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Showing 1 to 20 of 55 for “"nitinol"”.
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Structural Behavior of Nitinol Microflaps
Finite element models of the SMAT microflap and DMA specimens were created by incorporating a user material subroutine SMA-UMAT in ABAQUS. Model results were verified by correlation with the DMA experimental results. The structural behavior of a SMAT microflap was then analyzed and the results were …
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Pulsatile Electropolishing of Nitinol Stents
… equivalent or better than other electropolished Nitinol surfaces from literature with a breakdown potential >1V vs SCE, and a similarly high repassivation potential. Balancing the charge in the anodic and cathodic pulses was the key to minimizing the resulting surface roughness, and eliminating …
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Nitinol-reinforced shape-memory polymers
… based thermoset shape-memory polymer and nitinol wires. A rectangular shape-memory polymer measuring approximately 1 by 2 by 0.1 inches has a ten fold increase in actuation force under three-point bending when reinforced with two 0.02 inch diameter nitinol wires. A constitutive model for …
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Development of a Nitinol heat engine
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1980.
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An experimental investigation of the behavior of Nitinol
… and shape memory effect characteristics from nitinol wire whereby mechanical properties associated with the material are determined. Phenomena such as the R-phase and stress induced martensite serration are investigated. A one-dimensional constitutive model is presented that quantitatively …
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Surface integrity of laser cutting nitinol shape memory alloy
… for product performance and functionality. Nitinol, a nearly equiatomic nickel-titanium shape memory alloy, has been widely used to fabricate vascular stents due to the excellent mechanical properties, fatigue and corrosion resistance, and biocompatibility. The challenges for manufacturing …
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Long-term patency of nitinol stent placement in dysfunctional hemodialysis
… analysis the factors affecting the patency of nitinol stent. Materials and methods: Eighty-three patients with dysfunctional dialysis shunts underwent bail-out stenting to restore vascular access. The indications included 1) residual stenosis more than 50% after percutaneous transluminal …
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Osseointegration einer mit Plasma-Immersions-Ionen-Implantation behandelten Autokompressionsklammer aus Nitinol
… beschichteten Autokompressionsklammer aus Nitinol im Seitenvergleich mit einer unbehandelten Klammer an sieben Beagle-Hunden überprüft. Aufgrund der Autokompressionsklammer war ein gleichzeitiger Vergleich der Heilung mit bzw. ohne Kompression möglich. Die Einheilzeit betrug drei Wochen. …
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Material Characterization of Nitinol Wires for the Design of Actuation Systems
… on nickel-titanium alloy wire, also known as nitinol, to determine the plausibility of designing an actuator using this wire as the method of actuation. These tests have been designed to fully characterize how the wire behaves under steady state and transient conditions allowing for a specific …
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Real-time control of industrial robots for shape setting Nitinol rods
… Additionally, these robots are used to bend a Nitinol rod into a desired shape and a hardware system has been built to shape-set Nitinol rods with Joule heating.
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Active dynamic response tuning of adaptive composites utilizing embedded nitinol actuators
Adaptive composites utilizing embedded nitinol fibers have the unique ability to change their material properties, induce large internal distributed forces in a structure, and can modify the stress and strain distribution within a structure in a controlled manner. In this study, nitinol fibers are …
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Impact failure modes of graphite epoxy composites with embedded superelastic nitinol
… with 3% and 6% volume fractions of superelastic nitinol fibers. Quasi-static tests were performed on wide clamped-clamped beams to identify progressive damage mechanisms. Low velocity (13.9 ft/s) impact tests, at an impact energy of 31.5 ft-lbs, resulting in complete penetration were also …
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MODELING OF THERMO-MECHANICAL BEHAVIOR OF NITINOL ACTUATOR FOR SMART NEEDLE APPLICATION
… with shape memory alloy (SMA) wires, namely Nitinol, due to their unique properties such as super-elasticity, shape memory effect, and biocompatibility. For accurate steering of the smart needle, there is a need to understand Nitinol thermo-mechanical behaviors. Various existing SMA …
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Seeding of Titanium Surfaces and Nitinol Stents with Blood-Derived Endothelial Cells
… and function under arterial flow; and (3) nitinol stents seeded with ECs at the point of care will remain adherent and functional after stent deployment and arterial fluid shear stress conditions <italic>in vitro</italic> and <italic>in vivo</italic>. Based on the experiments reported …
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Assessing the opportunity to produce Nitinol medical device components using additive manufacturing
Nitinol is an important alloy for medical device applications due to its exceptional combination of strength and elasticity. Most Nitinol is produced in wire form and then braided or laser cut into the complex geometries needed for medical device applications. These manufacturing processes are …
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Thermoelastic control of adaptive composites for aerospace applications using embedded nitinol actuators
… structures. Increasing volume fractions of nitinol wire were embedded in cross-ply graphite/ epoxy composite panels. The potential of this approach was evaluated by measuring the change in longitudinal strain with increasing temperature and volume fraction. Reduction of thermal expansion is …
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An investigation of the interfacial characteristics of nitinol fibers in a thermoset composite
… on the interfacial characteristics between a nitinol fiber and a composite matrix. First, rough, clean fiber surfaces were found to provide the best adhesion to the matrix due to the mechanical interaction of the matrix with the rough surface finish. Second, it was determined that the …
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Processing-surface integrity-fatigue relationship in electrical discharge machining of nitinol shape memory alloy
Nitinol is a nearly equiatomic nickel-titanium shape memory alloy (SMA) with two unique properties, i.e., thermal shape memory and superelasticity. Nitinol has broad applications in medical device, aerospace, actuator, machine tool, and civil industries due to its excellent mechanical properties, …
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Prototype utilizing elastocaloric phenomena to demonstrate surface-to-air convection cooling cycle with nitinol
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-10-20 without embargo terms
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The performance of nitinol shape memory alloy actuators embedded in thermoplastic composite material systems
… for intelligent material systems is made of nitinol or shape memory alloy wire. In order for nitinol and other actuators to be a reliable part of the system, the effect of composite manufacturing on the actuators’ performance and behavior must be determined. The results of a study …
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