Relevant bibliographies by topics / Strain Gauge analysis

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Strain Gauge analysis'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Strain Gauge analysis"

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Korshunov, V., R. Mudrik, D. Ponomarev, and A. Rodionov. "Approaches to refinement of analytical models for stress-strain state assessments of structures based on the analysis of monitoring system data." Transactions of the Krylov State Research Centre 1, no. 395 (March 9, 2021): 47–54. http://dx.doi.org/10.24937/2542-2324-2021-1-395-47-54.

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Object and purpose of research. This paper discusses numerical simulation possibilities in terms of stress-strain monitoring for marine engineering structures. This approach can simulate the behavior of strain gauges for both elastic and plastic material behavior. Materials and methods. FEM-based simulation of strain gauge operation process taking into account geometric and physical non-linearity. Main results. Development of refined FE models for sensor installation area of stress-strain monitoring system. Numerical simulation of uniaxial and triaxial strain gauge operation. Time histories of strain gauge readings for linear and non-linear behavior of material. Sensitivity analysis of strain gauges in terms of various strain types. Update of strain gauge arrangement for the best description of structural strains. Conclusion. These results demonstrate and confirm a strong potential of numerical models in development of stress-strain monitoring systems for engineering structures. Simulating strain gauge operation, these models make it possible to determine global strained state of given structure as per strain gauging data for some of its areas.
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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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Edwardson, S. P., K. G. Watkins, G. Dearden, P. French, and J. Magee. "Strain gauge analysis of laser forming." Journal of Laser Applications 15, no. 4 (November 2003): 225–32. http://dx.doi.org/10.2351/1.1620000.

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Vadivuchezhian, K., K. Subrahmanya, and N. Chockappan. "Finite Element Modeling of Effect of Adhesive Layer and Carrier Thickness Used for Strain Gauge Mounting." Advanced Materials Research 1119 (July 2015): 828–32. http://dx.doi.org/10.4028/www.scientific.net/amr.1119.828.

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Metal foil strain gauges are most widely used for the stress analysis in engineering structures. Typical strain gauge system includes strain sensitive grid, carrier material, and adhesive layer. Strain measurement from the strain gauge is partially affected by carrier and adhesive materials and their thickness. In the present work, a Finite Element Model is developed in order to study the effect of both adhesive layer and carrier thickness on strain measurements while using strain gauges. To understand the behavior of the adhesive material, mechanical characterization is done on bulk adhesive specimen. Finite Element Analysis (FEA) is carried out with different materials namely epoxy and polyurethane. Initially a single element foil loop is considered for the analysis and further this is extended to metal foil strain gauge with nine end-loops. Finally, the strain variation through thickness of adhesive layer, carrier and strain sensitive grid is obtained from FEA. The results thus obtained are compared with analytical results from Basic Strength of Materials approach.
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Cristofolini, L., B. P. McNamara, A. Freddi, and M. Viceconti. "In vitro measured strains in the loaded femur: Quantification of experimental error." Journal of Strain Analysis for Engineering Design 32, no. 3 (April 1, 1997): 193–200. http://dx.doi.org/10.1243/0309324971513337.

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The application of strain gauges to bone surfaces has been extensively employed as a method of determining, strain fields in response to implanted devices in orthopaedics. The aim of this study was to determine some of the experimental errors associated with the use of strain gauges in in vitro experimental investigations of the loaded femur. An experimental protocol was devised to obtain strain data at 20 strain gauged locations on the proximal femur. These data were interpolated using a parametric model. The parametric model was then used to estimate the errors associated with mispositioning of the gauges and deviations in their direction of application to the bone. This sensitivity analysis was also supported by a finite element analysis for the purposes of comparison and cross-validation. The results indicated that the nature of the loading normally employed in the literature can contribute to making the readings for some of the gauges (anterior and posterior) unreliable and redundant, even for small positioning errors. The greatest predicted errors for the lateral and medial gauges were due to misalignment of the gauge as opposed to mispositioning. The size of the gauge had a negligible effect on the errors predicted relative to those caused by misalignment.
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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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Whelan, M. P., P. O'Donnell, and E. G. Little. "Modelling an orthopaedic knee prosthesis as a layered elastic system part 1: Experimental and theoretical analyses." Journal of Strain Analysis for Engineering Design 30, no. 3 (July 1, 1995): 185–93. http://dx.doi.org/10.1243/03093247v303185.

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The purpose of this investigation was to produce a simplified model of the plastic tibial plateau of a typical unicondylar knee prosthesis that would allow the parametric study of contact stresses experienced by the plastic component during relatively severe loading conditions. This involved the design, production and testing of a three-dimensional axisymmetric embedded strain gauge model of the tibial plateau and the application of a suitable theoretical analysis. The principal feature of the strain gauge model was the possibility of varying the thickness during the experimental procedure while keeping the maximum number of embedded gauges active. The Hertzian contact theory was used as a basis for the prediction of integration errors associated with placing strain gauges in locations subject to large strain gradients. A theoretical analysis that took the layered nature of the contact model into account was carried out which provided full field data for comparison with Hertzian and experimental results. Good agreement was obtained between theoretical and experimental values along the model axis, while at off-axis locations theoretical results based on the layered analysis compared reasonably with embedded strain gauge data. Very slight discrepancies between the experimental and idealized boundary conditions present in the initial stages of testing resulted in significant differences between embedded strain gauge and theoretical data.
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Kim, D. G., J. B. Brunski, and D. P. Nicolella. "Microstrain fields for cortical bone in uniaxial tension: Optical analysis method." Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine 219, no. 2 (February 1, 2005): 119–28. http://dx.doi.org/10.1243/095441105x9291.

