To perform the bend test of steel bar.

OBJECT: TO PERFORM BEND TEST OF STEEL BAR.

APPARATUS:

• Bend Table
• Bars
• Vernier Callipers
  

THEORY:

1. BEND TEST OF STEEL BAR
   
2. SPECIFICATION ACCORDING TO CODE
   

METHODOLOGY:

OBSERVATIONS:

• Diameter of steel bar = __________ mm = ________ inches
  
• Bar # = ____________________
  

CALCULATIONS:

RESULTS:

or

Object: Bending test of steel bars.

Apparatus: UTM, test specimen, bending table support pin.

Theory: A bending test is a method for measuring the stiffness and yield properties of certain materials. Bending tests for ductility provide a simple way to evaluate the quality of materials by their ability to resist cracking or other surface irregularities during one continuous bend. In certain cases, the bending test can determine tensile strength.

Procedure:

1. Take a test specimen of the steel rod.
2. Measure the diameter of the steel rod. Take at least 3 readings and calculate the mean.
3. Now place the test specimen in the bending table. The specimen should be kept in the bending table in such a way that the plane
4. Intersecting the longitudinal ribs is parallel to the axis of the pin.
5. Select a suitable range of scale.
6. Start the machine and start applying load continuously and uniformly throughout the bending.
7. As the load is applied to the rod it will start bending.
8. Discontinue the application of load when the bent angle specified in the material specimen has been achieved before rebound.
9. Take out the specimen and examine the tension surface of the specimen for cracking.

Specification for Angel in Bend Test:

Bar # 3toBar #11should bend up to 180 degrees without a crack
Bar # 14&Bar # 18should bend upto90 degree without crack

All specifications have been given inAASHTO(American Association for State Highway and Transportation Officials.

Bend Test Requirements: