Objective :

To study the behavior of the mild steel rod subjected to a gradual increasing equal loads at 1/3rd span and to determine mechanical properties.

Apparatus used:

Universal Testing Machine, Dial Indicators, Scale and Vernier calipers.

Measure the Initial Diameter of the bending test sample in two perpendicular directions using vernier caliper, calculate the initial area and Moment of Inertia.

Cross sectional area of the specimen =

=

mm²

Moment of Inertia =

=

mm⁴

Measure the length of the specimen using scale keeping the span of the beam as L= 690mm based on the limitation of the experimental setup.

Based on the span of the beam being L= 690mm mark on the test sample Mild Steel rod by using a chalk at the mid-span and one-third loading points where a dial gauge is placed.

Insert the specimen between the special 2-Point loading setup with roller supports which is being fixed on the lower crosshead of the Universal Testing Machine. Adjust all the dial gauges to zero.

Start the loading process, note down the deflections using dial gauges under mid-span, one-third span.Stop the experiment once the specimen has been yielded.

Click on green button to
start the loading process

Click on red button to
stop the loading process

Once the yield limit is crossed, the specimen Mild Steel rod will have a permanent bend or deformation as it has crossed the elastic limit.

Plot load vs deformation at mid-span

Plot theoretical deflection at one-third span vs average experimental deflection at one-third span within elastic limit.