University of Engineering & Technology Taxila
Department of Industrial Engineering
Lab Session # 01
Course Title: Mechanics of Materials
Lab Instructor: Mr.Waqar Ahmed
Semester: 4th
Session: 2K22
Total Marks:
Obtained Marks:
Name of Student:
Roll No:
Evaluation Sheet
Knowledge components
Domain
Student has conducted the
experiment by practicing the
hands on skills and following
standard procedures.
Student has achieved required
accuracy in performance and
Calculations.
Student is aware of safety rules
Student used the safety
equipment during experiment.
Student has followed all the
timelines provided during the
lab session
Student is aware of the basic
concepts
Student has analyzed and
compared the results.
Taxonomy level
Contribution
Affective
Obtained
marks
10
Manipulate (P2)
Psychomotor
Max.
marks
70%
Precision (P3)
5
Receiving (A1)
3
Respond (A2)
20%
3
2
Valuing (A3)
Knowledge (C1)
Cognitive
10%
2
Total
25
Normalize
marks out of
(5)
5
Evaluate (C4)
Lab Instructor’s Signatures: _________________________________
Safety Instructions for the Experiment
Work deliberately and handle the weights carefully.
Do not wear open toed shoes.
Remove the weights after taking readings.
Objective
Determination and comparison of deflection of a simply supported beam under the action of
concentrated loads applied at the center of the beam.
Apparatus
1. Beam Deflection Apparatus
5. Weight Pan
2. Beam
6. Slotted Weights
3. Vernier Calipers
7. Level Gauge
4. Dial Gauge
8. Geometry Box
Theory
A beam is a structural element that primarily resists loads applied laterally to the beam's axis. Its
mode of deflection is primarily by bending. The loads applied to the beam result in reaction forces
at the beam's support points. The total effect of all the forces acting on the beam is to produce
shear forces and bending moments within the beam, that in turn induce internal stresses, strains
and deflections of the beam. Beams are characterized by their manner of support, profile (shape of
cross-section), length, and their material.
Construction
Beam deflection apparatus consists of a measuring scale and supports mounted on L shaped
brackets. On the supports, beam is placed and a dial gauge is mounted on the upper bar of the
apparatus shown
Procedure
1. Take the rectangular cross section of the beam using Vernier calipers
2. Measure the length of the beam
3. Place the beam on the knife edge supports in such a way that midpoint of beam is in the middle
of the supports
4. Attach a weight pan at the midpoint of the beam and fix the dial gauge over the weight pan
5. Set the reading of the dial gauge to zero and note down the least count of the dial gauge
6. Apply the weight on the beam and note the deflection of the beam by taking reading of the dial
gauge
7. Take four readings and calculate theoretical deflections by using formula of deflection of the
beam
8. Compare experimental and theoretical values of the deflection and draw graph.
Precautions
1. Do not take readings unless the weights are in rest position.
2. Avoid dropping the weights while performing the experiment.
3. Do not apply the loads for longer period of time.
4. Level the apparatus before the start of experiment.
5. Note the zero error of the dial gauge.
Results
Observations
Length of the beam
Width of the beam
Height of the beam
Young’s Modulus
Sr. No.
Weight (N)
1
2
3
4
Sample Calculations
Deflection
Moment of Inertia
Deflection
Percentage
(exp.) (mm)
of the beam (mm4)
(th.) (mm)
Error
Graphical Results
Conclusion
Comments
State the mass moment of inertia and define the area moment of inertia of the beam
Differentiate among different types of beams based on the supports and explain the reactions
provided by each type of support.
State the safety measures you have taken while performing the experiment?
Write down the time taken for each task
Activity
Time Taken
Understanding
Performance
Analysis