Design of vertical daylight and gripper in universal testing machine: a review

Tensile testing of any material is very critical quality measures in many manufacturing industries and building construction works. Global competition and enhanced customer awareness has increased the need of better durability of materials in tension. Nowadays universal testing machine is one of the most popularmachines to test the different materials in tension. There is different type of material on which the tensile test has been done, there are limitations for selecting the dimensions of the test specimen because of the fixed body structure of the Universal Testing Machine (UTM). The UTM have fixtures for holding the test specimen called gripper in which the both ends of the test specimen fitted. Gripper cannot hold the test specimen of bigger size which limits to test such specimen. As the UTM are made very compact hence it acquires less floor space so the vertical daylight and diameter of the test specimen cannot exceed than the pre-defined values. To increase the vertical daylight and test specimen size, the change should be made in the gripper design. This paper provides valuable insights of gripper design.