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Wednesday, March 30, 2011

DOUBLE SHEAR TEST ON STEEL BAR


DOUBLE SHEAR TEST ON STEEL BAR


Aim:

To determine the maximum shear strength of the given bar by conducting double- shear test.

Apparatus and specimen required:

1. Universal Testing machine (UTM)
2. Mild steel specimen
3. Device for double shear test
4. Veriner caliper / screw gauge

Procedure:

  1. Measure the diameter (d) of the given specimen.
  2. Fit the specimen in the double shear device and place whole assembly in the UTM.
  3. Apply the load till the specimen fails by double – shear.
  4. Note down the load at which the specimen fails (P).
  5. Calculate the maximum shear strength of the given specimen bu using the following formula:
Maximum shear strength =    Load at failure (P) in N
                                                          2 x cross – sectional area of the bar in mm2



Result:

The maximum shear strength of the given specimen = ----------------------- N/mm2

Observation:

1. Material of the specimen                 =
2. Diameter of the specimen, d           =                           mm
3. Load at failure, P                            =                            Kn

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