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This study employed an optical strain measurement method, called microdisplacements by machine vision photogrammetry (DISMAP), to measure both the global and local strain fields in microtensile specimens of cortical bone subjected to controlled uniaxial tension. The variation of local maximum principal strains was measured within the gauge region of samples as a function of applied tensile stress during testing. High gradients of local strain appeared around microstructural features in stressed bone even while the global strain for the entire gauge region showed a strong linear correlation with increasing tensile stress (r2 = 0.98, p < 0.0001). The highest local strain around micro-structural features in bone was 11.5-79.5 times higher than the global strain.
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Gao, Jiazi, Bei Liu, Min Zhang, He Gong, and Bingzhao Gao. "Strain Distribution Evaluation of Rat Tibia under Axial Compressive Load by Combining Strain Gauge Measurement and Finite Element Analysis." Applied Bionics and Biomechanics 2019 (December 1, 2019): 1–14. http://dx.doi.org/10.1155/2019/1736763.

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This study is aimed at providing an effective method for determining strain-load relationship and at quantifying the strain distribution within the whole tibia under axial compressive load on rats. Rat tibial models with axial compressive load were designed. Strains in three directions (0°, 45°, and 90°) at the proximal shaft of the tibia were measured by using a strain gauge rosette, which was used to calculate the maximum and minimum principal strains. Moreover, the strain at the midshaft of the tibia was measured by a single-element strain gauge. The slopes of the strain-load curves with different peak loads were calculated to assess the stability of the strain gauge measurement. Mechanical environment in the whole tibia by the axial compressive load was quantified using finite element analysis (FEA) based on microcomputed tomography images. The von Mises elastic strain distributions of the whole tibiae were evaluated. Slopes of the strain-load curves showed no significant differences among different peak loads (ANOVA; P>0.05), indicating that the strain-load relationship obtained from the strain gauge measurement was reasonable and stable. The FEA results corresponded to the experimental results with an error smaller than 15% (paired Student’s t-test, P>0.05), signifying that the FEA can simulate the experiment reasonably. FEA results showed that the von Mises elastic strain was the lowest in the middle and gradually increased to both sides along the lateral direction, with the maximal von Mises elastic strain being observed on the posterior side under the distal tibiofibular synostosis. The method of strain gauge measurements and FEA used in this study can provide a feasible way to obtain the mechanical environment of the tibiae under axial compressive load on the rats and serve as a reference for further exploring the mechanical response of the bone by axial compressive load.
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Raianov, Timur A. "Mathematical modeling of a strain gauge measurement system in MATLAB SIMULINK program." Transportation Systems and Technology 6, no. 2 (June 30, 2020): 85–93. http://dx.doi.org/10.17816/transsyst20206285-93.

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Background: In recent years, modern strain gauge systems for measuring, which are used in automobile, railway, aviation, and ship transport, as well as in the pulp, paper, and metallurgical industries, have become extremely popular. These metrological systems provide accurate measurement in difficult operating conditions. The most popular among sensors are strain gauges, they are increasingly used in various areas of marine operations and legal proceedings. They are the optimal solution in the field of torque measurement. Aim: The program creates a model of a strain gauge measurement system. Analysis of power output characteristics. Methods: The article describes the construction of a mathematical model of the strain gauge measurement system. The MATLAB SIMULINK library was used for simulation. The work is based on mathematical modeling and is aimed at creating a computer-based strain gauge model. The output characteristics are analyzed. The accuracy of the software model measurement was verified by checking the convergence of the actual and measured values. Results: A software model of the strain gauge force measurement system was created to create a real computer strain gauge measurement system. Output characteristics are obtained. Conclusions: A software model of the strain gauge measurement system is proposed; The output characteristics were studied and the measurement accuracy was checked.
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Dissertations / Theses on the topic "Strain Gauge analysis"

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Baadkar, Chetan Chandrakant. "Semi-Trailer Structural Failure Analysis Using Finite Element Method." Thesis, University of Canterbury. Mechanical Engineering, 2010. http://hdl.handle.net/10092/5240.

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This project is centred on an ongoing trailer component failure problem at the STEELBRO New Zealand Ltd due to cracks. In this research the problem has been systematically approached using ANSYS finite element analysis software. The approach involves investigation of the problem and structural analysis of the trailer subjected to two types of service conditions. The service conditions are simulated in ANSYS which involved CAD and finite element modelling of the trailer, and then the finite element model is validated experimentally by strain gauges and geometrically by ANSYS element shape checking capability. The finite element model subjected to static structural analysis confirmed the crack locations and indicated the cause of the failure. Further fatigue analysis on one of the loading condition revealed it’s potential to cause failure at the crack locations. Finally, this research concludes with a proposal of revised component design to overcome the failure at the crack locations and recommendations for further analysis on the trailer.
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Kojima, Alberto Noriyuki. "Extensometria : avaliação de implantes de sextavado externo posicionados na configuração linear e compensada (offset), sob carregamento axial /." São José dos Campos : [s.n.], 2008. http://hdl.handle.net/11449/105530.

