Courses Covered
Strength of Materials
Labs
Theory of Machines
Lab Instructor:
Engr. Sulaiman Dawood Barry
For lab queries email at [email protected]
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Table of Contents
Pictorial view of Mechanics Lab .................................................................................................................... 3
Mechanics of Materials Lab ................................................................................................................4
Apparatus’ Objectives ................................................................................................................................... 4
Hooke’s Law Apparatus......................................................................................................................... 4
Forces and Moments Apparatus ........................................................................................................... 4
Tensile Testing Machine ....................................................................................................................... 4
Torsion Testing Apparatus .................................................................................................................... 5
Beam Apparatus.................................................................................................................................... 5
Theory of Machines Lab .....................................................................................................................6
Apparatus’ Objectives ................................................................................................................................... 6
Slider Crank Mechanism ....................................................................................................................... 6
Screw Jack Apparatus............................................................................................................................ 7
Worm And Wheel Apparatus ................................................................................................................ 7
Spur Gear Lifting Apparatus .................................................................................................................. 7
Four Bar Linkage.................................................................................................................................... 7
Constant Velocity Joint ......................................................................................................................... 8
Whitworth Quick Return Mechanism ................................................................................................... 8
Cam And Follower Apparatus ............................................................................................................... 8
Bevel Gear Model.................................................................................................................................. 8
Bevel Helical Gear Model ...................................................................................................................... 9
Flywheel Apparatus............................................................................................................................... 9
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Pictorial view of Mechanics Lab
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Mechanics of Materials Lab
Apparatus’ Objectives
Hooke’s Law Apparatus
To determine the spring constant of
 Tensile
 Compression spring
Forces and Moments Apparatus
To determine the following at different position and
quantity of masses
 Forces
 Moments
Tensile Testing Machine
To determine Young’s Modulus and Compare it with the
reference book and Percentage elongation of specimen
materials
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Torsion Testing Apparatus
To investigate the relationships between
 the moment (torque) applied to a member,
 the material,
 member length, and
 Torsional deflection.
Beam Apparatus
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To compare actual reaction forces due to known loads with theoretical reaction forces and find any
errors.
To prove the overall relationship between stiffness, material property and beam dimensions.
To prove the theory of Pure Bending and find Young’s Modulus for the beam by experiment.
To prove the reciprocal theory applied to a beam.
To show how to use influence lines to predict deflection for any given loads or loads.
To prove the theory for continuous beams.
To prove the theory for a simply supported beam with a central prop.
To show how to use the cantilever test to find the Young’s Modulus for a beam.
To prove the theory for a propped cantilever with a rigid prop.
To prove the theory for a propped cantilever with elastic prop, and find the stiffness of the elastic.
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Theory of Machines Lab
Apparatus’ Objectives
Slider Crank Mechanism
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To analyze the variation of displacement of piston in relationship with
crank angle & draw graph between crank angle & piston
displacement.
To calculate the Velocity of Piston from displacement of piston &
draw graph of Velocity versus crank angle.
To investigate the variation of acceleration of piston & draw its graph.
Wheel & Axle Apparatus
To determine the effort required to lift a load and efficiency of lifting by a
wheel and axle.
Wheel & Differential Axle Apparatus
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To determine the effort required to lift a load and efficiency of
lifting by a wheel and differential axle.
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Screw Jack Apparatus
To find the mechanical advantage, velocity ratio and efficiency of a simple
screw jack and plot the graph:
(i)
Efficiency v/s Load
(ii)
Effort v/s Load.
Worm And Wheel Apparatus
To find the mechanical advantage, velocity ratio, and efficiency of worm
and worm wheel and plot a graph of
1. Efficiency v/s load and;
2. Effort v/s load.
Spur Gear Lifting Apparatus
To find the Mechanical Advantage, Velocity Ratio and Efficiency of a
Compound Spur Gear.
Four Bar Linkage
1. To analyze the variation of displacement of oscillating Rocker in
relationship with Crank rotation & draw graph between Rocker
Oscillation & Crank rotation.
2. To calculate the Velocity of Rocker from its displacement & draw
graph of Velocity versus Time.
3. 3. To investigate the variation of acceleration of Rocker & draw its
graph.
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Constant Velocity Joint
To analyze the variation of displacement of a constant velocity joint.
Whitworth Quick Return Mechanism
1. To analyze the variation of displacement of oscillating Rocker in
relationship with Crank rotation & draw graph between Rocker
Oscillation & Crank rotation.
2. To calculate the Velocity of Rocker from its displacement & draw
graph of Velocity versus Time.
3. To investigate the variation of acceleration of Rocker & draw its
graph.
Cam And Follower Apparatus
To understand the working of cam and follower and to draw displacement
curves.
Bevel Gear Model
Introduction to Bevel Gears
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Bevel Helical Gear Model
Introduction to Bevel Helical Gears
Gear Trains Apparatus
Introduction to Gear Trains
Epicyclic Gear Train Model
To find the gear ratio of the epicyclic gear experimentally and compare it
with the theoretical results.
Flywheel Apparatus
To calculate the moment of inertia of the flywheel experimentally
and compare it with the theoretical values.
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