2 edition of Development of high-temperature strain gages [by] J.W. Pitts and D.G. Moore. found in the catalog.
Development of high-temperature strain gages [by] J.W. Pitts and D.G. Moore.
J. W Pitts
by U.S. Dept. of Commerce, National Bureau of Standards in Washington
Written in English
|Contributions||Moore, Dwight Garrison, 1908-,|
|LC Classifications||TA413 P5|
|The Physical Object|
|Number of Pages||20|
In the early years of their development, around , strain gauges were used extensively for measuring strain in aircraft and similar structures at room temperatures, but in recent years the need to study strains in turbo-jet and similar engine components under operating conditions has stimulated the development of gauges capable of measuring. BONDED STRAIN GAUGE • A bonded strain-gage element, consisting of a metallic wire, etched foil, vacuum-deposited film, or semiconductor bar, is cemented to the strained surface. UNBONDED STRAIN GAUGE • The unbonded strain gage consists of a wire stretched between two points in an insulating medium such as air.
A Leader in Strain Gage Installations. One of our most essential data acquisition tools is the strain gage. Stress Engineering Services is a world leader in strain gage instrumentation. Each year we place more than 5, strain gages of all styles in a broad range of extreme environments and industries. Structures; Piping and Vessels. Research and development work is under way on the stainless steel boiling-potassium reactor and the Medium Power Reactor Experiment, boiling alkali metal heat transfer, high-temperature and refractory alloys, fuel material, and space reactor shielding, particularly in connection with SNAP 2, 8, 10, and
This guide covers the selection and application of strain gages for the measurement of static strain up to and including the temperature range from to °C ( to °F). This guide reflects some current state-of-the-art techniques in high temperature strain measurement, and will be expanded and updated as new technology develops. Strain gages are important components in engineering research and development for the direct measurement of the stress that occurs over the lifetime of a system. HITEC has more than 85 years of experience in precision strain measurement, having worked with a wide range of different customer supplied systems.
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Development of High-Temperature Strain Gages J. Pitts and D. Moore A summary is presented of a research program aimed at the improvement of high-temperature strain gages of the electrical resistance type.
Potential ceramic and metal components were evaluated and a gage was devised that was based on these by: Development of High-Temperature Strain Gages One of reports in the series: NBS monograph available Pitts, J.
& Moore, D. Development of High-Temperature Strain Gages, report, Ma ; Washington by: Development of high-temperature strain gages. [J W Pitts; Dwight Garrison Moore] Book: All Authors / Contributors: J W Pitts; Dwight Garrison Moore.
iv, 20 pages illustrations 26 cm. Series Title: NBS monograph, Responsibility: [by] J.W. Pitts and D.G. Moore. Reviews. User-contributed reviews Tags. Add tags for "Development of high. Suprock, Christopher A., Christian, Joseph J., and Rosinski, Stan T. "Development of High Temperature Semiconductor Strain Gages for Thermal Power Plant Applications." Proceedings of the ASME Pressure Vessels and Piping : Christopher A.
Suprock, Joseph J. Christian, Stan T. Rosinski. M series strain gauges are foil strain gauges for stress analysis of materials with high fatigue strength such as fiber composites.
They can also be used in product development, for example in the aerospace or sporting goods industries. In addition, M series strain gauges offer a very large temperature range. This paper describes the development and evaluation of temperature-compensated resistance strain gages for use to °C (°F).
These gages included single-element gage and double-element gages. The filament of single-element gages was fabricated from specially developed Fe−Cr−Al−V−Ti−Y alloy wire. When bonded to high-temperature Ni-based alloy GH30, the apparent strain from room.
ZC-Series strain gages are etched Kanthal (Fe-Cr-Al alloy) foil grids in free-filament form for high-temperature applications. They are bonded with either ceramic adhesives, or by the use of flame spray. ZC-Series strain gages cannot be self-temperature compensated, and a dummy compensating gage.
A strain gage’s electrical resistance varies in proportion to the amount of strain in the device. The most widely used strain gage is the bonded metallic strain gage.
