strength of material

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SOM2

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By: ezzatmonem (43 month(s) ago)

very good

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GROUP MEMBERS ARE1.A.R GOLO 09ME592.M.AZEEM 09ME603.NAZEER AHMEED 09ME35 4.A.SHAKOOR 09ME52 : 

GROUP MEMBERS ARE1.A.R GOLO 09ME592.M.AZEEM 09ME603.NAZEER AHMEED 09ME35 4.A.SHAKOOR 09ME52 START WITH THE NAME OF ALLAH

TOPICS OF OUR PRESENTATION : 

TOPICS OF OUR PRESENTATION TENSILE TEST IZOD TEST CHARPY TEST FATIGUE TEST

1.TENSILE TEST : 

1.TENSILE TEST Object: TO Conduct tensile test by using united testing machine Specimen: Mild steel

procedure : 

procedure 1.Measure the original length and diameter of specimen 2.Insert the specimen into grip of machine 3.Aplly load 4.Take reading as yield point approach 5.Continue test till fracture occurs

Images of united testing machine : 

Images of united testing machine

United testing machine : 

United testing machine

Izod test : 

Izod test Izod impact strength testing is an standard method of determining impact test specimen 75 mm length 2mm cut

procedure : 

procedure 1.Holld the specimen in impact tesing machine, in such a way as shown bellow 2.Bring hammer at top most position 3.Bring indicator 0

4.Realse the hammer : 

4.Realse the hammer 5.It will break the specimen then note the indicator reading

Images of izod testing machine : 

Images of izod testing machine

How to lock : 

How to lock

Charpy test : 

Charpy test What is charpy test? def: it is a standard high strain rate test which determine the amount of energy absorbed by material during fracture

The test is developed by scientist Georage charpy IN 1905 : 

The test is developed by scientist Georage charpy IN 1905 SPECIMEN 60 mm length

procedure : 

procedure This test is more common than izod test, specimen is placed on anvil procedure will be same difference will that specimen will be in horizontal position

Images of machine : 

Images of machine anvil

Fatigue test : 

Fatigue test What is fatigue? Def :the failure of material under varying loads, due to repeated loading. Specimen:

Procedure : 

Procedure Insert the specimen in the bearing housing of machine. Apply suitable load by adjusting jockey weight. Set revolving counter to zero. Start the motor and record no of revolution after which the specimen fails.

Image of fatigue testing machine. : 

Image of fatigue testing machine.

Why we perform these tests? : 

Why we perform these tests? We perform these tests for selection Of particular material to the product required to be manufactured

Applications of tensile test : 

Applications of tensile test If we have to check the axle of car that how much tension it can sustain Suppose if bike company giving order of manufacturing 500 shafts then we have to show by testing one piece by tensile method

History : 

History Use of these tests increased after 1879, after the failure of tay bridge in dec 28 1879, When a train was passing from it 70 peoples in train and hundred of workers died.

Tay bridge : 

Tay bridge

Examples : 

Examples

Examples : 

Examples Plan under different tests

Slide 25: 

THANKS