Relevant bibliographies by topics / Strain gauge technique

Academic literature on the topic 'Strain gauge technique'

Author: Grafiati
Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "Strain gauge technique"

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Gallage, Chaminda, and Chamara Jayalath. "Use of Particle Image Velocimetry (PIV) technique to measure strains in geogrids." E3S Web of Conferences 92 (2019): 12007. http://dx.doi.org/10.1051/e3sconf/20199212007.

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Geosynthetics are widely used in Geotechnical Engineering to reinforce soil/gravel in pavements, retaining wall backfills, and embankments. It is important to measure strains in geogrids in the determination of their strength parameters such as tensile strength and secant stiffness, and in evaluating their performances in geogrid-reinforced structures. Strain gauges are commonly used in measuring strains in geogrids. However, it is important to verify the strains measured by strain gauges as these strains are affected by the data logging device, gauge factors, quality of bonding between grain gauge and geogrid, and temperature. Therefore, this study was conducted to verify the performance of strain gauges attached to Geogrids and also to investigate the possibility of using PIV technique and GeoPIV-RG software to measure the local strains developed in a geogrid specimen under tensile testing in the laboratory. In the experimental program of this study, six composite geogrid specimens were tested for tensile strength (wide-width tensile tests) while measuring/calculating its tensile strain by using strain gauges attached to the specimens, Geo-PIV-RG analysis and crosshead movements of Instron apparatus. Good agreement between the strains obtained from strain gauges and geoPIV-RG analysis was observed for all the tests conducted. These results suggest that the PIV technique along with geoPIV-RG program can effectively be used to measure the local strain of geogrids in the laboratory tests. It was also able to verify that properly installed strain gauges are able to measure strain in the geogrids which are used in the field applications.
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Bicalho, AA, ADCM Valdívia, BCF Barreto, D. Tantbirojn, A. Versluis, and CJ Soares. "Incremental Filling Technique and Composite Material—Part II: Shrinkage and Shrinkage Stresses." Operative Dentistry 39, no. 2 (March 1, 2014): e83-e92. http://dx.doi.org/10.2341/12-442-l.

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SUMMARY Objectives Finite element analysis (FEA) was used to study polymerization shrinkage stress in molars restored with composites and to correlate those stresses with experimentally measured tooth deformation. Methods Three composites (Filtek LS, Aelite LS Posterior, Filtek Supreme) and three filling techniques (bulk, 2.0-mm increments, and 1.0-mm increments) for restoring a molar were simulated in a two-dimensional FEA. Polymerization shrinkage was modeled using post-gel shrinkage, which was measured using the strain gauge technique (n=10). Cuspal tooth deformation, measured at the buccal and lingual surfaces with strain gauges in a laboratory study, was used to validate the analysis. Residual shrinkage stresses were expressed in modified von Mises equivalent stresses. Linear Pearson correlations were determined between the laboratory and FEA results. Results Post-gel shrinkage values (in volume %) were: Filtek LS (0.11 ± 0.03) < Aelite LS Posterior (0.51 ± 0.02) < Filtek Supreme (0.62 ± 0.09). The 1.0-mm increment filling caused substantially higher stresses and strains in the cervical enamel region. Significant correlations were found between: elastic modulus and FEA strain, elastic modulus and FEA stress, post-gel shrinkage and FEA strain, post-gel shrinkage and FEA stress, FEA strain and cuspal deformation by strain gauge, and FEA stress and cuspal deformation by strain gauge (p<0.05). Conclusions Increasing the number of increments and high post-gel shrinkage and/or elastic modulus values caused higher stresses in the remaining tooth structure and tooth/restoration interface. Cuspal deformation measured with the strain gauge method validated the finite element analyses.
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Elmahdy, Ahmed, and Patricia Verleysen. "Challenges related to testing of composite materials at high strain rates using the split Hopkinson bar technique." EPJ Web of Conferences 183 (2018): 02021. http://dx.doi.org/10.1051/epjconf/201818302021.

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The design of sample geometries and the measurement of small strains are considered the main challenges when testing composite materials at high strain rates using the split Hopkinson bar technique. The aim of this paper is to assess two types of tensile sample geometries, namely dog-bone and straight strip, in order to study the tensile behaviour of basalt fibre reinforced composites at high strain rates using the split Hopkinson bar technique. 2D Digital image correlation technique was used to study the distribution of the strain fields within the gauge section at quasi-static and dynamic strain rates. Results showed that for the current experiments and the proposed clamping techniques, both sample geometries fulfilled the requirements of a valid split Hopkinson test, and achieved uniform strain fields within the gauge section. However, classical Hopkinson analysis tends to overestimate the actual strains in the gauge section for both geometries. It is, therefore, important to use a local deformation measurement when using these 2 geometries with the proposed clamping technique.
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Sasaki, Yasushi, Manabu Iguchi, and Mitsutaka Hino. "Measuring Strains for Hematite Phase in Sinter Ore by Electron Backscattering Diffraction Method." Key Engineering Materials 326-328 (December 2006): 237–40. http://dx.doi.org/10.4028/www.scientific.net/kem.326-328.237.

