Determination of Strain in a Steel Bar
Apparatus:
Dividers, steel bar, specimen UTM, scale, vernier caliper.
Procedure:
-
Prepare a test specimen of at least 2ft.
-
Measure at least 3 places dia of steel bar by a VC and calculate the average value.
-
Mark the gauge length i.e 2 marks 8” apart.
-
Insert the suitable jaws in the grip and select a suitable load scale on UTM.
-
Start the machine and continue applying the load tile the specimen breaks and then stop the UTM.
-
Join the broken species of the tested specimen and measure the increase in gauge length.
-
Determine the value of strain by dividing increase in gauge length by gauge length.