The metallic strain gage consists of a very fine wire or, more commonly, metallic foil arranged in a grid pattern. It is difficult to bond a strain gauge to a bolt while measuring the tightening stress.
Normally, this requires the use of heavy machinery, but the application of special electrical strain gauges provides a simplified solution for measuring the axial load on bolt elements.
Strain Gages Structure of Strain Gages There are many types of strain gages. Among them, a universal strain gage has a structure such that a grid-shaped sensing element of thin metallic resistive foil (3 to 6µm thick) is put on a base of thin plastic film (15 to 16 µm thick) and is laminated with a thin film.
Laminate film Metallic resistive foil. Stress Analysis Strain Gages (Gauges) Structures can, and do, break. It’s critical to determine whether a particular object made from a particular material can carry a particular load. If a true stress is ignored, the cost of not acting is usually far higher than the cost of dealing with the problem earlier.
When bonded to high-temperature Ni-based alloy GH39 after stabilization at °C for one hour, the apparent strain from room temperature to °C was less than μm/m.
Double-element gages were fabricated from Pt−W−Re−Ni−Cr−Y alloy wire (active grid) and Pt−Ir alloy wire (compensating grid).
The strain gauge, deposited by r.f. sputtering onto nickel-based superalloys, is described. It consists of a NiCoCrAlY coating, insulating layer (Al 2,O 3), sensing layer (NiCr, PdCr), intermediate splicing layer (Pt) and a protective film (Al 2,O 3 or SiO 2).
NMB High Temperature Strain Measurement Sales, Revenue, Price and Gross Margin () KYOWA Company Profile Main Business and High Temperature Strain Measurement Information SWOT Analysis of KYOWA KYOWA High Temperature Strain Measurement Sales, Revenue, Price and Gross Margin () TML.
High Temperature Bondable Strain Gages Our bondable wire-wound strain gages have been the world’s premier high temperature strain gage for several generations. HPI staff has been involved with the manufacturing of these gages since their inception in the early ’s. ͑ a ͒ Piezoresistive response of a m thick ITO strain sensor at °C.
The strain sensor was subjected to a postdeposition heat-treatment in nitrogen and had a gage factor of and. Single-element and double-element types of gages for measuring static strain at temperatures up to C were developed along with a suitable ceramic cement for bonding. Grids of single-element gages were fabricated from a preoxidized Fe-Cr-Al-V-Ti-Y alloy wire.
The double-element gages were made from a Pt-W-Re-Ni-Cr-Y alloy wire (active grid) and a Pt-Ir alloy wire (compensating grid). Use of Strain Gages for Low Temperature Thermal Expansion Measurements Robert P. Walsh National High Magnetic Field Laboratory, E. Paul Dirac Dr., Tallahassee, FL The use of strain gages for low temperature thermal expansion measurements is increasing, due to it's convenience, and relative accuracy.
G = gage factor of the strain gage.† K t = transverse sensitivity of the strain gage. 0 = Poisson’s ratio () of the standard test material used in calibrating the gage for its gage factor.
† In this Tech Note, the gage factor of the strain gage is identified as F G, to distinguish it from the gage. wire strain gages each on two types of substrate materials applicable to hypersonic aircraft development.
The evaluation was conducted under the "High Temperature Strain Gage for Hypersonic Aircraft Development Application" program under Contract NAS The original Pratt & Whitney Program Manager was Howard P. Grant who retired in. °C. This is a °C advance in operating temperature over the PdCr wire gage and a °C advance over commercially available gages made of other materials.
Mechanical response of a PdCr thin-film strain gage. Bibliography Lei, J.-F.: High Temperature Thin Film Strain Gages. HITEMP ReviewNASA CP, Vol. I,pp. to Michigan Technological University students demonstrate procedure of high temperature strain gage calibration.High-Temperature Thin-Film Strain Gauges Benefits • Minimally intrusive.
A complete sensor unit is only 20 µm thick compared to µm of the conventional foil or wire strain gauge system. • Very high temperature operation. Sensors extend the maximum use temperature from the current capability of °C up to °C.