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Based on the relationship between quantified blurring degree of Kikuchi bands obtained by an electron backscattering diffraction (EBSD) technique and macroscopic strains measured by a strain gauge, the local compression strain SEBSD in sinter ore has been evaluated under various conditions. There is a good linear relationship between the SEBSD and the strains measured by a strain gauge. The local strain SEBSD evaluated by EBSD patterns can be used as an index of local strains.
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Elmahdy, Ahmed, and Patricia Verleysen. "The Use of 2D and 3D High-Speed Digital Image Correlation in Full Field Strain Measurements of Composite Materials Subjected to High Strain Rates." Proceedings 2, no. 8 (July 9, 2018): 538. http://dx.doi.org/10.3390/icem18-05439.

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The aim of this paper is to assess and compare the performance of both high speed 2D and 3D digital image correlation (DIC) configurations in the characterization of unidirectional carbon fiber reinforced epoxy composites in high strain rate tension in the transverse direction. The criteria for assessment were in terms of strain resolution and measuring the strain localization within the gauge section. Results showed the high-speed 3D DIC technique has lower strain resolution compared to the high-speed 2D DIC technique. In addition, the analysis of the full strain fields indicated that the 3D DIC technique could accurately locate and measure the concentrations of strains within the gauge section of the tested samples.
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Milgrom, Charles, David Burr, David Fyhrie, Mark Forwood, Aharon Finestone, Meir Nyska, Miki Giladi, Meir Liebergall, and Ariel Simkin. "The Effect of Shoe Gear on Human Tibial Strains Recorded During Dynamic Loading: A Pilot Study." Foot & Ankle International 17, no. 11 (November 1996): 667–71. http://dx.doi.org/10.1177/107110079601701104.

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The study was conducted to test the hypothesis that alterations in shoe gear can affect tibial strains in the human during dynamic loading. Rosette strain gauges were mounted on the medial border of the mid-diaphysis in two human subjects with a new strain gauge bonding technique using methyl methacrylate. Strain measurements were made at this site, the most frequent location for stress fractures in the Israeli Army during treadmill walking and free running while wearing various sport shoes (Rockport ProWalkers and New Balance NBX 900) and army boots (light Israeli infantry, double layered sole Israeli infantry, and Zohar infantry boots). Data were analyzed for only one of the subjects because strain gauge bonding was found to be inadequate at the time of surgical removal in the other subject. No single shoe lowered both the principal tibial compression and tensile strains, and the shear strains. The Zohar boot had the lowest principal compression strains during treadmill walking and mobile running, despite its relatively higher weight and sole durometry.
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Sayed, Sahour, Mohammed Gamil, Ahmed M. R. Fath El-Bab, and Ahmed Abd El Moneim Abd Elmoneim. "LASER Reduced Graphene on Flexible Substrate for Strain Sensing Applications: Temperature Effect on Gauge Factor." Key Engineering Materials 644 (May 2015): 115–19. http://dx.doi.org/10.4028/www.scientific.net/kem.644.115.

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New technique is developed to synthesize graphene film on flexible substrate for strain sensing applications. A flexible graphene/Poly-ethylene Terephthalate (PET) strain sensor based on graphene piezoresistivity is produced by a new simple low cost technique. Graphene oxide film on PET substrate is reduced and patterned simultaneously using 2 Watt CO2LASER beam. The synthesized graphene film is characterized by XRD, FT-IR, SEM, and Raman techniques. Commercial strain gauges are used to predict experimentally the gauge factor (GF) of the graphene film at different values of applied strain. The stability of the graphene film and its GF are studied at different operating temperatures. The fabricated sensor showed high GF of 78 with great linearity and stability up to 60 °C.
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Rosenberg, Z., M. Mayseless, and Y. Partom. "Axial Stress-Time History Measurements in Impulsively Loaded Aluminum Rods Using the Double Gauge Technique." Journal of Applied Mechanics 52, no. 4 (December 1, 1985): 977–79. http://dx.doi.org/10.1115/1.3169181.

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The purpose of this Brief Note is to present experimental stress-time histories along the centerline of impulsively loaded aluminum rods. The measurement is based on the double gauge technique in which we use both a manganin stress gauge and a constantan strain gauge at the same location in the rod. The strain gauge record enables one to eliminate the strain contribution to stress gauge resistance change and have a stress-time history. The measured stress history is compared to a calculated one using two-dimensional Lagrangian code and the agreement between them is good.
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Falk, Alexandru, Octavian Pop, Jérôme Dopeux, and Liviu Marsavina. "Assessment of Strains Produced by Thermal Expansion in Printed Circuit Boards." Materials 15, no. 11 (May 31, 2022): 3916. http://dx.doi.org/10.3390/ma15113916.

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The paper proposed an alternative optical metrology to classical methods (strain gauge measurements and numerical simulation) for strain determination on printed circuit board (PCBs) due to thermal loads. The digital image correlation (DIC) technique was employed to record the strain distribution in some particular areas of the PCB. A thermal load was applied using a heating chamber, and the measurements were performed at four different temperature steps (25 °C, 50 °C, 85 °C and 120 °C). An increase in the principal strains with temperature was observed. For validation, the principal strains on the PCB obtained with DIC were compared with the values from gauge strain measurements and numerical simulation. The conclusions highlighted that DIC represents a technique with potential for strain measurement caused by thermal deformation, with the advantages of full field measurement, less preparation of the surface and good accuracy.
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Gill, R. C., J. E. Kellow, C. Browning, and D. L. Wingate. "The use of intraluminal strain gauges for recording ambulant small bowel motility." American Journal of Physiology-Gastrointestinal and Liver Physiology 258, no. 4 (April 1, 1990): G610—G615. http://dx.doi.org/10.1152/ajpgi.1990.258.4.g610.

