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Group 3 presentation KM4583

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Group 3 presentation KM4583

  1. 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. 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 
  3. 3. APPARATUS Zwick Roell - Universal Tensile Machine  Compression moulding Machine  Gloves  Clamp  Meter Ruler  Vernier calliper  Syringe  Scissors 
  4. 4. MATERIAL Polyester  Butanox M50  Fiberglass  Example of fiber glass application in real life
  5. 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)
  6. 6. MATERIAL COMPOSITION  35/65 (35% Fibre, 65% Matrix) - Vf = 1.32cm^3 Vm = 2.45cm^3  45/55 (45% Fibre, 55% Matrix) - Vf = 1.32cm^3 Vm = 1.61cm^3  55/45 (55% Fibre, 45% Matrix) -Vf = 1.32cm^3 Vm = 1.08cm^3
  7. 7. METHODOLOGY OF PREPARING THE SPECIMEN Fiber glass (woven rovin) Polyester resin Butanox M-50 (hardener)
  8. 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. 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. 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. 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. 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. 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. 14.  Vernier calliper is used to measure the thickness and width of the dumbbell shape specimen.
  15. 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.
  16. 16. RESULTS & DISCUSSION  Volume composition 55/45 Maximum Maximum Young’s Tensile Tensile modulus Stress Strain (Mpa) (Mpa) (Mpa) Specimen 1 46.1 0.9 7110 Specimen 2 33.3 0.8 6770 Specimen 3 31.9 0.8 7280
  17. 17.  Volume composition 45/55 Maximum Maximum Young’s Tensile Stress Tensile Strain modulus (MPa) (MPa) (MPa) Specimen 1 16.3 1.0 11400 Specimen 2 57.5 0.8 8500 Specimen 3 79.2 1.1 9780
  18. 18.  Volume composition 35/65 Maximum Maximum Young’s Tensile Stress Tensile Strain modulus (MPa) (MPa) (MPa) Specimen 1 57.8 0.9 8020 Specimen 2 60.0 1.0 8080 Specimen 3 57.5 0.8 8350
  19. 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. 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.

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