Abstract ( Exp 2 Mom Lab)
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Transcript of Abstract ( Exp 2 Mom Lab)
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7/25/2019 Abstract ( Exp 2 Mom Lab)
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ABSTRACT
This experiment is performed to understand the principle of torsion test
and also to determine the modulus of shear, G through measurement of
the applied torque and angle of twist. The variation of pure shear when a
structural member is twisted is called torsion. The torsional forces produce
a rotating motion about one end to another end of the member.
Two dierent specimens have been used in this experiment which is
Aluminium, specimen A and Brass, specimen B. The dimension for the
both specimen is measured and recorded before the experiment begin.
The torque measuring unit is calibrated rst b inspecting the read out
torque from amplier to be similar with the applied torque. The test is
then performed. To avoid some measurement errors several measure were
ta!en which can aect the results.
The test specimen is place between the loading device and the torque
measuring unit. The reading from the amplier is ta!en out each time
when the load is applied. The results were ta!en and some calculations is
performed using the formula given in the lab manual which is the applied
torque, angle of twist, number of revolutions and the percentage error and
from the results obtain a graph is plotted. The modulus can be determined
when the specimen is still wor!ing under the elastic limit.
Based on the results obtained, it is concluded that Aluminium, specimen A
is more ductile than Brass, specimen B. The G value for Brass theoreticall
is larger than Aluminium, hence it is harder to twist than Aluminium. The
torque needed to twist Brass to the same amount degree of rotation as
Aluminium is greater.
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MECHANICS AND MATERIALS LABORATORY (MEMB221)
SEMESTER 2, 2015/2016
EXPERIMENT 2 : TORSION TEST
DATE PERFORMED : 3rdDECEMBER 2015
DUE DATE : 10thDECEMBER 2015
SECTION : 05
GROUP : 04
GROUP MEMBERS I / D NUMBER
Mithradassa Nair A! G Dha"#dhara$ ME0%5512
S#r$a &ai'ash A! &a$$a$ &(r())a' ME0%55*%
Ra+,,$ A! Thi-a.(.#/a' ME0%552
Pra.at,sh &("ar A! Ash#) &("ar ME0%55
Sar+aisa$ A! M($ia$d- ME0%55*0
LAB INSTRUCTOR: Ci) N(ras'i$da Bi$ti A$(ar
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TABLE OF CONTENT
SUMMAR ABSTRACT 1
OBECTIE
TEOR
E6PERIMENT E7UIPMENT
PROCEDURE
DATA AND OBSERATIONS
ANA!SIS AND RESU!TS
DISCUSSIONS
CONC!USIONS
REFERENCES