Reference points may also be bolted to the structure. Extensometer is a 12 letter long word starting with e and ending with r. Geokonealey tape extensometer no part of this instruction manual may be reproduced, by any means, without the written consent of geokon, inc. It is useful for stressstrain measurements and tensile tests. Axial torsional extensometer for simultaneous measuring of axial and torsional deflections on specimens tested in axial torsional machines. Extensometer grips counterbalanced with thickness compensation interchangeable grip blades for sensitive materials tracking force less than 10 gms adjustable grip pressure specimen thickness range 0 to 5 mm dimensions width.
The magnetic extensometer system comprises a probe, a graduated tape on a reel and an access pipe along which magnetic targets are positioned at predetermined intervals. The geosense geoxb2 borehole rod type extensometer range is used to measure and locate settlement, displacement and deformation in soil and rock. An extensometer is a device that is used to measure changes in the length of an object. The single point rod extensometer is an inexpensive, simple, rugged, and reliable device to monitor deformation in under ground workings. Functions of the sie560a series, including the automatic detection of the midpoint between upper and lower grips, the automatic return to a specified gauge position, and the automatic release of specimens after testing is finished, ensure that routine testing can be performed conveniently and reproducibly. This paper describes the construction and calibration of the extensometer. Kostenlose online ocr pdf in word, jpeg in word konvertieren. May be used simultaneously with the model 3442 miniature axial extensometers or the model 3542 axial extensometers. Extensometer is an accepted word in word with friends having 23 points. Hypertext links the electronic document has many hypertext links displayed in a blue font. What informations can we get by using the extensometer during. Slide mounting system enables mounting to hot specimens in seconds. Rod extensometer single and double point the single point rod extensometer is an inexpensive, simple, rugged, and reliable device to monitor deformation in under ground workings.
Very high resolution and accuracy allow the determination of youngs modulus and the yield point rp0. Extensometer total number of words made out of extensometer 361 extensometer is an acceptable word in scrabble with 21 points. The extensometer provided the average extension of the selected length. Metals tension test with axial extensometer epsilon technology model 3542 duration. Extensometer definition of extensometer by the free. This extensometer provides the total solution for weighing, level control, stress and fatigue monitoring. The sis7000 series borehole extensometer electricalmechanical em, single or multipoint borehole extensometers are used to accurately measure longitudinal displacement in rock masses or concrete boreholes. A miniature extensometer designed for general purpose transverse or diametral strain measurements on small or thin specimens. This extensometer is used for measuring strain in hightemperature tension, compression and throughzero fatigue testing applications. They consist of a hollow anchor body, the sectional area and material of which corresponds to that of the rock anchor being monitored. Extensometer clipon extensometer exr100,5 ctspecimen with screwedon countercuts. Axial extensometer functional description 17 about dc conditioning 17 about wheatstone bridge 18.
The key features of the epsilon model 3542 include. An extensometer, sometimes also called a strain gauge, is a device which measures variations in an objects length. What is difference between the working of extensometer and. Extensometers model sis 70001 specification standard range up to 100 mm least reading 0. Automated actions and userfriendly operability increase testing throughput. Data can be obtained using a portable readout or connected into a data logger for automatic monitoring.
The ability to retrieve and reuse the model a9 can result in significant cost savings where repeated tests are required that would otherwise use either nonretrievable extensometers or strain gages. Extensometer article about extensometer by the free dictionary. T he tinius olsen model 100r is a high elongation extensometer that is designed to measure the stretch of a wide range of materials including elastomers and nonrigid plastics. An instrument used to measure minute deformations in a test specimen of a material. The model 178 extensometer is a load sensor designed for force measurement on any loadbearing structure. After the creation, an advanced word processor permits to edit, format and print the report. A lateral extensometer was provided at midheight of the column to measure the lateral strain. The reed switches within the probe detect the magnets as it moves. Jun 12, 2012 extensometry is the science of the measurement and analysis of changes in a materials linear dimensions during tensile testing.
Tensometer definition of tensometer by medical dictionary. In order to complete a 3d positioning in the space of the inspected casing the same must be measured by a traditional inclinometer also. The information contained herein is believed to be accurate and reliable. The model a9 retrievable extensometer is designed for. Extensometer definition of extensometer by merriamwebster. The magnetic extensometer system is installed at locations where monitoring of settlement or heave is required. Extensometers are used to accurately measure specimen extension during tensile testing. All blue words in the body text, along with all contents entries and. These variations can be so minute that they are not identifiable with the naked eye, or significant enough that someone can clearly visualize them.
The initial measuring length, or gauge length, can be changed to suit the specimen size or the test. The design also allows multiple sensors to be permanently mounted for more complex stress profiling and analysis. Extensometer definition is an instrument for measuring minute deformations of test specimens caused by tension, compression, bending, or twisting. Klion software for inclinometers and trex extensometer. Dear arvind, the extensometer is a device to measure the extension in the tensile test mainly in the linear part of the load extension stressstain curve.
Extensometers a for materials testing b c d e f g h i j k. Tape extensometer, 2008205 2 installing reference points overview reference points are stainless steel eyebolts that are threaded into groutable or expansion anchors. Analysis of borehole extensometer data from central california entire aquifer system in the elastic range. Extensometers a for materials testing b c d e f g h i j k l m. The instrument is used in an abs inclinometer on which are preinstalled appropriated magnet rings. Clipon axial extensometer type mini mfa 2 suitable for almost all types of samples up to o 25 mm or 25 x 25 mm and a gauge length lo of 100 mm. Extensometer definition, an instrument for measuring minute degrees of expansion, contraction, or deformation. Both versions use precision ground induction heating coils surrounding the specimen. The elongation of the material is a physical deformation of the sample and is a type of strain associated with tensile measurements.
