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Showing 1 to 20 of 107 for “"strain gauges"”.
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Simulation and Experimental Testing of Additively Manufactured Strain Gauges
… simulations are employed to assess possible strain gauge designs and orientations. Results indicate that adding features such as end loops to embedded 3D printed sensors can reduce errors. Fabricating specimens at steep build orientations can change the resistance properties and cause …
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Fluid flow measurement using electrical and optical fibre strain gauges.
… the fluid flow on the sensors are measured using strain gauges. Multidirectional fluid flow measurement has been made possible by vectorial addition of the orthogonal flow components. The fluid speed and direction are generated irrespective of each other. Electrical resistance strain gauges are …
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Flexible/stretchable strain gauges based on single-crystalline silicon for biomedical applications
Made available in DSpace on 2013-05-28T19:20:07Z (GMT). No. of bitstreams: 2 Abid_Ameen.pdf: 1466741 bytes, checksum: e8d60ff19d9c0a0c95e085476fe62e82 (MD5) license.txt: 4057 bytes, checksum: efb75a2aa9c2973babf832e08f0cb6df (MD5)
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The Fabrication of Integrated Strain Sensors for “Smart” Implants using a Direct Write Additive Manufacturing Approach
… this PhD research is to fabricate an integrated strain gauge that is able to monitor implant strain for diagnosis of the bone healing process. The research work presents a method of fabricating electrical resistance strain gauge sensors using rapid and mask-less process by experimental …
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Effect of radiation on silicon and borosilicate glass
… gamma irradiations were unexpected. Silicon MEMS strain gauges mounted on glass wafers were gamma-irradiated to hundreds of Mrad. Based on expectations from the literature, the Pyrex was supposed to compact to a level easily measurable by the MEMS strain gauges. Almost no substrate compaction …
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Damage detection in composite materials using acoustic emission and self-sensing fibres
… to the acoustic emission testing the changes in strain for the resin samples was recorded using electrical resistance strain gauges and fibre Bragg gratings. Acoustic emission testing of Self-sensing fibre composites allowed the recorded changes in the light intensity transmitted by the fibres to …
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Dual-Use Strain Sensors for Simultaneous Strain Measurement and Acoustic Source Location
The use of metal strain gauges and ultrasonic transducers have long been studied in the field of Nondestructive Evaluation (NDE) as a part of structural health monitoring (SHM). Strain gauges use electrical resistance to monitor strains during the loading of a component. Ultrasonic transducers are …
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Determinação da fluência do concreto e do coeficiente de Poisson diferido em um estado de tensões de compressão bi-axial
Present and analyse the first results of direct strain measurement in the concrete of the test slab (prestressed slab in two directions) of the Laboratório de Estruturas do Centro de Tecnologia da Universidade Federal do Rio de Janeiro. The purpose of the work is to observe the creep of the …
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Quasi-Static Structural Analysis of an Experimental Aircraft Wing
… on the wing structure to determine critical strain locations and optimal sensor distribution. Subsequent mechanical experimentations are performed using a bending test to measure the strain at critical locations along the wing structure using resistive uniaxial strain gauges. To verify the …
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Increasing Signal to Noise Ratio and Minimising Artefacts in Biomedical Instrumentation Systems
… (X-Plane) movement of the electrode using two strain gauges, which were separated by 90° and fitted onto the electrode. The detected motion was fed back to the system for the removal of any motion artefact. The research started by emphasising the importance of minimising motion artefacts from …
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Testing and characterization of carbon nanotubes as strain sensors
… using carbon nanotube coated flexible cloth as strain gauges was studied. Samples were prepared by sonicating strips of cloth inside a 1mg/ml carbon nanotube in propylene carbonate solution. A dynamic mechanical analyzer was built that applied uniaxial cyclical strains to the samples and …
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Field Test of a Bridge Deck with Glass Fiber Reinforced Polymer Bars as the Top Mat of Reinforcement
… in the field under service conditions. The strains and deflections in the span reinforced with GFRP in the top mat were recorded under a series of truck crossings, and these were compared to the span reinforced with all steel bars under identical loading conditions, as well as design values …
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Performance of a Bridge Deck with Glass Fiber Reinforced Polymer (GFRP) Bars as the Top Mat of Reinforcement
… initial testing performed one year earlier. The strains and deflections of the bridge deck were recorded and the two spans compared. Transverse stresses in the GFRP bars, girder distribution factors, and dynamic load allowances were calculated for both spans. From the live load tests, it was …
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Characterizing Engineered Skeletal Muscle Rings as Actuators Using Strain Sensing Methods
… skeletal muscle rings. The instrument uses strain gauges to transduce a muscle ring contraction and has a verified resolution of 5 μN and 1.4 μm over the ranges of 5 μN and 1400 μm respectively. Experiments were carried out with four muscle ring specimens at six different structural …
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Structural Behavior of the Maxilla Under Lateral Load Application
… resistance for the maxilla could be determined. Strain gauges were placed in dry skulls and lateral loads were applied in five different anterior-posterior positions. The results show a highly significant position by gauge interaction (F= 3.467, P. < .005). A loading position at approximately the …
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The effect of stiffener dimensions on the buckling of webplates subjected to bending
… buckle-crests to be pin pointed in order to fix strain gauges in the appropriate positions.<br/><br/>As a result of the contour plots, positions were fixed for the strain gauges for use during the failure tests and the layouts are shown at the beginning of the section of Chapter (6) on …
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Performance Analysis and Modeling of Pavements with a Cold Central Plant Recycled Base under Accelerated Loading Testing
… mixture. Each section was instrumented with strain gauges, pressure cells, and thermocouples. A heavy vehicle simulator (HVS) was used to load three replicate test sections in each lane, with the temperature controlled at 39°C at a depth of 1.5 inches. Results from the instrument verification …
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Finite Element Modelling and On-Site Measurements for Roof Mounted Photovoltaic Solar Panels under High Wind Load
… simultaneous experiment designed to measured strain within same period. The second investigation involved instrumenting a full-scale PV solar panel specimen with 13 half-bridge strain gauges on both surfaces of the PV solar panel, which were used to measure strain values in longitudinal and …
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High strain rate properties of materials using Hopkinson bar techniques
This dissertation examines the high strain rate mechanical properties of polymers, polymer bonded explosives and solders. In addition, it examines experimental developments that will allow more detailed investigation of these properties in the future. The split Hopkinson pressure bar is a standard …
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