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Orientador: Renato Sussumu Nishioka
Banca: Wirley Gonçalves Assunção
Banca: Alysson Noriyuki Kajishima Konno
Banca: Eduardo Shigueyuki Uemura
Banca: Osvaldo Daniel Andreatta Filho
Resumo: O objetivo deste estudo foi avaliar, por meio da extensometria, a distribuição de tensões ao redor de implantes em função dos diferentes locais para carregamento, tipo de coifa (plástica ou usinada) e configuração (linear e compensada). Para tanto, em um bloco de poliuretano, foram posicionados paralelos entre si e com uma configuração linear, implantes auto-rosqueáveis de hexágono externo, com dimensões de 3,75 X 13mm, a uma distancia de 7mm, de centro a centro. Em um outro bloco a fixação do meio foi deslocada em 2mm para gerar uma configuração compensada (offset). Pilares protéticos Micro-unit, com 3mm de cinta foram instalados sobre as fixações. Com duas matrizes em aço inoxidável foram confeccionados 10 enceramentos para cada bloco, distribuídos da seguinte forma: 5 para coifa plástica e 5 para coifas usinadas (n=5). A seguir esses padrões foram fundidos com uma liga de Co-Cr. Quatro extensômetros (strain gauges) foram colados na superfície superior de cada bloco tangenciando a plataforma de cada fixação. Um carregamento de 30kg durante 10s foi feito em cinco posições (A, B, C, D, E), sendo repetido três vezes para aquisição dos dados (em με) pela aparelho condicionador de sinais. Os dados obtidos foram submetidos a análise de variância (ANOVA) e teste de Tukey (p<0,05). Como conclusão da análise dos resultados obtidos pudemos observar que não houve diferença na utilização de coifas plásticas e usinadas, que não houve diferença entre as configurações linear e compensada; havendo diferença estatisticamente significante para os locais de carregamento
Abstract: The aim of this study was to evaluate, using strain gauge, the load distribution surround the implants according differents loading sites, coping types (plastic and machined) and configuration (linear and offset). In one polyurethane block, three cylindrical implants with external hexagon (3.75mm x 13mm) were fixed parallel with 7mm between their centers in a linear configuration. In another block the midle implant was positioned in a 2mm offset. Micro-units abutments with 3mm of metallic neck were fixed. With two metallics matrix, it was manufactured 10 wax patterns for each block, distributed in the following form: 5 for plastic copings and 5 for machined copings (n=5). After, patterns were casted in cobalt-chromium alloy. Four strain gauges were positioned on the upper surface of each polyurethane model around the implants. An axial load of 30kg within 10 seconds in five positions (A, B, C, D, E), with three repetead measurements for data aquisition (in με) by the multichanel bridge machine. The datas were submitted to ANOVA and Tukey test (p<0.05). Such as conclusion from the obtained data treatment: there was no difference between the plastic and machined copings, there was no difference between the linear and offset configuration; there was statiscal significance only with the differents loading sites.
Doutor
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Bulkai, Andras. "Advanced finite element analysis for strain measurement in a threaded connection." Thesis, Loughborough University, 2007. https://dspace.lboro.ac.uk/2134/7901.

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There is no established method of measuring load accurately in a threaded connection at working temperatures exceeding 500°C. At these conditions conventional methods can not be used due to the sensitivity of the instruments and it is suggested that a non contact method should be used. The laser strain gauge was developed by the Loughborough University Optical Research Group and it is a non contact way of measuring surface strain. With the help of finite element analysis (FEA) a special nut was developed that can be used to measure the load on the connection by relating the surface strain of the nut to the load. Experimental work later revealed that due to the threads sticking in the connection there is hysteresis present between the load and surface strain relationship. To eliminate the hysteresis a new part was added to the connection which could be used to relate the surface strain on it to the load without any hysteresis. This new part was a specially designed washer with three grooves to allow easy access for the user to measure the surface strain using the laser strain gauge. Part of the design specification was that the load has to be determined to an accuracy of 0.5%. Using sensitivity analysis the washer was analysed in terms of how manufacturing imperfections affect the accuracy of the load measuring device. The results revealed that to achieve the required 0.5% accuracy the washer would have to be manufactured to very tight tolerances. To achieve these tight tolerances the manufacturing process would not be cost effective so it was proposed that individual calibration is required for each load measuring washer. Tests showed that with sufficient calibration the specially designed washer and the laser strain gauge can be combined and used as an accurate non contact load measuring device. As it is a non contact method it can be used in extreme environments including high temperatures. This thesis describes how background research, finite element analysis and experimental testing were used to develop the load measuring washer. Also it is shown, how in-depth sensitivity analysis was used to determine the accuracy of the prototype and that how manufacturing imperfections influence the working life of a threaded connection.
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Kojima, Alberto Noriyuki [UNESP]. "Extensometria: avaliação de implantes de sextavado externo posicionados na configuração linear e compensada (offset), sob carregamento axial." Universidade Estadual Paulista (UNESP), 2008. http://hdl.handle.net/11449/105530.

