Video extensometer.The videoXtens video extensometer A video extensometer is a device that is capable of performing stress/strain measurements of certain materials, by capturing continuous images of the specimen during test, using a frame grabber or a digital video camera attached to a PC. is aimed at materials testing Articles on Materials testing include:
n. An instrument used to measure minute deformations in a test specimen of a material. [extens(ion) + -meter. could be damaged by whiplash whiplash n. a common neck and/or back injury suffered in automobile accidents (particularly from being hit from the rear) in which the head and/or upper back is snapped back and forth suddenly and violently by the impact. from a fracturing specimen, such as the testing of belts. All strain related test results, such as offset yield/proof stress, yield point elongation, r value and strain to failure are measured automatically. For the measurement of the reduction in width of the specimen during the test, the extensometer uses sophisticated edge detection technology, which is said to save time by avoiding the need for the operator to attach a second pair of marks to the sample. The video extensometer is attached to the test machine frame using a secure, yet flexible mounting unit which is said to ensure perfect alignment with the axis of the the diameter of the sphere which is perpendicular to the plane of the circle. See also: Axis testing machine and the specimen being tested. Using the extensometer with the testing machine is said to be siimple. Zwick USA www.zwick.com |
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