enge1001 deflection of beams objective to verify the relationship betw
ENGE1001 - Deflection of Beams
To verify the relationship between load and deflection for a simply supported beam with
a single concentrated central load.
(Note: You may find other objectives after doing the experiment)
Knife edge supports, dial gauge, weights and weight carrier.
• 1 Mild steel bar
• 1 Brass bar
25.4mm x 4.76mm
25.4mm x 6.35mm
Set up each beam in turn centrally on knife edge supports near the ends of the beam.
Locate the dial gauge centrally between supports and set to zero.
Apply loads in 200 gram increments to 1600 grams, noting deflections.
• Repeat while removing loads.
NOTE: The beam should be vibrated gently before each reading is taken to ensure that it
is properly settled on the knife edges. You may take a picture of the setup for your report./nCalculations:
The equation for the deflection at the centre of the beam, for a simply supported beam
with a single concentrated central load, is as follows:
E for Mild Steel Beam:
E for Brass Beam:
W - Load (N)
E-Young's Modulus (N/m²)
Second moment of Area [about the Neutral Axis] (m¹)
b (breadth of the beam)
d (depth of the beam)
Complete the following table by showing the relevant calculations:
Cross section of the beam
Ploty / Deflection (mm) (Y-axis) vs. W / Load (N) (X-axis) for both beams in a single
• Is the deflection vs. load graph a straight line? Support your answer by (i) observing the
graph and (ii) with the help of the deflection equation.
• State three main errors that may have occurred in your assumptions and in the
• Discuss why the brass beam is deflected less compared to the mild steel beam for the
same load in this experiment; support this with evidence.
• Summarise key points/findings of the experiment
• Very briefly explains where this knowledge could be applied
• No more than 5 pages of report in total should be returned as additional pages will not
be marked. This does not include the cover page.
• Fonts should not be smaller than size 11.
The key for a good report is 5Cs - Clear, Concise, Complete, technically Correct and
• Show your calculations to prove that you know how to do them
• Make the report looks nice and well-formatted - reuse the tables from the lab sheet
but feel free to make adjustments
Use diagrams or photos where appropriate (with figure number and description)
*The amount will be in form of wallet points that you can redeem to pay upto 10% of the price for any assignment. **Use of solution provided by us for unfair practice like cheating will result in action from our end which may include permanent termination of the defaulter’s account.Disclaimer:The website contains certain images which are not owned by the company/ website. Such images are used for indicative purposes only and is a third-party content. All credits go to its rightful owner including its copyright owner. It is also clarified that the use of any photograph on the website including the use of any photograph of any educational institute/ university is not intended to suggest any association, relationship, or sponsorship whatsoever between the company and the said educational institute/ university. Any such use is for representative purposes only and all intellectual property rights belong to the respective owners.