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Made available in DSpace on 2014-06-11T19:35:02Z (GMT). No. of bitstreams: 0 Previous issue date: 2008-07-07Bitstream added on 2014-06-13T20:25:48Z : No. of bitstreams: 1 kojima_an_dr_sjc.pdf: 500670 bytes, checksum: 06c2a32f2d0fe96b743e1f05b9e95270 (MD5)
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
O objetivo deste estudo foi avaliar, por meio da extensometria, a distribuição de tensões ao redor de implantes em função dos diferentes locais para carregamento, tipo de coifa (plástica ou usinada) e configuração (linear e compensada). Para tanto, em um bloco de poliuretano, foram posicionados paralelos entre si e com uma configuração linear, implantes auto-rosqueáveis de hexágono externo, com dimensões de 3,75 X 13mm, a uma distancia de 7mm, de centro a centro. Em um outro bloco a fixação do meio foi deslocada em 2mm para gerar uma configuração compensada (offset). Pilares protéticos Micro-unit, com 3mm de cinta foram instalados sobre as fixações. Com duas matrizes em aço inoxidável foram confeccionados 10 enceramentos para cada bloco, distribuídos da seguinte forma: 5 para coifa plástica e 5 para coifas usinadas (n=5). A seguir esses padrões foram fundidos com uma liga de Co-Cr. Quatro extensômetros (strain gauges) foram colados na superfície superior de cada bloco tangenciando a plataforma de cada fixação. Um carregamento de 30kg durante 10s foi feito em cinco posições (A, B, C, D, E), sendo repetido três vezes para aquisição dos dados (em με) pela aparelho condicionador de sinais. Os dados obtidos foram submetidos a análise de variância (ANOVA) e teste de Tukey (p<0,05). Como conclusão da análise dos resultados obtidos pudemos observar que não houve diferença na utilização de coifas plásticas e usinadas, que não houve diferença entre as configurações linear e compensada; havendo diferença estatisticamente significante para os locais de carregamento
The aim of this study was to evaluate, using strain gauge, the load distribution surround the implants according differents loading sites, coping types (plastic and machined) and configuration (linear and offset). In one polyurethane block, three cylindrical implants with external hexagon (3.75mm x 13mm) were fixed parallel with 7mm between their centers in a linear configuration. In another block the midle implant was positioned in a 2mm offset. Micro-units abutments with 3mm of metallic neck were fixed. With two metallics matrix, it was manufactured 10 wax patterns for each block, distributed in the following form: 5 for plastic copings and 5 for machined copings (n=5). After, patterns were casted in cobalt-chromium alloy. Four strain gauges were positioned on the upper surface of each polyurethane model around the implants. An axial load of 30kg within 10 seconds in five positions (A, B, C, D, E), with three repetead measurements for data aquisition (in με) by the multichanel bridge machine. The datas were submitted to ANOVA and Tukey test (p<0.05). Such as conclusion from the obtained data treatment: there was no difference between the plastic and machined copings, there was no difference between the linear and offset configuration; there was statiscal significance only with the differents loading sites.
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Beran, Vojtěch. "Využití nalepovacích tenzometru pro stanovení tlaku v potrubí." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-318144.

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This master´s thesis deals with determination of pressure in the pipe using foil strain gauge. It is calculation of the pressure from the measured strain. The main purpose of this work is devise mathematical-technological models to determinate internal pipe pressure from longitudinal deformation. Devised models were used on data from realized experiment and results were compared with real value of pressures in pipes. This thesis contains three models which were mutually compared. Sensitivity analysis were done on two of these models. Thesis also contains opening research of strain gauge problematics. Description of basic knowledge of physical objects mechanic with focusing on shells also belongs to this theoretical part.
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Zimmerman, Cory Tyler. "Performance Analysis and Modeling of Pavements with a Cold Central Plant Recycled Base under Accelerated Loading Testing." Thesis, Virginia Tech, 2017. http://hdl.handle.net/10919/79131.

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Cold Central Plant Recycling (CCPR) has been used by many state highway agencies to save material, money, time, and energy in pavement construction and rehabilitation. The objectives of this thesis were to: (1) perform an instrumented verification analysis, (2) evaluate the response and performance of two pavement configurations with a CCPR base layer through accelerated pavement testing (APT), and (3) construct models using mechanistic-empirical pavement design software for comparison with the APT results. The pavement configurations featured a 5-inch CCPR mixture with either a 3-inch or 1.5-inch SM-9.5D surface 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 analysis showed that the strain gauges and pressure cells used in the experiment recorded pavement responses with a high degree of repeatability. In addition, the loading condition variables (speed, wheel load, and tire inflation pressure) affected the response following the expected trends and did not affect the repeatability of the instruments. The average CV of all strain gauge and pressure cell signals was approximately 0.009 or 0.9%, and 0.004 or 0.4%, respectively. In terms of the rutting comparison, the sections with the 3-inch surface layer outperformed the sections with the thinner 1.5-inch surface layer. However, the age of the pavement at the start of testing significantly affected the rutting performance. After adjusting for the pavement age at the time of testing, the section with the thicker surface showed approximately half of the rutting of the section with the thinner surface. The results from preliminary ME Design analysis indicate that the software cannot model the studied APT sections using the default material properties and calibration factors available at the time of analysis. In particular, the software does not seem to be prepared to model the CCPR materials.
Master of Science
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Carn, Cheril, and cheril Carn@dsto defence gov au. "The inverse determination of aircraft loading using artificial neural network analysis of structural response data with statistical methods." RMIT University. Aerospace, Mechanical and Manufacturing Engineering, 2007. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20080109.090600.