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Perfused-tube manometry has hitherto been the standard technique for recording intraluminal intestinal pressure in humans, but it is unsuitable for ambulant use. The aim of our study was to evaluate the ability of resistive strain gauge transducers attached to a fine catheter to detect pressure change. Simultaneous strain gauge and perfused-tube manometry was performed on six fasting subjects; in four, strain gauge activation was continuous and in two, the transducers were activated in a pulsed mode with data encoded as a pulse train with an approximate frequency of 20 Hz. Eight thousand eight hundred eighty-eight pressure waves were recorded by strain gauge, of which 96% were detected by perfused-tube manometry. There was good agreement in both phases II and III of the migrating motor complex. The amplitude of pressure waves recorded by strain gauge was slightly but significantly greater. A proportion (14-17%) of pressure waves recorded by strain gauge were bifid; this was not seen with the perfused tube. These differences are best explained by the greater sensitivity and more rapid rise time of the strain gauges. There was no loss of fidelity in the pulse-interval recording mode. A seventh subject underwent a continuous 72-h recording with the strain gauge catheter attached to a battery-operated encoder and magnetic tape cassette recorder and was freely ambulant during this period. The procedure was well tolerated and motility patterns could be clearly identified. We conclude that intraluminal strain gauge catheters are suitable for prolonged use in ambulant subjects and produce data that are closely comparable to the data acquired from perfused-tube manometry under laboratory conditions.
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Dissertations / Theses on the topic "Strain gauge technique"

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Polach, Pavel. "Tréningový systém pro sportovní lezce." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-220335.

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The purpose of this diploma thesis was design and realisation of measuring system, enabling measuring forces between climber´s feet and holds on the climbing wall and using this measu-red values during a training of sport climber. In this thesis there are discovered possibilities about constructing this system and determina-ted basic requirements of measuring. There are also stated principles of application the strain gauges for measuring the tension. Descriptions of developping specific sensors, hardware interface and PC application are also part of this thesis. Constructed system was used for mea-suring climbers and values were analysed by using the application.
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Basso, João Carlos Roballo. "Medição de tensões residuais em poliestireno pelo método do furo cego." Universidade do Estado de Santa Catarina, 2011. http://tede.udesc.br/handle/handle/1602.

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Made available in DSpace on 2016-12-08T17:19:14Z (GMT). No. of bitstreams: 1 Introducao.pdf: 448655 bytes, checksum: 598f8294a6f16ff80e9151c41d1a27f9 (MD5) Previous issue date: 2011-12-15
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Residual stresses in polymeric parts are a great source of uncertainties for the design of industrial components. They are originated mainly during the injection molding process. Some of the problems related to this phenomenon are reduction to the mechanic strength, cracks propagation and warpage. Many efforts are employed to minimize these residual stresses and, to achieve that, an essential step is its measuring. There are methods and devices already available to measure residual stress in metallic materials, but in the field of polymeric material, many aspects remain unexplored. In the present work, a device to measure strain gage signals was built, which was employed to determine residual stresses according to the most established techniques nowadays. Injection simulation techniques were utilized to estimate the build-up of residual stresses in polymeric test specimens under different manufacturing setups. Statistical analysis was performed to select the most favorable parameters for parts tensioning. Test specimens were fabricated in the selected process conditions. Samples weight measurements confirmed statistically that the process parameters selected have significantly altered the parts final mass. Residual stress measurements were carried out by employing the hole drilling technique in the manufactured specimens, thus being determined tensile residual stresses from 2.7 MPa by 6.2 MPa, in the layers closest to the parts surface. The typical profile for residual stress distribution, as described in literature, was observed in the experiments performed.
Tensões residuais em peças poliméricas são grande fonte de incertezas para o projeto de componentes industriais. São causadas principalmente durante o processo de injeção. Alguns dos problemas relacionados a esse fenômeno são a diminuição da resistência mecânica, surgimento de trincas e empenamento das peças. Muitos esforços são empregados na minimização dessas tensões residuais e, para isso, uma etapa indispensável é a sua medição. Existem métodos e equipamentos já disponíveis para medição de tensões residuais em materiais metálicos, porém, no campo dos materiais poliméricos ainda há muitos aspectos a serem melhor explorados. Neste trabalho foi construído um dispositivo para medição de sinais de extensiometria, o qual foi utilizado para determinação de tensões residuais segundo as técnicas mais utilizadas atualmente para metais. Técnicas de simulação de injeção foram utilizadas para estimar o surgimento de tensões residuais em corpos-de-prova poliméricos sob diversas condições de fabricação. Análise estatística foi realizada para selecionar as condições de fabricação mais propícias ao tensionamento das peças. Corpos-de-prova foram fabricados nas condições de processo selecionadas. Medições de peso das amostras confirmaram estatisticamente que os parâmetros de processo utilizados alteraram significativamente a massa final das peças. Medições de tensões residuais foram realizadas aplicando-se a técnica do furo cego nas amostras fabricadas, determinando-se tensões residuais de tração entre 2,7 MPa e 6,2 MPa, nas camadas próximas às superfície das amostras. O perfil típico de tensões residuais previsto em literatura foi observado nos experimentos realizados.
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Su, Chia-Hsien, and 蘇家賢. "Study of Directly Strain Gauge Using Aerosol Jet Printing Technique." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/m2ycjw.