Information and translations of extensometer in the most comprehensive dictionary definitions resource on the web. Designed for measuring rvalues in sheet metal testing, this extensometer averages the lateral strain at two locations. An extensometer is a measuring device designed to measure changes in the length of a specific object. The range of applications where extensometers are used is diverse and the technical requirements for these devices are. An extensometer is an instrument that measures test specimen elongation to characterize strain. Lateral extensometer article about lateral extensometer. Specifications for extensometers include gauge length, which is the distance between the knife edges at the start of the test and percent travel or elongation during test. What informations can we get by using the extensometer. W displacement sensors model sis 7001 specification borehole diameter 76 mm or over maximum length 100 m extensometer anchor type. A new borehole wire extensometer with high accuracy and. This essentially fails to provide variation of localized strains in inhomogeneous materials like a welded joint. Various starting measurement lengths can be obtained.
The model 1900 magnetic extensometer is designed to measure settlement or heave of soft ground under the influence of loading or unloading due to the construction of embankments, fills, buildings, and structures. A strainometer that measures the change in distance between two reference points separated 6090 feet 2030 meters or more. An extensometer is an instrument that measures the elongation of a material under stress. Accordingly, slopes of the stressstrain curve will be characterized numerically by strain per unit stress, the reciprocal of conven tional ratio, and the values will increase as the slopes become flatter. Pdf characterization of materials undergoing severe plastic deformation requires the careful measurement of instantaneous sample dimensions throughout. The double point extensometer incorporates the use of two points which allows the engineer to distinguish between dangerous deep seated movements and more trivial. Movement of rods attached to the anchors is measured relative to the head of the extensometer anchored at the mouth of the. Extensometer article about extensometer by the free.
A wide range including borehole rod, magnetic, and tape type extensometers typically used for monitoring excavations, foundations, dams, embankments, tunnels, shafts and sheet piles. Compatible with materials testing furnaces or induction heating. When mounted in a fixed position relative to a bank of soil or a rock face, extensometers are capable of measuring displacement movement with a high degree of accuracy. Hardened tool steel knife edges are easily replaced.
Pdf video extensometer assesses mechanical properties of materials by measuring their length changes under. The yearly cycles of stress increase and decrease, resulting from seasonal. An instrument designed to measure minute deformations of small objects subjected to stress. The incremental extensometer allows to measure a vertical component of the movement. It can be viewed on any computer that has adobe acrobat reader installed. Borehole extensometer mine design technologies mdt. A reedswitch probe is used in conjunction with magnetic anchors positioned at various depths in a. Operating principle rod extensometers are usually installed in boreholes with from one to eight borehole anchors.
It consists of a reference head and one or more inhole anchors each of which is placed at a known depth and connected to the reference head by either a rigid or flexible rod running inside a. The instrument is then fixed solidly in place, most commonly with grout. Since there is no contact between the extensometer and the sample, the 500lc is also ideal for measuring the elongation of fragile samples where such contact. The rod extensometer system is reliable, accurate and relatively simple to install and read. Gauge length adapter kits enable configuration of multiple gauge lengths with one extensometer.
This model may be used simultaneously with the model 3542 axial extensometer. We reserve the right to change our products without prior notice. Extensometry is the science of the measurement and analysis of changes in a materials linear dimensions during tensile testing. Extensometer definition of extensometer by the free dictionary. Pdf in word umwandeln kostenlos pdf zu word konvertieren. It is free from creep, kinking and other inaccuracies associated with the use of tensioned wire and can be coupled to a transducer readout for continuous or remote control. Within the anchor body there are four mini extensometer rods with anchor points at four different locations. In this configuration, the extensometer provides data about rock and ground movement in the. Rodtype borehole extensometers model a3, a4 and a5 multiple point extensometers left to right. It was invented by charles huston who described it in an article in the journal of the franklin institute in 1879. Strength and ductility of gfrp wrapped corrosiondamaged concrete columns in addition, a lateral extensometer was attached to the sample center. An automated confocal microextensometer enables in. For tensile tests conducted without extensometer, the nominal strain rate. Pdf a new video extensometer system for testing materials.
The extensometer in this case is shipped with the appropriate wiring and connector for direct plugging into the electronics. Retrievable extensometer integrates the strains over a larger and possibly more representative sample than would be obtained using strain gages. Model 500lc laser extensometer the tinius olsen model 500lc noncontacting extensometer is designed to measure the extension of medium to high elongation materials, typically elastomers. Pdf ultrasensitive video extensometer using singlecamera dual. May be used for straincontrolled, high frequency fatigue tests.
Apr 05, 2020 an extensometer, sometimes also called a strain gauge, is a device which measures variations in an objects length. Epsilon offers a range of solutions, enabling connection of the extensometer output to chart recorders, data acquisition boards or other equipment. An accurate determination and evaluation of the specimen deformation is a fundamental requirement in many material tests. It is useful for stress strain measurements and tensile tests. Extensometer definition and meaning collins english. A borehole extensometer used in a mining context is usually placed in a borehole drilled into the wall or roof of a tunnel, an open rock face, or a crown pillar on surface.