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An artificial Neural Network (ANN) system has been developed that can analyse aircraft flight data to provide a reconstruction of the aerodynamic loads experienced by the aircraft during flight, including manoeuvre, buffet and distributed loading. For this research data was taken from the International Follow-On Structural Test Project (IFOSTP) F/A-18 fatigue test conducted by the Royal Australian Air Force and Canadian Forces. This fatigue test involved the simultaneous application of both manouevre and buffet loads using airbag actuators and shakers. The applied loads were representative of the actual loads experienced by an FA/18 during flight tests. Following an evaluation of different ANN types an Ellman network with three linear layers was selected. The Elman back-propagation network was tested with various parameters and structures. The network was trained using the MATLAB 'traingdx' function with is a gradient descent with momentum and adaptive learning rate back-propagation algorithm. The ANN was able to provide a good approximation of the actual manoeuvre or buffet loads at the location where the training loads data were recorded even for input values which differ from the training input values. In further tests the ability to estimate distributed loading at locations not included in the training data was also demonstrated. The ANN was then modified to incorporate various methods for the calculation and prediction of output error and reliability Used in combination and in appropriate circumstances, the addition of these capabilities significantly increase the reliability, accuracy and therefore usefulness of the ANN system's ability to estimate aircraft loading.To demonstrate the ANN system's usefulness as a fatigue monitoring tool it was combined with a formulae for crack growth analysis. Results inficate the ANN system may be a useful fatigue monitoring tool enabling real time monitoring of aircraft critical components using existing strain gauge sensors.
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Silva, Gisele Rodrigues da. "Resistência à fratura, padrão de fratura e deformação de raízes com canais excessivamente alargados restaurados com diferentes pinos e técnicas - avaliação mecânica e por extensometria." Universidade Federal de Uberlândia, 2007. https://repositorio.ufu.br/handle/123456789/17041.

