Engg Mechanics Lab
Transcript of Engg Mechanics Lab
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Department of Mechanical EngineeringUniversity of Engineering & Technology Lahore(KSK Campus).
(Statics & dynamics) LAB DATA
Lab Incharge: Engr. Muhammad AmjadLab Assistant: Abbas Ali
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Lay-Out of Engineering Mechanics Lab
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White BoardDOOR # 1 DOOR # 2
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2 3
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10 11
12 13
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Description of lab lay-out
1. Fly wheel2.
Linear and angular speed
3. Governors apparatus4. Static and Dynamics Balancing
Materials
5. Cam and Follower6. Toggle Joint7. Funicular polygon of forces8. Friction Machine9. Balancing Machine10.Crank and Slotted Lever
Mechanism
11.Four Bar Chain12.Ackerman Steering13.Slotted Link Mechanism14.Slider Crank Chain15.Whitworth Quick Return16.Duplex Screw Jack
17.Moment of Inertia18.
Warm and Warm wheel
19.Clutch Friction20.Friction of Belt21.Gear Train22.Epicyclic Gear Train23.Piston Crank24.Co-efficient of Friction25.Friction on Horizontal & Inclined
Plane
26.Portal Frame27.Redundant Truss28.Roof Truss29.Force Triangle30.Screw Efficiency31.Helical Gear32.Wheel and Axle
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Objective of the Lab
The objective of the lab is to perform experiments which are related to engineering
mechanics subject (Statics and Dynamics) in order to understand the behavior of different
mechanical equipments which students study in theory.
Moment of inertia
Objective:
To investigate the effects of mass,
distribution, radius of gyration and
acceleration on the moment of inertia.
1. To show that as the disc massvaries so does the acceleration.
2. To determine the radius of gyrationof the two arm boss unit.
3. To determine the effective radiusof gyration of inertia.
4. To show that if the mass is kept constant but its distribution varies then the accelerationcaries.
Toggle jointObjective:
The purpose of this experiment
is to compare the results with the
theoretical values given by a velocity
diagram and to study the variation in the
mechanical advantage as the angle of the
toggle bars changes.
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Roof truss
Objective:
Experimentally measure the forces in
a loaded frame and then compare them with
values calculated from theory.
Redundant truss
Objective:
To measure the forces in a trussbefore & after redundant member is present.
Fly wheel
Objective:
To determine the moment of inertia
of the fly wheel the friction and windage and
the time taken to come rest.
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Portal frame
Objective:
To analyses a given loading
arrangement on portal frames and
compares the results.
Cam & follower
Objective:
1. (a). performance of a tangent cam and roller follower.(b). comparison of a roller follower and lever roller follower on a tangent cam.
2. Comparison of a range of follower on an eccentric circular cam.3. (a). comparison of S.H.M and constant acceleration cams with a roller follower.
(b). study of uniform motion cam with a roller follower.
Force triangle
Objective:
1. To show that a system of co-planerforce when in equilibrium have aclosed vector diagram.
2. The resolution of forces and vectorforce diagram are often used in
engineering to find a solution may be
difficult or complex due to the
geometry involved.
Linear & Angular Speed
Objective:To verify the relationship between
angular and linear velocity.
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Funicular Polygon Of Forces
Objective:
1. To resolve by experiment any suitablecombination of three static, co-planer forces
and to compare the results with the graphical
solution obtained by drawing a triangle of
force diagram.
2. To study the equilibrium of more than threeconcurrent co-planer forces and the associated
polygon of forces.
3. To study of equilibrium of co-planer non-concurrent forces acting on a body.
Coefficient of Friction
Objective:
To determine the kinetic coefficient
of friction between various metal pairs.
Slider Crank Mechanism
Objective:
1. To obtain a graph of pistonvelocity against crank angle using
the method of instantaneous
centers assuming that the crank
rotates with constant angularvelocity.
2. To obtain the crank angles whichcorrespond to the maximum
piston velocity.
3. To show that for a slider crank chain the piston motion tends to simple harmonic motionwith increasing values of connecting rod\crank
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Crank And Slotted Link
Mechanism
Objective:
To investigate the kinematics
motion of a crank and slotted lever quickreturn mechanism and evaluate the
increase in efficiency that this would
offer if applied to a machine tool.