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碩士
國立臺北科技大學
電機工程系
106
Fabrication and characterization of a highly sensitive strain gauge with novel additive manufacturing method is achieved. The conducting silver nanoparticles are directly deposited on the flexible PET substrate by using aerosol jet printing technology to form serpentine patterns for surface deformation sensing. To improve the printing process, we focused on the pneumatic atomization method to generate the aerosol of silver inks for the following experiment. In this thesis, the influences of atomizer flow, exhaust flow, sheath flow, platen heat and process speed are thoroughly tested and studied. Its gauge factor is about 6.09, which also has excellent linearity and repeatability. We also designed and set up the calibration system for our printed strain gauge, including packaging process, the signal amplification circuit, and the LabVIEW program. In this system, we record the transient resistance of the printed strain gauge responded to device deformation. Through simple calculation, the corresponding substrate stretch and gauge performance can be derived.
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Regier, RYAN. "APPLICATION OF FIBRE OPTICS ON REINFORCED CONCRETE STRUCTURES TO DEVELOP A STRUCTURAL HEALTH MONITORING TECHNIQUE." Thesis, 2013. http://hdl.handle.net/1974/8181.

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To better manage deteriorating infrastructure, quantitative data about the performance of infrastructure assets is required. Rayleigh based distributed fibre optic strain sensing (FOS) is a technology that has the potential to offer this type of data and unlike traditional strain sensors it can measure the strain along the full length of the structure. A series of experiments were undertaken to develop installation techniques and evaluate sensor accuracy for typical civil engineering materials: steel, concrete and reinforced concrete. The results of these experiments showed that the choice of sensing fibre and adhesive was dependent on the material being monitored. When the sensing fibre and adhesive are chosen correctly, the Rayleigh system can provide the same accuracy as a strain gauge for steel and concrete, and useful measurements can be obtained even in areas of concrete cracking. The FOS technique was utilized to determine whether distributed strain measurements could be used to detect and quantify localized deterioration of the steel reinforcement (localized area reductions of 0-30%) at service loads. A series of specimens was tested, the sensing system was able to detect the presence of localized deterioration with embedded nylon and polyimide fibres, but the nylon fibre cannot quantify large strain gradients due to slip within the sensing fibre. The strain profiles gave insights to the failure mechanism occurring in the reinforced concrete specimens. The strain profiles for both test series indicated that the tension reinforcement was acting as a tension tie and the strain profiles suggested the presence of compressive struts indicative of an arching mechanism in the specimens. The Black River bridge in Madoc, Ontario was instrumented with fibre optics sensors to determine whether the use of FOS is both practical and beneficial for reinforced concrete bridge assessment when compared to conventional instrumentation. The FOS showed reasonably good agreement with conventional sensors. The fibre optic strain results are used to calculate curvature, slope and displacement but careful consideration of the boundary conditions is required. The results from the fibre optic sensors can be used to show the bridge load distribution and give insights into the support conditions of the beams.
Thesis (Master, Civil Engineering) -- Queen's University, 2013-08-21 11:56:53.276
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Books on the topic "Strain gauge technique"

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Richards, W. Lance. A new correction technique for strain-gage measurements acquired in transient-temperature environments. Edwards, Calif: NASA Dryden Flight Research Center, 1996.

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Boudreau, Joseph F., and Eric S. Swanson. Quantum field theory. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198708636.003.0024.

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Markov chain Monte Carlo techniques are developed to compute properties of a variety of quantum field theories. The method is introduced with a simple scalar field theory and used to evaluate the particle spectrum and phase diagram for parity symmetry breaking. The technique of micorcanonical updating is introduced to increase efficiency. The important topic of gauge theory is then introduced via the gauged Z2 model. Development of the gauge theory formalism continues with Abelian gauge theory in two dimensions. The interaction between static charges is computed and compared to the exact result. The string tension in nonableian SU(2) gauge theory is explored with the aid of the renormalization group, which gives an entrée to a discussion of the Higgs mechanism. Finally, the formalism for including fermions is briefly reviewed.
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Dorey, Patrick, Gregory Korchemsky, Nikita Nekrasov, Volker Schomerus, Didina Serban, and Leticia Cugliandolo, eds. Integrability: From Statistical Systems to Gauge Theory. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780198828150.001.0001.

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This volume contains lectures delivered at the Les Houches Summer School ‘Integrability: from statistical systems to gauge theory’ held in June 2016. The School was focussed on applications of integrability to supersymmetric gauge and string theory, a subject of high and increasing interest in the mathematical and theoretical physics communities over the past decade. Relevant background material was also covered, with lecture series introducing the main concepts and techniques relevant to modern approaches to integrability, conformal field theory, scattering amplitudes, and gauge/string duality. The book will be useful not only to those working directly on integrablility in string and guage theories, but also to researchers in related areas of condensed matter physics and statistical mechanics.
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C, Thompson Randolph, and Dryden Flight Research Facility, eds. Single-strain-gage force/stiffness buckling prediction techniques on a hat-stiffened panel. Edwards, Calif: NASA Ames Research Center, Dryden Flight Research Facility, 1991.