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Fundação de Amparo a Pesquisa do Estado de Minas Gerais
The widening of the root canal increases its fracture risk and is not clear yet, the influence of the materials and techniques used to restore these teeth. The aim of this study was to evaluate the effect of different posts and restorative techniques in the fracture resistance, fracture mode and root strain in canals excessively widened. One hundred thirty five standardized bovine roots, with similar dimensions and endodontically treated, were randomly divided in 9 groups (n=15) with the root canals prepared with 10 mm depth and 1.5 mm diameter. All roots received ferrule in the coronal ending with 0.5 mm depth and 2 mm extension. The roots of two reference groups were reconstructed with nickel-chromium metallic cast post-and-core (NMF) and glass fiber post (PFV) with composite resin core. For the experimental groups (weakened roots - wc groups), the root canals were over prepared additionally with the depth of 9 mm and the diameter increased to approximately 3,5 mm. Then the roots were restored with metallic cast post-and-core (wcNMF); glass fiber post (wcPFV); glass fiber post associated with accessory glass - ap - fiber post (wcPFVap); direct composite resin - cr - in the medial and cervical thirds after luting the post (wcPFVcr); direct composite resin associated with accessory posts in the medial and cervical thirds, after luting the post (wcPFVcrap); the post was reembased indirectly with composite resin - icr - (wcPFVicr); the post was reembased indirectly with composite resin associated with accessory posts (wcPFVicrap). All posts were fixed with chemical resinous cement, the core was made with composite resin and the roots restored with metallic crown. The samples were submitted to 3x105 mechanical fatigue cycles of 50 N load and fracture resistance measured in a mechanical testing machine with tangential load application (135º). Five samples of each group received two strain gauges adhered in the mesial and buccal surfaces of the root, 1mm below the cervical crown ending, in the center of the tooth, to measure roots strain under continuous 0 to 100 N loading. Fracture mode was classified in accordance to the degree of destruction of the dental structure, in catastrophic or repairable. The data were submitted to ANOVA (2x2)l to one-way and Tukey´s test (α=0.05). The factorial analysis demonstrated significant decrease of the fracture resistance and catastrophic failures for the wcNMF group. Roots widened canals restored with composite resin and/or accessory fiber posts result in fracture resistance values similar to NMF group, however, these demonstrated more repairable fracture. The strain-gauge analysis didn t present significant differences in the superficial strain of the root. Fiber glass post associated with composite resin or with accessory fiber glass posts, seems to be more indicated as alternative to metallic cast post-and-core in weakened roots, because of the lower risk of catastrophic fractures.
O alargamento do canal aumenta o risco de fratura dentária e ainda não está clara a influência dos materiais e técnicas empregados para restaurar dentes com estas características. Assim, o objetivo deste estudo foi avaliar o efeito de diferentes pinos e técnicas restauradoras na resistência à fratura, padrão de fratura e deformação de raízes com canais excessivamente alargados. Foram empregadas 135 raízes bovinas com dimensões semelhantes, tratadas endodonticamente, aleatoriamente divididas em 9 grupos (n= 15). Os canais foram preparados com 10 mm de profundidade e 1,5 mm de diâmetro e as raízes receberam preparo com férula de 0,5 mm de profundidade e 2 mm de extensão. Dois grupos de referência foram restaurados com retentores intraradiculares metálicos fundidos em níquel-cromo (NMF) e pino de fibra de vidro (PFV) com núcleo de preenchimento em resina composta. Para os demais grupos, os canais radiculares foram alargados na profundidade de 9 mm e o diâmetro aumentado para ±3,5 mm, padronizando a espessura de dentina remanescente em 0,5mm no terço coronário da raiz. Os canais alargados (ca) foram então restaurados com, núcleo metálico fundido (caNMF); pino de fibra de vidro (caPFV); pino de fibra de vidro associado a pinos de fibra de vidro acessórios (caPFVpa); preenchimento direto com resina composta nos terços médio e cervical após cimentação do pino (caPFVrd); preenchimento direto com resina composta associado a pinos acessórios, após cimentação do pino (caPFVrdpa); pino reembasado com resina composta de forma indireta (caPFVri); pino reembasado com resina composta de forma indireta associado a pinos acessórios (caPFVripa). Todos os procedimentos de cimentação foram realizados com cimento resinoso de ativação química, os núcleos de preenchimento em resina composta e as raízes restauradas com coroa total metálica. As amostras foram submetidas a 3x105 ciclos de fadiga mecânica de 50N de carga. Em cinco amostras de cada grupo, dois extensômetros foram aderidos à raiz, um na mesial e outro na vestibular, 1 mm abaixo do limite cervical da coroa, no centro do dente, para mensurar a deformação das raízes sob carregamento contínuo de 0 a 100N. A resistência à fratura (N) das amostras foi então medida em máquina de ensaio mecânico com aplicação de carga tangencial (135º). Os dados foram submetidos à análise de variância fatorial (2x2), para comparar o efeito do tipo de retentor em função do tipo de raiz, e em fator único, para avaliar os métodos de preenchimento, seguido pelo teste de Tukey (α=0,05). O padrão de fratura foi classificado de acordo com o grau de comprometimento da estrutura dentária em catastrófica ou reparável. A análise estatística fatorial demonstrou significativa redução da resistência à fratura e falhas catastróficas para o grupo caNMF. Valores de resistência comparável ao grupo NMF e padrão de fratura reparável foram obtidos em raízes com canais alargados, sempre que a resina composta ou pinos de fibra acessórios foram utilizados. Não houve diferença significante na deformação externa da raiz entre os grupos estudados. Pode-se concluir que o uso de pinos de fibra de vidro, associado ao preenchimento com resina composta e/ou pinos de fibra de vidro acessórios, parece ser mais indicado como alternativa ao núcleo metálico fundido em raízes fragilizadas, devido ao menor risco de fraturas catastróficas.
Mestre em Odontologia
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Roscoe, Marina Guimarães. "Influência da perda óssea, tipo de retentor e presença de remanescente coronário no comportamento biomecânico de caninos superiores tratados endodonticamente." Universidade Federal de Uberlândia, 2013. https://repositorio.ufu.br/handle/123456789/16964.

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The presence of bone loss is related to changes in the biomechanical behavior of endodontically treated teeth. The purpose of this study was to evaluate the effect of alveolar bone loss, ferrule presence and post type on the biomechanical behavior of endodontically treated maxillary canines restored with all-ceramic crowns. For the experimental analysis, forty upper human canines were selected and divided into 8 experimental groups according 3 treatment variations: bone support, without or with 5.0 mm of bone loss; ferrule presence, with or without 2.0mm of ferrule; and post type, restored with cast post and cores or glass fiber post. The restored canines were loaded at a 15- degree angle, and the deformation was measured using strain gauges placed on the buccal and proximal root surfaces. Strain results were analyzed by 3- way-ANOVA and Tukey HSD tests (α=.05). For the finite element analysis, eight 3-D models were created, following the same variations of the experimental analysis. The models were analyzed using the maximum principal stress criteria for stress distribution analysis. The presence of ferrule decreased significantly the buccal and proximal strain. The type of post showed slightly influence on the stress distribution. The presence of bone loss increased significantly the stress concentration and strain values in both regions mainly on root dentin and surrounding cortical bone. Can be possible to conclude that the presence of a ferrule improved the mechanical behavior, irrespective of the type of post. The 5.0mm of bone loss increased significantly the stress concentration and the strain on the root dentin.
A perda de inserção óssea está relacionada a mudanças no comportamento biomecânico de dentes tratados endodonticamente. O objetivo deste estudo foi avaliar o efeito da perda óssea alveolar, da presença de remanescente coronário e do tipo de retentor intra-radicular no comportamento biomecânico de caninos tratados endodonticamente e restaurados com cora em cerâmica pura. Para a análise experimental, quarenta caninos superiores foram selecionados e divididos em 8 grupos experimentais (n=10), de acordo com três fatores em estudo: suporte ósseo, ausência e presença de 5.0mm de perda óssea; remanescente coronário, ausência e presença de 2.0mm de remanescente coronário; e tipo de retentor, núcleo moldado e fundido e pino de fibra de vidro. Os caninos foram restaurados com cora em cerâmica pura reforçada por disilicato de lítio. As amostras foram submetidas ao carregamento de compressão a 15º em relação ao longo eixo do dente, e a deformação mensurada por extensômetros fixados nas superfícies radiculares vestibular e proximal. Os valores de deformação foram submetidos a Análise de variância fatorial 2X2X2 seguido pelo teste Tukey HSD (α=0,05). Para a análise de elementos finitos, oito modelos foram criados, simulando as mesmas variáveis da análise experimental. Todas as estruturas foram consideradas homogêneas e isotrópicas, a exceção do pino de fibra de vidro, considerado ortotrópico. Foi utilizado o critério de máxima tensão principal para análise de distribuição de tensões. A presença do remanescente coronário diminuiu significativamente a deformação vestibular e proximal. O tipo de pino mostrou pequena influência na distribuição de tensões. A presença da perda óssea aumentou significativamente a concentração de tensões, principalmente na dentina radicular e no osso cortical, e os valores de deformação em ambas as regiões mensuradas. Pode-se concluir que a presença de remanescente coronário dentinário melhorou o comportamento biomecânico, independente do tipo de pino. A presença da perda óssea alveolar de 5.0mm aumentou significativamente os valores de deformação e a concentração de tensões na dentina radicular.
Mestre em Odontologia
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Civín, Adam. "Komplexní teoretická analýza metody sloupku pro zjišťování zbytkových napětí." Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-234010.

