from The American Heritage® Dictionary of the English Language, 4th Edition
- n. An instrument used to measure minute deformations in a test specimen of a material.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. an electro-mechanical device for measuring changes in linear distance integral to an object undergoing deformation
from the GNU version of the Collaborative International Dictionary of English
- n. An instrument for measuring the extension of a body, especially for measuring the elongation of bars of iron, steel, or other material, when subjected to a tensile force.
from The Century Dictionary and Cyclopedia
- n. An apparatus for measuring minute degrees of expansion or contraction in metal bars under the influence of temperature or under strain. See expansion.
- n. In the instrument devised by Lavelle, a metal rod is surrounded by a steam-jacket whose temperature is indicated by two thermometers. The lower end of the rod rests at the bottom of the jacket, while the upper end passes through a movable metal cap which acts as a support for a spherometer (not shown in cut), by means of which the expansion of the rod is accurately measured.
Zwick's videoXtens extensometer, which is rigidly fixed to the machine frame, allows for non-contact strain measurements of materials that undergo medium to large deformations.
That is to say, if a delicate caliper ( "extensometer," so called) be fixed to the side of the test specimen, it would show the piece to be somewhat longer under load than when free.
It is also equipped with accessory measuring instruments; these include a Henning extensometer, an Olsen compressometer, and a Ewing optical extensometer of great delicacy.
It is also equipped with accessory measuring instruments; these include a Riehle extensometer, an Olsen compressometer, and a Ewing optical extensometer of great delicacy.
Olsen compressometer; and a Ewing optical extensometer of great delicacy.
It is also equipped with accessory measuring instruments, which include a Riehle extensometer; an
However, if the load had been excessive, and then relieved, the extensometer would no longer read exactly 2.0 in., but something more.
For versatile materials testing to 10kN (2,248lbf), the LR10KPlus twin-column materials tester, equipped with an EX800Plus contacting extensometer, will be on show, together with the
The extensometer is equipped to capture both axial and transverse strains simultaneously in separate input channels.
This universal, high-resolution extensometer records strain in both elastic and plastic ranges during the entire tensile test up to specimen break.