Department Of Civil EngineeringGH Raisoni College

Topics: Materials science, Tensile strength, Charpy impact test Pages: 45 (6600 words) Published: November 16, 2014
Department of Civil Engineering

G.H. Raisoni College of Engineering
Hingna Road, Digdoh Hills, Nagpur – 16

Laboratory Manual
THIRD SEMESTER B.E. CIVIL
STRENGTH OF MATERIALS

DEPARTMENT
OF
CIVIL ENGINEERING

Strength Of Materials

Department of Civil Engineering

STRENGTH OF MATERIALS
List of Practical
1)

To Study The Universal Testing Machine (U.T.M.)

2)

To determine Tensile test on a metal.

3)

To determine Hardness of Mild Steel.

4)

Torsion test on mild steel rod.

5)

To determine Impact strength of steel. (By Izod test )

6)

To determine Impact strength of steel.( By Charpy test)

7)

To determined Young’s Modulus of Elasticity of different materials of beam simply supported at ends.

8)

To determined Shear Test on Metals.

9)

To determine the Stiffness of the Spring and Modulus of Rigidity of the Spring wire

10)

To Study various types of Strain Gauges.

11)

To determine Compressive Strength Of Brick.

Strength Of Materials

Department of Civil Engineering

EXPERIMENT NO. – 01
AIM: -

Study of Universal Testing Machine (U.T.M.)

OBJECT: - To Study the various component parts of the Universal Testing Machine (U.T.M.) & test procedures of various practical’s to be performed. APPARATUS: - Universal Testing Machine with all attachment i.e. shears test attachment, bending attachment, tension grips, compression test attachment etc.

DIAGRAM:-

Strength Of Materials

Department of Civil Engineering

THEORY : - The Universal Testing Machine consists of two units. 1) Loading unit, 2) Control panel.
LOADING UNIT:It consists of main hydraulic cylinder with robust base inside. The piston which moves up and down. The chain driven by electric motor which is fitted on left hand side. The screw column maintained in the base can be rotated using above arrangement of chain. Each column passes through the main nut which is fitted in the lower cross head.

The lower table connected to main piston through a ball & the ball seat is joined to ensure axial loading. There is a connection between lower table and upper head assembly that moves up and down with main piston. The measurement of this assembly is carried out by number of bearings which slides over the columns.

The test specimen each fixed in the job is known as ‘Jack Job’. To fix up the specimen tightly, the movement of jack job is achieved helically by handle. CONTROL PANEL:It consists of oil tank having a hydraulic oil level sight glass for checking the oil level. The pump is displacement type piston pump having free plungers those ensure for continuation of high pressure. The pump is fixed to the tank from bottom. The suction & delivery valve are fitted to the pump near tank Electric motor driven the pump is mounted on four studs which is fitted on the right side of the tank. There is an arrangement for loosing or tightening of the valve. The four valves on control panel control the oil stroke in the hydraulic system. The loading system works as described below.

The return valve is close, oil delivered by the pump through the flow control valves to the cylinder & the piston goes up. Pressure starts developing & either the specimen breaks or the load having maximum value is controlled with the base dynameters consisting in a cylinder in which the piston reciprocates. The switches have upper and lower push at the control panel for the downward & upward movement of the movable head. The on & off switch provided on the control panel & the pilot lamp shows the transmission of main supply.

METHOD OF TESTING:Initial Adjustment: - before testing adjust the pendulum with respect to capacity of the test i.e. 8 Tones; 10 Tones; 20 Tones; 40 Tones etc. For ex: - A specimen of 6 tones capacity gives more accurate result of 10 Tones capacity range instead of 20 Tones capacity range. These ranges of capacity are adjusted on the dial with the help of range selector knob. The Strength Of Materials...
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