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Comprehensive analysis of the ringcore method used for the determination of the residual stresses in mechanical components is presented in this thesis. Principles, advantages, disadvantages and applicability of this semidestructive experimental method are discussed too. At the same time the ringcore method is compared with the hole drilling method, which is used more frequently. All aspects of the ringcore method are analyzed by the finite element method. FE simulations, performed on the universal numerical model, verified principles of the integral method and the incremental strain method. FE simulations also provided basic information for the uncertainty analysis, which significantly affects the accuracy of the residual stress measurement. The main goal, which the present work deals with, is to create a global overview of all ringcore methods´ aspects elaborated in a clear and complex form.
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Books on the topic "Strain Gauge analysis"

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Kniskern, Marc W. Analysis of a six-component, flow-through, strain-gage, force balance used for hypersonic wind tunnel models with scramjet exhaust flow simulation. Raleigh, [N.C.]: North Carolina State University, Dept. of Mechanical and Aerospace Engineering, 1990.

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Kniskern, Marc W. Analysis of a six-component, flow-through, strain-gage, force balance used for hypersonic wind tunnel models with scramjet exhaust flow simulation. Raleigh, [N.C.]: North Carolina State University, Dept. of Mechanical and Aerospace Engineering, 1990.

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Kniskern, Marc W. Analysis of a six-component, flow-through, strain-gage, force balance used for hypersonic wind tunnel models with scramjet exhaust flow simulation. Raleigh, [N.C.]: North Carolina State University, Dept. of Mechanical and Aerospace Engineering, 1990.

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Wong, Michael King Wai. Experiments and analysis to understand the response of lateral piezoresistance gauges under dynamic loading. 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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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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Book chapters on the topic "Strain Gauge analysis"

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Dolhof, Vâclav. "Evaluation of Strain Gauge Measurements in Elasto-Plastic Area." In Experimental Stress Analysis, 429–37. Dordrecht: Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4416-9_47.

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Lapkova, Dora. "Using a Strain Gauge Load Cell for Analysis of Round Punch." In Lecture Notes in Electrical Engineering, 144–53. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-14907-9_15.

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Valeev, A., and A. Tokarev. "Locating of Oscillating Defect in Rotary Equipment via Remote Strain Gauge Analysis." In Lecture Notes in Mechanical Engineering, 309–18. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-22041-9_35.

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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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Rasia, Luiz Antonio, Edmilton Oliveira Stein, Humber Furlan, and Carlos Eduardo Andrades. "Design and Structural Analysis of a Machine for Characterizing Strain Gauge on Paper Substrate." In Communications in Computer and Information Science, 118–25. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-61834-6_11.

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Sharpe, W. N. "A 20 Kilohertz Optical Strain Gage." In Experimental Analysis of Nano and Engineering Materials and Structures, 329–30. Dordrecht: Springer Netherlands, 2007. http://dx.doi.org/10.1007/978-1-4020-6239-1_163.

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Kreuzer, Manfred. "How to Avoid Errors Caused by Heat Effects in Strain Gage Measurements when Using Scanning Units." In Experimental Stress Analysis, 447–54. Dordrecht: Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4416-9_49.

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Masithulela, F. "Structural behaviour of newly designed rail vehicle including failure analysis: Finite element and strain gauges." In Insights and Innovations in Structural Engineering, Mechanics and Computation, 2016–20121. Taylor & Francis Group, 6000 Broken Sound Parkway NW, Suite 300, Boca Raton, FL 33487-2742: CRC Press, 2016. http://dx.doi.org/10.1201/9781315641645-334.