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C, Thompson Randolph, and Dryden Flight Research Facility, eds. Single-strain-gage force/stiffness buckling prediction techniques on a hat-stiffened panel. Edwards, Calif: NASA Ames Research Center, Dryden Flight Research Facility, 1991.

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Single-strain-gage force/stiffness buckling prediction techniques on a hat-stiffened panel. Edwards, Calif: NASA Ames Research Center, Dryden Flight Research Facility, 1991.

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Cryogenic strain gage techniques used in force balance design for the National Transonic Facility. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1986.

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Cryogenic strain gage techniques used in force balance design for the National Transonic Facility. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1986.

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Center, Langley Research, ed. Cryogenic strain gage techniques used in force balance design for the National Transonic Facility. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1986.

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Gage, Greg, and Tim Marzullo. How Your Brain Works. The MIT Press, 2022. http://dx.doi.org/10.7551/mitpress/12429.001.0001.

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Discover the hidden electrical world inside your nervous system using DIY, hands-on experiments, for all ages. No MD or PhD required! The workings of the brain are mysterious: What are neural signals? What do they mean? How do our senses really sense? How does our brain control our movements? What happens when we meditate? Techniques to record signals from living brains were once thought to be the realm of advanced university labs... but not anymore! This book allows anyone to participate in the discovery of neuroscience through hands-on experiments that record the hidden electrical world beneath our skin and skulls. In How Your Brain Works, neuroscientists Greg Gage and Tim Marzullo offer a practical guide—accessible and useful to readers from middle schoolers to college undergraduates to curious adults—for learning about the brain through hands-on experiments. Armed with some DIY electrodes, readers will get to see what brain activity really looks like through simple neuroscience experiments. Written by two neuroscience researchers who invented open-source techniques to record signals from neurons, muscles, hearts, eyes, and brains, How Your Brain Works includes more than forty-five experiments to gain a deeper understanding of your brain. Using a homemade scientific instrument called a SpikerBox, readers can see how fast neural signals travel by recording electrical signals from an earthworm. Or, turning themselves into subjects, readers can strap on some electrode stickers to detect the nervous system in their own bodies. Each chapter begins by describing some phenomenology of a particular area of neuroscience, then guides readers step-by-step through an experiment, and concludes with a series of open-ended questions to inspire further investigation. Some experiments use invertebrates (such as insects), and the book provides a thoughtful framework for the ethical use of these animals in education. How Your Brain Works offers fascinating reading for students at any level, curious readers, and scientists interested in using electrophysiology in their research or teaching. Example Experiments How fast do signals travel down a neuron? The brain uses electricity. . . but do neurons communicate as fast as lightning inside our bodies? In this experiment you will make a speed trap for spikes! Can we really enhance our memories during sleep? Strap on a brainwave-reading sweatband and test the power of cueing up and strengthening memories while you dream away! Wait, that's my number! Ever feel that moment of excitement when you see your number displayed while waiting for an opening at the counter? In this experiment, you will peer into your brainwaves to see what happens when the unexpected occurs and how the brain gets your attention. Using hip hop to talk to the brain. Tired of simply “reading” the electricity from the brain? Would you like to “write” to the nervous system as well? In this experiment you will use a smartphone and hack a headphone cable to see how brain stimulators (used in treating Parkinson's disease) really work. How long does it take the brain to decide? Using simple classroom rulers and a clever technique, readers can determine how long it takes the brain to make decisions.
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Book chapters on the topic "Strain gauge technique"

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Schajer, Gary S., and Philip S. Whitehead. "Strain Gauge Technique: Method Description." In Hole-Drilling Method for Measuring Residual Stresses, 69–86. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-031-79713-2_4.

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Hillery, M. T., and V. J. McCabe. "A Photo-Elastic and Strain Gauge Technique of Stress Analysis in Rod-Drawing." In Proceedings of the Thirtieth International MATADOR Conference, 485–91. London: Macmillan Education UK, 1993. http://dx.doi.org/10.1007/978-1-349-13255-3_62.

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Gińko, Oskar, Andrzej Juś, and Roman Szewczyk. "Test Stand for Measuring Magnetostriction Phenomena Under External Mechanical Stress with Foil Strain Gauges." In Challenges in Automation, Robotics and Measurement Techniques, 843–53. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-29357-8_75.

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Gavrilenkov, Sergey I., and Sergey S. Gavriushin. "Method of Multi-objective Design of Strain Gauge Force Sensors Based on Surrogate Modeling Techniques." In Advances in Intelligent Systems, Computer Science and Digital Economics II, 126–37. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-80478-7_14.

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Merson, Jacob S., Michael B. Prime, Manuel L. Lovato, and Cheng Liu. "In-Situ DIC and Strain Gauges to Isolate the Deficiencies in a Model for Indentation Including Anisotropic Plasticity." In Residual Stress, Thermomechanics & Infrared Imaging, Hybrid Techniques and Inverse Problems, Volume 9, 183–97. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-21765-9_24.

