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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 69 for “"magnetostrictive"”.
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Piezoelectric and Magnetostrictive Transducers
Made available in DSpace on 2014-12-04T21:03:03Z (GMT). No. of bitstreams: 1 5805501.pdf: 8039716 bytes, checksum: b087be9bf8848dbe16937d1aa3bd5632 (MD5) Previous issue date: 1958
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Spherical indentation of magnetostrictive materials
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1999.
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Design and optimization of magnetostrictive actuator
… are full of potential MS and MRF applications. Magnetostrictive technology and Magneto-Rheological Fluid technology have been successfully employed in some low and high volume applications A structure based on "MSm-technology might be the next generation in design for products where power …
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Dynamic transduction characterization of magnetostrictive actuators
… transduction or input/output representations for magnetostrictive actuators. This transduction model is developed through application of an electro-magneto-mechanical impedance modeling approach which combines both the mechanical dynamics and coupled behavior of the actuator device. Lumped and …
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Miniaturized Magnetostrictive Antennas for Wireless Sensing Applications
Magnetostrictive (MES) antennas have been widely used for wireless sensing applications. Miniaturization of MES antennas can open new applications in in-vivo wireless sensing with higher spatial resolution and solve challenges involved in the miniaturization of conventional electromagnetic …
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ABNORMAL GRAIN GROWTH IN MAGNETOSTRICTIVE GALFENOL ROLLED SHEET
… to provide easy magnetization, enhanced magnetostrictive performance and a cost-effective option for production of these alloys for use in applications as sensors and actuators. In this study, 1-2.5% NbC added Galfenol rolled sheet was used because NbC particles enhance the rollability of …
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Measurement of linear position using a magnetostrictive wire
… components and to be based on transmission of magnetostrictively generated pulses in nickel wire. In addition it was to be able to operate in a harsh environment (e.g. underwater) where alternative devices would not function. While an accuracy objective was not established, it was hoped to be …
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Magnetostrictive Particle Tagging of Epoxy and Epoxy Composites for Self Assessment of Damage
… a comprehensive look at the feasibility of using magnetostrictive tags to detect damage in a structural composite. The brittle nature of the failure process of polymer matrix composite poses a technical challenge for their introduction in structural applications. Thus, there is a critical need to …
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Electrodeposition of High Magnetostrictive Cobalt Iron Alloy Films for Smart Tags and Sensor Applications
<p>Magnetostrictive CoFe films were investigated for use as magnetoelastic tags or sensors. The ability to electrodeposit these films enables batch fabrication processes to pattern a variety of geometries while controlling the film stoichiometry and crystallography. In current research looking at …
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Magnetic Field Sensing via Multi-Material Acoustic Sensing Optical Fibers with Magnetostrictive Cladding Inclusions
… research uses the DAS technology in tandem with magnetostrictive materials to create a distributed multi-material optical fiber magnetic sensor. Magnetic sensing has high demand across different fields and often runs into challenges of extreme environments including high temperature, corrosion, …
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Development and Validation of a Bidirectionally Coupled Magnetoelastic FEM Model for Current Driven Magnetostrictive Devices
… model to capture the magnetoelastic behavior of magnetostrictive materials subjected to elastic stresses and magnetic fields applied not only by permanent magnets but also by current carrying coils used often in transducer applications. This model was implemented by combining finite element …
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Phase transformations in highly electrostrictive and magnetostrictive crystals: structural heterogeneity and history dependent phase stability
… (PMN-xPT) and highly magnetostrictive Fe-xat.%Ga are two such novel materials. Both materials systems have chemical disorders and structural inhomogeneity on a microscale, giving rise to an interesting diversity of crystal structures and novel macroscopic physical …
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A finite element approach for the implementation of magnetostrictive material terfenol-D in automotive CNG fuel injection actuation
… In applications broadly defined for actuation, magnetostrictive material Terfenol-D possesses intrinsic rapid response times while providing small and accurate displacements and high-energy efficiency, which are some of the essential parameters required for fast control of fuel injector valves …
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Optical Fiber Fabry-Perot Interferometer based Sensor Instrumentation System for Low Magnetic Field Measurement
… the sensor system is based on the detection of magnetostrictive dimensional changes in the sensor gage using a modified extrinsic Fabry-Perot Interferometer configuration. Because of the magnetostrictive reflector the gap length depends on the magnetic fields applied to the sensor. Since the …
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Terfenol based optical phase modulator and magnetometer
Two new fiber optic magnetostrictive phase modulators and magnetometers using the highly magnetostrictive rare-earth iron compound Tb<sub>x</sub>Dy<sub>l-x</sub>Fe₂ are investigated. They demonstrated to have a high sensitivity, dynamic range, minimum field detectability, and a better structural …
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Multimaterial Fiber Sensors for Physical Measurements
… integration of silica optical fiber sensors into magnetostrictive composite materials for distributed magnetic field sensing. A series of Fiber Bragg Gratings (FBGs) were inscribed in the core of a silica fiber, which was then thermally embedded at the center of a magnetostrictive composite made …
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Framework for a Unified Macroscale Model of Magnetostriction
… to experimental data performed for several magnetostrictive materials will show that the model accurately predicts the behavior of Terfenol-D while two different iron gallium alloys are modeled with varying accuracy. Next, this dissertation attempts to expand the 1D model to two dimensions. …
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Hybrid spintronics and straintronics: An ultra-low-energy computing paradigm
… material in intimate contact with a magnetostrictive layer. When a tiny voltage of few millivolts is applied across the structure, it generates strain in the piezoelectric layer and the strain is transferred to the magnetostrictive nanomagnet. This strain generates magnetostrictive …
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Estudo de sensor de campo magnético baseado em fibra óptica com rede de Bragg e Filme Fino de Terfenol-D
… grating inscribed and coated with a Terfenol-D magnetostrictive thin film. When an external magnetic field is applied, the magnetostrictive thin film presents a strain that will be transmitted to the optical fiber. The strain will be detected by the displacement of the wavelength reflected by …
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