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Zheng, Xiao Ling, Min You, Yong Zheng, Hai Zhou Yu, and Chun Mei Yang. "Testing and Analysis of the Inner Stress in Adhesive Coating Layer Using Strain Gauges and Finite Element Method." In Materials Science Forum, 667–71. Stafa: Trans Tech Publications Ltd., 2005. http://dx.doi.org/10.4028/0-87849-969-5.667.

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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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Conference papers on the topic "Strain Gauge analysis"

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Batchelder, David N., and Costas Galiotis. "The Raman Optomechanical Strain Gauge." In Stress and Vibration: Recent Developments in Measurement and Analysis, edited by Peter Stanley. SPIE, 1989. http://dx.doi.org/10.1117/12.952903.

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Yamaguchi, Ichirou, Koichi Kobayashi, and Shigesumi Kuwashima. "A Stabilized Laser Speckle Strain Gauge." In Stress and Vibration: Recent Developments in Measurement and Analysis, edited by Peter Stanley. SPIE, 1989. http://dx.doi.org/10.1117/12.952904.

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Edwardson, S. P., K. G. Watkins, G. Dearden, P. French, and J. Magee. "Strain gauge analysis of laser forming." In ICALEO® 2002: 21st International Congress on Laser Materials Processing and Laser Microfabrication. Laser Institute of America, 2002. http://dx.doi.org/10.2351/1.5065607.

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Liu, Lihua. "Noise Analysis for Strain Gauge Bridge Driving Circuit." In 2015 6th International Conference on Manufacturing Science and Engineering. Paris, France: Atlantis Press, 2015. http://dx.doi.org/10.2991/icmse-15.2015.135.

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Das, Sumit Kumar, Joshua R. Baptist, Ritvij Sahasrabuddhe, Woo H. Lee, and Dan O. Popa. "Package analysis of 3D-printed piezoresistive strain gauge sensors." In SPIE Commercial + Scientific Sensing and Imaging, edited by Dan Popa and Muthu B. J. Wijesundara. SPIE, 2016. http://dx.doi.org/10.1117/12.2224352.

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Liu, Zutao, Qing-An Huang, and Yanfeng Jiang. "Error analysis of micro strain gauge with a mechanical amplifier." In Photonics Asia 2002, edited by Guofan Jin, John S. McKillop, and Kazuhiro Hane. SPIE, 2002. http://dx.doi.org/10.1117/12.483180.

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Alex, Christina, Ashish Meeruty, M. N. Patel, and Seema Nihalani. "Comparative analysis of mechanoluminescence material (ZnS:Mn) and strain gauge sensor." In THIRD INTERNATIONAL CONFERENCE ON INVENTIVE MATERIAL SCIENCE APPLICATIONS: ICIMA 2020. AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0026246.

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Jamshidi, Babak, Robert G. Azevedo, Anand V. Jog, and Albert P. Pisano. "Enhanced Cross-Axis Rejection Capacitive Strain Gauge." In ASME 2007 International Mechanical Engineering Congress and Exposition. ASMEDC, 2007. http://dx.doi.org/10.1115/imece2007-43168.

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A novel bending plate capacitive strain gauge is designed, fabricated, and tested to measure strain in the range of 1 to 1000 με. This silicon-based strain sensor uses a unique structural design to increase the on-axis gain through the use of a bending beam structure while attenuating signals due to cross-axis strain. A differential capacitive measurement is used to improve the output, reduce the parasitic capacitance, and eliminate the capacitance measurement error due to temperature. The device is fabricated using silicon-on-insulator (SOI) technology. Experimental results exhibit an on-axis sensitivity of 50 aF/με and attenuation of the cross-axis sensitivity to shear strain to less than 10 percent of the applied shear strain. A detailed mechanical analysis of the suspension and deflection-amplifying bent-beam capacitor will be presented. Furthermore, the capacitive plate analytical model is compared to finite element simulations and verified with experimental results. In addition, a noise assessment of the device shows the electronics noise dominates the Brownian noise.
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Florizone, Donald J. "Using Finite Element Analysis Combined With Strain Gage Testing to Do Proof Test to Establish MAWP." In ASME/JSME 2004 Pressure Vessels and Piping Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/pvp2004-2590.

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An amine reboiler was constructed with very large openings in one semi-elliptical head. The openings extended beyond the “spherical” portion of the head into the knuckle region. The vessel was designed to 1998 ASME Section VIII Division 1 (VIII-1). Initially the manufacturer of the amine reboiler vessel chose the proof test after the calculations submitted to the approval agency were not accepted. Non-destructive strain gage proof testing per VIII-1 UG-101(n) was planned, but the minimum proof test pressure to achieve the desired MAWP exceeded the maximum firetube flange test pressure therefore an alternate method was chosen. Finite element analysis (FEA) was done in addition to the strain gage testing. The strain gage results at the maximum hydrotest pressure were used to verify the FEA calculations. The FEA calculated strains were higher than the measured strains. This indicated that the assumptions made in the computer model were conservative. By combining FEA with strain gauge testing, the design was proven to meet Code requirements.
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Iliev, Dian Milchev, Emil Nikolov Dimitrov, and Mityo Georgiev Mitev. "Design Requirements and Static Performance Analysis of a Strain Gauge Anemometer." In 2019 IEEE XXVIII International Scientific Conference Electronics (ET). IEEE, 2019. http://dx.doi.org/10.1109/et.2019.8878656.

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