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P. S., Balaji, Karthik Selva Kumar Karuppasamy, Bhargav K. V. J., and Srajan Dalela. "Performance of Strain Gauge in Strain Measurement and Brittle Coating Technique." In Applications and Techniques for Experimental Stress Analysis, 78–90. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-7998-1690-4.ch005.

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The strain gauge system consists of a metallic foil supported in a carrier and bonded to the specimen by a suitable adhesive. Previous chapters discussed the construction, configuration, and the material of the strain gauge. The strain gauge has advantages over the other methods. A strain gauge can give directly the strain value as output. However, in optical methods, it is required to interpret the results. It is also required to be aware that the strain gauge technology is majorly used, and it can also be easily wrongly used. Hence, it is required to obtain the proper knowledge of the strain gauge to get the full benefit of the technology. This chapter covers the majorly on the performance of the strain gauge, its temperature effects, and strain selection. Further, this chapter also covers the brittle coating technique that is used to decide the position of the strain gauge in the applications.
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Kamal, Abhishek, Vinayak Kulkarni, and Niranjan Sahoo. "Measurement of Strain Using Strain Gauge and Piezoelectric Sensors." In Applications and Techniques for Experimental Stress Analysis, 91–101. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-7998-1690-4.ch006.

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Today, measurement of strain plays a crucial role in different areas of research such as manufacturing, aerospace, automotive industry, agriculture, and medical. Many researchers have used different types of strain transducers to measure strain in their relevant research fields. Strain can be measured using mainly two methods (i.e., electrical strain sensors and optical strain sensors). Electrical strain sensors consist basically of strain gauges, piezo film, etc. In electrical strain sensors, the strain gauge is one of the oldest and reliable strain sensors which are available in different types (i.e., wire strain gauge, foil strain gauge, and semiconductor strain gauge). Piezofilm is also playing an important role in the field of strain measurement due to easy availability and less cost.
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P. S., Balaji, and Karthik Selva Kumar Karuppasamy. "Introduction and Application of Strain Gauges." In Applications and Techniques for Experimental Stress Analysis, 57–77. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-7998-1690-4.ch004.

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Strain gauge method is one of the essential and fundamental methods in experimental stress techniques that uses the resistance of the material to determine the stress at a point. The strain gauges can be used in a different combination called Rosette to obtain stress in various directions. This chapter intends to cover types of strain gauges, materials, and Rosette arrangements to provide the reader with an overview of the techniques. The chapter will discuss the basic physics behind the resistance measurement and take the reader into insights on how the developments were made to the application of strain gauges as experimental techniques.
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Lapkova, Dora, Zuzana Kominkova Oplatkova, Michal Pluhacek, Roman Senkerik, and Milan Adamek. "Analysis and Classification Tools for Automatic Process of Punches and Kicks Recognition." In Advances in Computational Intelligence and Robotics, 127–51. IGI Global, 2017. http://dx.doi.org/10.4018/978-1-5225-0565-5.ch006.

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This chapter deals with the pattern recognition in the time series. The data was obtained from the measurement of the force profiles via strain gauge sensor. This pattern recognition should help to classify different techniques of the professional defence (direct punch, direct and round kicks) and gender of the attacker. The aim is to find a suitable feature sets from the measured raw data which has to be transferred in appropriate way; in the case of this research spectral analysis or discrete cosine transformation were used. Based on the previous experience of authors, artificial neural networks with Levenberg-Marquardt training algorithm were selected as a classifier. In these experimentations, students from the Faculty of Applied Informatics, Tomas Bata University in Zlin participated. The results were successful and higher level than expected accuracy of 85% was achieved. The future plans include involving more participants and repeating the simulations to confirm the proposed technique.
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Sierra-Pérez, Julián, and Joham Alvarez-Montoya. "Strain Field Pattern Recognition for Structural Health Monitoring Applications." In Pattern Recognition Applications in Engineering, 1–40. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-7998-1839-7.ch001.

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Strain field pattern recognition, also known as strain mapping, is a structural health monitoring approach based on strain measurements gathered through a network of sensors (i.e., strain gauges and fiber optic sensors such as FGBs or distributed sensing), data-driven modeling for feature extraction (i.e., PCA, nonlinear PCA, ANNs, etc.), and damage indices and thresholds for decision making (i.e., Q index, T2 scores, and so on). The aim is to study the correlations among strain readouts by means of machine learning techniques rooted in the artificial intelligence field in order to infer some change in the global behavior associated with a damage occurrence. Several case studies of real-world engineering structures both made of metallic and composite materials are presented including a wind turbine blade, a lattice spacecraft structure, a UAV wing section, a UAV aircraft under real flight operation, a concrete structure, and a soil profile prototype.
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Conference papers on the topic "Strain gauge technique"

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Szwedowicz, J., S. M. Senn, and R. S. Abhari. "Optimum Strain Gauge Application to Bladed Assemblies." In ASME Turbo Expo 2002: Power for Land, Sea, and Air. ASMEDC, 2002. http://dx.doi.org/10.1115/gt2002-30306.

