Expt 7 - Tesion Test
Expt 7 - Tesion Test
Expt 7 - Tesion Test
T E NS IO N T E S T
EXPERIMENT NO.7
BATCH: A8
07010042-07010046
TENSION TEST
EXPERIME NT NO. 7
AIM
A PPA R A TU S
WORKI NG FORM UL AE
σ = F/A
Y = σ/ε
Where,
F Load applied on specimen (N)
A Area of cross-section (m2)
σ Stress (Pa)
ε Strain
Y Young’s Modulus of Elasticity (ratio of stress and strain in the linear region)
2
SPECIMEN DIAGRAMS
OBSERVATI ON
Aluminium Specimen :-
Gauge length (average) = 101 mm
Total length (average) = 200 mm
Sl.No 1 2 3
3
Table 7.2:- ( Stress and Strain values of Aluminium specimen)
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Table 7.3:- ( Diameter )
Sl.No 1 2 3
5
G R A PH S
140
120
100
80
60
40
20
Stress
0
0 5 10 15 20 25 30 35 40 45
Graph for Aluminium
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C A L C U LA TI O N S
Aluminium:-
For yield stress :-
F = 8910 N
A = 38.465 10-6 m2
Y=F/A=231.64 106 Pa
F = 9710 N
A = 38.465 10-6 m2
Y=F/A=252.43 106 Pa
From graph :-
Value of Young’s Modulus of Elasticity = slope of the graph = 79.32 GPa
Mild Steel :-
F = 23,300 N
A = 38.355 10-6 m2
Y=F/A=607.48 106 Pa
F = 26,400 N
A = 38.355 10-6 m2
Y=F/A=688.31 106 Pa
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For percentage elongation:-
From graph :-
Value of Young’s Modulus of Elasticity = slope of the graph = 196.19 GPa
I N FE R E NC E
The obtained values of Moduli of Elasticity of Aluminium and Mild Steel are found to be in close
agreement with standard values.
SO U RC E S O F ER ROR
1. There is slight difference while taking down the readings from the Universal Testing Machine
and the actual reading, hence the graph is not truly linear.
2. There is experimental error due to the rapidly increasing values of load (F).
3. The material might have internal defects or imperfections that could lead to botched results.
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D E TA I L S O F STU D EN TS
Table 7.5
07010045 J G M V Pramod