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Upper Crosshead and Lower Crosshead. The upper crosshead is used to clamp one end of the test specimen. The lower crosshead in the load frame is the movable crosshead whose screws can be loosened for height adjustment and tightened. Both the crossheads have a tapered slot at the center.
Upper Crosshead and Lower Crosshead The test specimen is clamped at one end using the top crosshead. The moveable crosshead in the load frame is the lower crosshead, and its screws can be loosened and tightened to change the crosshead's height.
Cross head. The part of the Universal Testing Machine that moves up and down during the testing process. It can be powered by an electrical motor or a servo-hydraulic driver. Extensometer. Equipment capable of determining useful calculations like the Modulus of Elasticity, Secant Modulus and Poisson’s ratio.
Each specification requires that the force be applied at a specific strain, crosshead position or stress rate. One function of the testing machine controller is to ensure that the specified test rate is accurately maintained throughout the test.
Cross head - A movable cross head (crosshead) is controlled to move up or down. Usually this is at a constant speed: sometimes called a constant rate of extension (CRE) machine.
A typical tensile testing machine consists of a load cell, crosshead, extensometer, specimen grips, electronics and a drive system. It is controlled by testing software used to define machine and safety settings and store test parameters specified by testing standards such as ASTM and ISO.
15 de sept. de 2018 · The universal testing machine is a material testing machine used for static testing such as a tensile test or compressive test. It is also known as UTM. In this article, we have discussed the construction and the working principle of the UTM.
