# Report 1-Bar Elongation

Beirut Arab University
Faculty of Engineering- Debbieh Campus
CVLE321 – Construction Materials & Technology
Fall Semester 2017 - 2018
Report ( ---- )
Prepared By:
Name:Mahyoub S. Uweis
ID : 201500410
Instructor’s Use Only : Grade :
/10
Instructor’s comment :
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Homework Guidelines
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The homework must be neat and clear.
Write the question number clearly at the start and trace a line at the end of each one.
The homework will not be accepted without this cover page
The homework must be stapled together all they will be canceled.
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Elongation of a Steel Bar
Purpose of the experiment: to know the yield
strength, ultimate strength, elongation and reduction
of cross-sectional area, modulus of elasticity (Es) of a
steel bar.
Apparatus used:
_steel bar marked on every 5cm
_tape meter
_elongation machine with all its measurements
Procedure:
_ Measure the length of the steel bar before
elongation
_Put the bar in the elongation machine and start
taking readings from the machine, at first take the
reading of the yield strength (Py) then the ultimate
strength (Pu).
_Then do the suitable calculations to know the
modulus of elasticity
Calculations:
σy=fy=Py/A
σu=fu=Pu/A
strain= ΔL/L
1
% elongation= ΔL/L x 100
2

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