engg mechanics lab

8/3/2019 Engg Mechanics Lab

1/9

Department of Mechanical EngineeringUniversity of Engineering & Technology Lahore(KSK Campus).

(Statics & dynamics) LAB DATA

Lab Incharge: Engr. Muhammad AmjadLab Assistant: Abbas Ali


2/9

Lay-Out of Engineering Mechanics Lab

31

White BoardDOOR # 1 DOOR # 2

1

2 3

4

5 6

24 25

23

22 21

9

10 11

12 13

14 15

29

28

27

26

32

30

1716 18 19 20


3/9

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


4/9

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.


5/9

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.


6/9

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.


7/9

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


8/9


9/9

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.

engg mechanics lab

Documents