CLICK HERE FOR INDEX PAGE

TESTING MATERIALS IN INDUSTRY

V. Ryan 2012

 

PDF FILE - CLICK HERE FOR PRINTABLE WORKSHEET

 

By V.Ryan HARDNESS TESTING MACHINE

A sample test material is clamped on the table. As the operator rotates the table handles, the table is moved upwards until it comes in contact with the ‘test point’. The dial is set to ‘0'.
Further turning of the table handles increases pressure between the surface of the sample material and the ‘test point’. The resulting indentation is measured on the dial. This gives a measure of the samples ‘hardness’.
   
By V.Ryan TENSILE TESTING MACHINE

A sample test material is securely clamped between the top and lower vices. The tensile dial is set to ‘0'. A motor is turned on, slowly moving the top vice away from the lower vice, stretching the test material. When the test material ‘snaps’, the final tensile dial reading is taken, displaying the tensile strength of the sample.
 
 
 
By V.Ryan DUCTILITY TESTING MACHINE

A test sample of steel wire, is secured between the fixed vice and the rotating vice of the ductility tester. The test material is then twisted by rotating the handle. The ductility of the test sample is determined by the number of times the handle rotates, before the sample breaks. The type of fracture also indicates the ductility properties of the wire..
   
By V.Ryan ELASTICITY TESTING MACHINE

The test material is secured between the fixed vice and the moving vice. The dial is set to ‘0'. A motor then controls the moving vice, allowing it to traverse (move) a set distance from left to right. The material is then allowed to return to its original position, when the motorised vice returns to ‘0'.
The amount of left and right movement is slowly increased, with the vice returning to its original position. This tests the flexibility of the material. Eventually the amount of movement is such that the material cannot return / flex back to its original position. The dial measures this distance and it is a measure of the materials elasticity.
 
 
 
CLICK HERE FOR RESISTANT MATERIALS INDEX PAGE
 

 

Google
 
Web www.technologystudent.com