Z Score,T Score, Percential Rank and Box Plot Graph
Group 3 presentation KM4583
1. DETERMINE THE MECHANICAL
PROPERTIES OF GLASS FIBRE
COMPOSITES BASED ON DIFFERENT
VOLUME COMPOSITION
GROUP 3
MUHAMMAD SYAFIQ BIN MEGT JIWA
A133083
AHMAD ASYBILLAH BIN AZNAN
A133068
ABDUL MALEK BIN ABDUL SHUKUR
A133490
KHOR SU SENG
A134084
2. OBJECTIVE
Determine the tensile strength of glass
fibre composites with 35/65, 45/55 and
55/45 volume composition
Determine the beast fibre glass
composition
5. MATERIAL DENSITY
Fiberglass ( woven ) = 2.5g/cm
Polyester = 1.4g/cm
Butanox M50 = 1.48g/cm
Ratio of Polyester with Butanox = 100:2
(provided on the bottle)
8. PREPARING THE SPECIMEN
All the materials and
apparatus needed as listed
above are prepared.
The fibre glass (woven
rovin) is cut to 10.0cm ×
10.0cm size. (3 pieces is
prepared).
Polyester and Butanox M50 each is prepared in a
container. 55/45 volume
composition of fiber glass
composite is used.
Fibre glass (woven rovin)
10.0cm x 10.0cm
9. The silicon wax is spread inside the mould
and it is used as the releasing agent.
The polyester with hardener is mixed inside a
container. The ratio of polyester to Butanox
M-50 used in preparing this matrix is 50:1.
The resin mixture is poured into the mould
slowly and all the resin mixture spread
evenly.
Silicon wax is spread
Mixture of polyester and Butanox M-50 is spread
10. The first layer of fibre glass material is
placed.
The resin mixture is poured again inside
the mould on the first layer of the fibre
glass.
Step 6 to 8 is repeated until the third layer
of fibre glass is layup.
First fibre glass layer is layup with resin mixture spread on it
11. The mould temperature is set to 170 degree
Celsius. (2 of 3 of the melting point
temperature of polyester).
The mould is placed on the platform inside
the compression moulding machine.
The lever is pulled up to compress the mould.
The mould is compressed up to 50 Bar.
The mould is left inside the compression
moulding for 15 minutes.
12. The mould is taken out - 15 minutes.
The hot mould cooled down – cool down the
temperature of the mould.
After that, the mould is opened and the
specimen is taken out.
The next two specimen for volume fraction of
45/55 and 35/65 is prepared.
Repeat step 2 - 17 for next two compositions.
13. TENSILE TEST METHODOLOGY
All 3 specimens are cut into dumb bell shape as
shown in figure. Each specimen is cut to 3 pieces.
The tensile test is carried out by using Universal
Testing Machine – Zwick Roell.
Strain rate : 1mm/min
14.
Vernier calliper is used to measure the
thickness and width of the dumbbell shape
specimen.
15.
The specimen is clamped and
all related dimensions are
inserted into the computer
software for tensile test.
The pre load is set to 3N so
that the specimen can be grip
firmly.
Once the specimen is broken,
all the data values are
recorded and the graph for
applied stress over strain is
saved. After that, the
specimen is taken off.
Step 2 - 4 is repeated for next
specimen.
19. Based on 3 volume composition
Differ value tensile stress for each
The highest average 45/55 volume
composition
Strength of composite is depends on
optimum composition fiber and matrix
20. CONCLUSION
Average Young modulus for glass fibre reinforced
polyester for volume composition of 55/45 is
7053.33 MPa.
Average Young modulus for glass fiber reinforced
polyester for volume composition of 45/55 is
9893.33 MPa.
Average Young modulus for glass fiber reinforced
polyester for volume composition of 35/65 is 8150
MPa.
The compostion of matrix and fiber determine the
properties of the compostion. The optimum
composition of matrix and fiber always provide the
highest mechanical properties.
