to a lattice level instability of the crystal structure. Currently, there exists a shortage of material models that can capture the details of lattice level MTs …
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Design and Analysis of Energy Harvesting with Shape Memory Alloy
Shape memory alloys (SMAs) are metallic alloys made of Titanium & Nickel to retain a specific shape by undergoing a heating process. The shape memorization occurs via a temperature dependent phase transformation process between two crystal structures, austenite phase and martensite phase. Typical …
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The Perceptions of Shared Medical Appointments among Health Care Workers at Parkland Hospital's Community Oriented Primary Care Clinics
INTRODUCTION: Shared Medical Appointments (SMAs) are a novel way of delivering health care to patients in a group setting. Past research regarding SMA quality improvement have always been patient focused. There is a great deal in the literature that shows that patients perceive SMAs favorably and …
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Experimental testing and constitutive modeling of concrete confined with shape memory alloys
… concrete behavior under confinement provided by SMAs. This research aims at addressing five main issues related to this new confinement technique. These issues are: 1) the relatively high cost of the commonly used Ni-based SMAs, which limits the widespread application of this new technique; 2) …
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Immunomodulatory effects of the filarial nematode product, ES-62, and phosphorylcholine-based small molecule analogues S3 and S5 in experimental autoimmune encephalomyelitis
… and, along with small molecule derivatives (SMAs), could have therapeutic potential in MS. Methods: 7 to 9 week old C57BL/6 wild type mice were immunized to induce experimental autoimmune encephalomyeltis (EAE) with MOG35-55 and were treated with PBS (Control group), ES-62, or SMAs S5 or S3. …
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Instrumented Nanoindentation Studies Of Deformation In Shape Memory Alloys
… nickel titanium (NiTi) shape memory alloys (SMAs) are a class of materials characterized by their unique deformation behavior. In these alloys, deformation mechanisms such as mechanical twinning and stress induced phase transformation between a high symmetry phase (austenite) and a low …
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Modification and Integration of Shape Memory Alloys Through Thermal Treatments and Dissimilar Metal Joining
While Shape Memory Alloys (SMAs) have been the topic of numerous studies throughout their history, over fifty years after the first observation of the shape memory effect, their widespread use is still limited by the complexity of tuning the shape memory response and furthermore the difficulty in …
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