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Optimum placements of the strain gauges assure reliable vibration measurements of structural components such as rotating blades. Within the framework of cyclic vibration theory, a novel approach has been developed for computation of the optimum gauge positions on tuned bladed discs regarding the determined sensitivity, orthogonality, gradient and distance criteria. The utilized genetic algorithm optimization tool allows for an effective numerical search of suitable solutions of the defined optimization function. A rotating impeller disc represented by a cyclic finite element model demonstrates the application of this method. The present technique can be easily applied to other structural components requiring optimal strain gauge instrumentation.
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Li, Jinggao, Jon P. Longtin, Szymon Tankiewicz, Andrew Gouldstone, and Sanjay Sampath. "Characterization of Interdigital Capacitive Strain Gauges by Direct Write Technology." In ASME 2005 Summer Heat Transfer Conference collocated with the ASME 2005 Pacific Rim Technical Conference and Exhibition on Integration and Packaging of MEMS, NEMS, and Electronic Systems. ASMEDC, 2005. http://dx.doi.org/10.1115/ht2005-72769.

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Interdigitated capacitive strain gauges have several distinct advantages over resistive-based strain gauges, particularly for applications in harsh environments, such as high-temperature environments. In this work capacitive strain gauges have been fabricated using thermal spray technology. Gauges are fabricated using both a direct-write approach where the gauge is fabricated using a computer-controlled deposition system and by ultrafast laser micromachining in which blanket coatings sprayed onto a substrate are subsequently laser micrornachined. Silver coatings were sprayed onto plastic, polymer, composites, fiberglass and alumina to form the strain gauges. An ultrafast laser machining technique was used to fabricate capacitive strain gauges on copper coated printed circuit boards as well as NiCr coatings on alumina substrate. The typical capacitance of strain gauge was in the range of 5∼25 pF. Mechanical tests included gauge factor, linearity and zero shift. Temperature-based measurements include the temperature coefficient of capacitance (TCC) measurements and thermal cycling tests. The devices show promise for use in wireless strain monitoring applications.
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Yoon, Hwan-Sik, and Sanket K. Khedkar. "A Wireless Strain Sensor Using Frequency Modulation Technique." In ASME 2009 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. ASMEDC, 2009. http://dx.doi.org/10.1115/smasis2009-1429.

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A compact wireless strain sensor using a Frequency Modulation (FM) technique is proposed. The sensor employs a conventional resistive strain gauge such that the resistance changes as the measured structure is mechanically strained. When the strain gauge is connected to a frequency modulation circuit, the change in the resistance appears as a frequency shift in the output signal that is transmitted wirelessly to a remote station. The received signal is then demodulated and the buried strain measurement data can be retrieved. Using this technique, a dynamic strain measurement is possible without any wire connection between the sensing point and the measurement equipment. This type of sensors have numerous applications in the strain or vibration measurement of moving or rotating structures such as fans on a turbine engine. The proposed concept of the wireless strain sensor is experimentally demonstrated by measuring vibration of a cantilevered beam with a wired transmission of the measurement data from the transmitter to the receiver.
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Salisbury, D. A. "Assessment and Application of a PVDF Gauge Strain Compensation Technique." In SHOCK COMPRESSION OF CONDENSED MATTER - 2003: Proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter. AIP, 2004. http://dx.doi.org/10.1063/1.1780438.

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de Lemos, Juliano, Horst K. Mischo, and Tilo Pfeifer. "Comparison of strain/stress measurements on free form surfaces using ESPI and strain gauge technique." In Laser Metrology for Precision Management and Inspection in Industry, edited by Armando Albertazzi, Jr. SPIE, 2001. http://dx.doi.org/10.1117/12.439202.

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Narayanan, Aditya, Andy Morris, Catrin M. Davies, and John P. Dear. "Optical Strain Monitoring Techniques." In ASME 2012 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/pvp2012-78515.

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The Auto-Reference Creep Management and Control (ARCMAC) system is being developed as a technique to evaluate the remaining life of power plant components. The system consists of a pair of Inconel plates with a configuration of silicon nitride (SiN) spheres on them, and a camera system used to take images of the gauge during the component’s deformation. The purpose of the system is to measure the creep strain accumulated by a component at regular intervals, tracking the relative motion of the spheres in order to measure a point-to-point value of strain. The system is currently used to capture images of gauges already installed on power plants in the UK as part of scheduled maintenance during plant outages. It is also possible to use the ARCMAC system to capture speckle paint pattern data used in digital image correlation (DIC) in order to visualise the strain field across the heat affected zones (HAZ) in welds and around other strain concentration features. A newer version of the system: the Digital Single Lens Reflex (DSLR) ARCMAC is being developed specifically to capture this kind of data in order to complement the point-to-point strain measurements obtained. This article presents results of experiments performed at room temperature with the purpose of establishing the basic accuracy of the conventional ARCMAC and the DSLR ARCMAC in order to compare their performance. It also intends to evaluate the performance of the latter when used for digital image correlation. The results showcase the accuracy of the technique at high strains using the DSLR camera, showing its usefulness as a tool to measure creep strain.
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Corcoran, Joseph, Catrin Davies, Peter Nagy, and Peter Cawley. "Potential Drop Strain Sensor for Creep Monitoring." In ASME 2014 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/pvp2014-28668.

