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Showing 1 to 20 of 60 for “"strain gage"”.
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Dynamic strain gage balance for M.I.T. transonic wind tunnel
Thesis (M.S.) Massachusetts Institute of Technology. Dept. of Aeronautical Engineering, 1951.
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Masticatory properties of foods by the strain gage denture tenderometer
Thesis (Ph.D.) Massachusetts Institute of Technology. Dept. of Food Technology, 1957.
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Comparison of Strain Gage and Fiber Optic Sensors On A Sting Balance In A Supersonic Wind Tunnel
… been designed to replace the conventional foil strain gage sensors commonly found on balances, thereby offering several distinct advantages. The use of fiber optic sensors on a balance brings with it some potential advantages over conventional strain gage balances including increased resolution …
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Residual Stress Measurements of Unblasted and Sandblasted Mild Steel Specimens Using X-Ray Diffraction, Strain-Gage Hole Drilling, and Electronic Speckle Pattern Interferometry (ESPI) Hole Drilling Methods
… different techniques: X-ray diffraction (XRD), strain-gage hole drilling (SGHD), and electronic speckle pattern interferometry (ESPI) hole drilling, and to validate the new ESPI hole drilling method by comparing its measurement results to those produced by the SGHD method. Both the XRD and SGHD …
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An evaluation of the Iosipescu specimen for composite materials shear property measurement
… An experimental investigation using conventional strain gage instrumentation and moire interferometry is performed. A finite element analysis of the Iosipescu shear test for unidirectional and cross-ply composites is used to assess the uniformity of the shear stress field in the vicinity of the …
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New Field Testing Procedure For Measuring Residual Stress in Plain Concrete Pavements and Structures
… hole is drilled adjacent to an affixed surface strain gage (ASTM E837 2008). Based on the geometry of the test procedure, the change in strain reading is correlated to a residual stress in the steel material. While rigid pavements are as detrimentally affected by the formation of residual …
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The measurement of the running torque of oil and grease lubricated instrument ball bearings under combined radial and axial loads
… method employed relied on the amplification of strain gage signals by a strain gage indicator and an x-y plotter. The strain gages were used to detect the strain at the base of a small beam that prevented rotation of the outer race.of a test bearing while the inner race was driven at test speed …
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Development of a statistical method for validating ESDM strain-field output
… a statistical method for validating the ESDM strain-field output. Specifically, it addresses the problems of estimating the ESDM strain-field uncertainty, choosing an appropriate standard measurement, estimating the uncertainty in the standard measurement, and comparing the ESDM strain-fields …
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An Optical Method of Strain Measurement in the Split Hopkinson Pressure Bar
… methods of testing materials at medium rates of strain. Elevated rates of strain, such as those found in impact and explosive applications, have been shown to induce phenomena such as strain hardening and phase transitions that can significantly affect the strength of most materials [14]. Due to …
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Model Validation for a Steel Deck Truss Bridge over the New River
… of lacing effects on built up member strain detection, live load testing of a steel truss bridge, and evaluating modeling techniques in comparison to recorded data. Before any live load testing could be performed, it was necessary to confirm an acceptable strain gage layout for …
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Dynamic Fiber Debonding and Push-Out in Model Composites
… by a combination of quartz crystal transducer-strain gage measurement; (b) the crack initiation and propagation was explored by a custom crack detection system. Experimental observations further confirmed the numerical analysis results.
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An Evaluation of Optical Fiber Strain Sensing for Engineering Applications
… gratings. These fibers were bonded with AE-10 strain gage adhesive. The results indicate that lower strain amplitudes do not produce cause for concern, but that larger strain amplitudes (on the order of 3500 μ) may cause some sensors to become unreliable. The strain response of acrylate coated …
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A Self-contained Wireless Structural Health Monitoring Tool
… (NDI) techniques. NDI crack detection and strain measurement systems are currently used in critical areas of structures, but are limited due to needing wires for communication and a power source. Although these SHM technologies continue to develop, becoming more and more precise, a lighter …
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Tractive Performance From Axle Instrumentation
… forces in an unreduced section of axle. Two four-gage, constant current, semiconductor strain gage bridge circuits were developed to measure the strains associated with the bending forces. The analog strain signals were converted to FM signals on the axle. A multi-channel capacitor with rotating …
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A Novel Approach to Residual Stress Measurement
… thesis provides an authentication of a novel strain measurement and residual stress calculation method. This method is heavily rooted in the fields of optical strain measurement and elementary solid mechanics. The types of measurements discussed involve using two specialty optical strain gages …
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An investigation of shear response of composite material systems
… systems is presented. The uniformity of the strain fields is studied experimentally and numerically for different specimen configurations. Conventional strain gage measurements and the moiré interferometry technique are employed to obtain information of actual deformation of the specimen. …
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Mechanistic Analysis of in-Service Airfield Concrete Pavement Responses
… on Multi-Depth Deflectometers (MDDs) and paired strain gage data, respectively. Two interface conditions (bonded and unbonded) were compared to measured responses allowing for estimating in-situ interface condition.
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Grease particle deposition measurements in a kitchen exhaust duct for the development of low cost grease sensors.
… The use of a cylinder in cross flow with a strain gage arrangement and a LED-photo resistor arrangement on two opposite walls of a 0:254 m by 0:203 m (10 inches by 8 inches) duct at two exhaust velocities namely 2:54 m/s (500 ft/min) and 7:62 m/s (1500 ft/min) were investigated. The size …
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Development of instrumentation for acoustic monitoring
… to the amplified force can be measured with a strain gage whose voltage is proportional to this deflection. A microphone should be used to record high frequency sound generated by the fluid inside the transmission line. (Abstract shortened by UMI.).
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Analysis of acoustic emission waveforms from fatigue cracks on a steel bridge hanger
… for acoustic emission in conjunction with strain gage monitoring. Waveforms of emissions were collected and classified using source location, strain magnitude, position on strain cycle and uniqueness of waveforms as the primary criteria. A vast majority of AE from the cracks were found to …
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