Sdfsd Essay

1784 WordsJul 8, 20118 Pages
Experiment Title: Uniaxial Compression Test using Strain Gauge Introduction The uniaxial compression test is conducted to determine the uniaxial compressive strength (UCS) of a cored rock sample. The uniaxial test is probably the most important laboratory rock mechanics test. It is important index property that gives an indication of the overall strength of the rock. It is also a material property that is used in rock strength formulas. The UCS is an expensive and time-consuming test to conduct in the lab. The ends have to be ground down to make them parallel to a specified tolerance, and a loading frame with high load capacity is usually required. It also requires long samples with a length/diameter ratio of at least 2, which are sometimes difficult to obtain when coring weak or highly fracture rock. Due to these reasons, several simpler tests have been developed to estimate the USC, including the Point Load test was the subject of a previous lab. The uniaxial compression can also be used to determine the elastic constants of the rock (Young’s modulus and Poisson’s ratio, for example) if the axial and lateral deformations are measured during loading with strain gages. Objective To understand and investigate the mechanical properties of Aluminum alloy using strain gauge in compression test. Experimental procedures Start up Procedure 1. The cylindrical Aluminium alloy test specimen piece was put on the Universal Compression Tester together with a rigid spacer. Position them in the centre of the pressure plates of the machine. 2. The wires of which strain gauge attached/ cemented on the cylindrical Aluminium alloy is making sure that face the front and the wire connected to the strain gauge is not tangled with machinery. 3. The gap between the pressure plates was closed until they platforms are touching while the gauge on the

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