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Creep is a high temperature damage mechanism of interest to the power industry and at present lacks a satisfactory monitoring technique. Existing material inspection techniques are extremely laborious while strain measurements rely on often infrequent off-load measurements. A quasi-DC directional potential drop technique is presented that is shown at both room temperature and at high temperature to act as a robust strain gauge. Resistivity changes that are expected to occur in high temperature environments are also discussed as a source of potential error in strain measurements.
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Megahed, S. M., and A. A. Nada. "Dynamic Modeling of a Flexible Cantilever Beam: An Experimental Technique." In ASME 2003 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/detc2003/vib-48352.

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This paper describes an investigation of real time dynamic modeling method for a flexible cantilever beam, as an approximation of a robot flexible link, using experimental measurement techniques. The beam is equipped with a number of strain gauges to measure the corresponding nodal flexibilities and using them to obtain its real-time dynamic model. Two methods are proposed; the 1st method is based on approximating the beam deflection by a 4th order polynomial curve while the 2nd one is based on the solution of its Eulerbernoulli equation. The polynomial constants are obtained by real-time estimation using the readings of the strain gauges. These readings are used to estimate the beam temporal solution in the 2nd method. The error in the beam tip deflection is reduced to 0.01% by relocating the last strain gauge at 12.5% instead of 30% from its tip. Both methods show good agreement with the general beam theory and results.
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Yang, Haoliang, Catrin Mair Davies, Paul Hooper, Andy Morris, and John Dear. "A Novel Image Processing Method for ARCMAC Point to Point Optical Strain Measurement." In ASME 2013 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/pvp2013-97209.

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The remaining life of high pressure steam pipes in power stations is heavily dependent upon material creep rates. Monitoring strain in these pipes is difficult due to demanding operational conditions and has resulted in the development of a rugged optical strain gauge system by E.ON UK. The E.ON UK auto-reference creep management and control (ARCMAC) gauge is a point-to-point biaxial creep strain measurement technique. Room temperature validation of the gauge was done using a UK National Physical Laboratory (NPL) extensometer calibration rig (ECR). These gauges have been successfully installed and measurements have been acquired on high temperature (∼600 °C) low-alloy ferritic steel power plant piping. In conjunction with the ARCMAC gauges, research has been ongoing to seek effective methods to process the corresponding ARCMAC images. This paper describes a novel image processing method for the analysis of ARCMAC images. This method processes ARCMAC images with high efficiency and accuracy even if images were taken in demanding environmental conditions. This novel image processing method has been developed into a standalone software program named ARCMAC Assistant to assist both experiment and field work. Experiments involving calibration test work and in-situ creep tests have been used to validate its accuracy.
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Gevinski, Jakerson R., and Robson Pederiva. "Operating Strain Mode Identification Using Acceleration Measurements." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-65306.

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The identification of strain critical regions on machinery and equipment, under operating conditions, can be accomplished by knowing the operating strain modes. Operating strain modes are interpreted as a dynamic strain distribution of the structure at a specific time or frequency. Strain measurements are conventionally obtained by strain gauge techniques. However, strain measurements with conventional strain gauges are not always possible, and the gauges are not reusable and cannot be moved from point to point when they have been attached to structures. In this paper, a post-processing technique based on Operating Deflection Shapes (ODS) is evaluated with an experimental test. Operational strain modes of an aluminum plate were identified from accelerations measured using tri-axial accelerometer. The operating modes were analyzed at frequencies close to the plate’s natural frequency, previously known by numerical simulation, in the frequency range 0–1000 Hz. The plate was excited with random white noise signal. We used the finite element method in the displacement to strain transformation. Operational modes were compared with simulated modes, which were obtained by modal superposition. The comparisons showed consistency between experimentally and numerically identified modes. Regions of greatest strain could be identified graphically in the color map regarding the minimum and maximum strain.
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Reports on the topic "Strain gauge technique"

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Tire Experimental Characterization Using Contactless Measurement Methods. SAE International, August 2021. http://dx.doi.org/10.4271/2021-01-1114.

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In the frame of automotive Noise Vibration and Harshness (NVH) evaluation, inner cabin noise is among the most important indicators. The main noise contributors can be identified in engine, suspensions, tires, powertrain, brake system, etc. With the advent of E-vehicles and the consequent absence of the Internal Combustion Engine (ICE), tire/road noise has gained more importance, particularly at mid-speed driving and in the spectrum up to 300 Hz. At the state of the art, the identification and characterization of Noise and Vibration sources rely on pointwise sensors (microphones, accelerometers, strain gauges). Optical methods such as Digital Image Correlation (DIC) and Laser Doppler Vibrometer (LDV) have recently received special attention in the NVH field because they can be used to obtain full-field measurements. Moreover, these same techniques could also allow to characterize the tire behavior in operating conditions, which would be practically impossible to derive with standard techniques. In this paper we will demonstrate how non-contact full-field measurement techniques can be used to reliably and robustly characterize the tire behavior up to 300 Hz, focusing on static conditions. Experimental modal analysis will extract the modal characteristic of the tire in both free-free and statically preloaded boundary conditions, using both DIC and LDV. The extracted natural frequencies, damping ratios and full-field mode shapes will be used on one side to improve the accuracy of tire models (either by deriving FRF based models or updating FE ones) but also as a reference for future investigation on the tire behavior characterization in rotating conditions.
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