Fatigue Behaviour Of Oil Palm Fruit Bunch Fibre/Epoxy And Carbon Fibre/Epoxy Composites
Tensile test on unidirectional Oil Palm Fruit Bunch (OPFB) fibre/epoxy composite and unidirectional Carbon Fibre (CF)/epoxy composite were conducted to determine their ultimate tensile stress, the Young's modulus and elongation at fracture Two different fibre volume fractions of 35'1&qu...
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my-upm-ir.121442024-07-02T06:18:10Z Fatigue Behaviour Of Oil Palm Fruit Bunch Fibre/Epoxy And Carbon Fibre/Epoxy Composites 2003-04 Kalam, Anizah Tensile test on unidirectional Oil Palm Fruit Bunch (OPFB) fibre/epoxy composite and unidirectional Carbon Fibre (CF)/epoxy composite were conducted to determine their ultimate tensile stress, the Young's modulus and elongation at fracture Two different fibre volume fractions of 35'1"0 and 55% were studied in OPFB fibre/epoxy composite. The fibre volume fraction of CF/epoxy composite studied was 42%. The ultimate tensile stress determined from the tensile tests were then used to determine the maximum stress levels, Smax of fatigue tests for CF and OPFB fibre/epoxy composites. Two parameters were studied in fatigue test, which were stress ratio, R (0.1 and 0.5) and fibre volume fraction, Vr (35% and 55%). All Fatigue tests were performed at constant stress amplitude, at an air-conditioned room temperature of 20°C and at a frequency of 20 Hz. Observation on fractured surface of tensile and fatigue tested specimens were also done.The ultimate tensile stress of CF/epoxy composite is 247.0 MPa. OPFB fibre/epoxy composite with fibre volume fraction of 35% and 55% have ultimate tensile stress of 47.8 MPa and 46.1 Mpa, respectively. The observation on fractured surface of tensile tested specimens showed that CF and OPFB fibre/epoxy composites failed in a brittle manner. Fatigue behaviour of CF/epoxy composite shows a reduction in fatigue resistance with decreasing stress ratio. Three specimens survived 1 million cycles, which were cycled at stress ratio of 0.1 and maximum stress leveL Smax of 0.65. There was no indication of fatigue limit shown by S-N curves for OPFB fibre/epoxy composite for both fibre volume fractions. However the S-N curves of OPFB fibre/epoxy composite showed a decrease of fatigue resistance with the increase of fibre volume fraction from 35% to 55%. Two types of fractured surface were observed on the CF/epoxy composite failed in fatigue test, which were brittle and delamination. Meanwhile the fractured surface of OPFB fibre/epoxy composite showed brittle, delamination and fibre pull-out. Fatigue 2003-04 Thesis http://psasir.upm.edu.my/id/eprint/12144/ http://psasir.upm.edu.my/id/eprint/12144/1/FK_2003_3.pdf text en public masters Universiti Putra Malaysia Fatigue Faculty of Engineering Sahari, Barkawi English |
| institution |
Universiti Putra Malaysia |
| collection |
PSAS Institutional Repository |
| language |
English English |
| advisor |
Sahari, Barkawi |
| topic |
Fatigue |
| spellingShingle |
Fatigue Kalam, Anizah Fatigue Behaviour Of Oil Palm Fruit Bunch Fibre/Epoxy And Carbon Fibre/Epoxy Composites |
| description |
Tensile test on unidirectional Oil Palm Fruit Bunch (OPFB) fibre/epoxy composite
and unidirectional Carbon Fibre (CF)/epoxy composite were conducted to determine
their ultimate tensile stress, the Young's modulus and elongation at fracture Two
different fibre volume fractions of 35'1"0 and 55% were studied in OPFB fibre/epoxy
composite. The fibre volume fraction of CF/epoxy composite studied was 42%.
The ultimate tensile stress determined from the tensile tests were then used to
determine the maximum stress levels, Smax of fatigue tests for CF and OPFB
fibre/epoxy composites.
Two parameters were studied in fatigue test, which were stress ratio, R (0.1 and 0.5)
and fibre volume fraction, Vr (35% and 55%). All Fatigue tests were performed at
constant stress amplitude, at an air-conditioned room temperature of 20°C and at a
frequency of 20 Hz. Observation on fractured surface of tensile and fatigue tested
specimens were also done.The ultimate tensile stress of CF/epoxy composite is 247.0 MPa. OPFB fibre/epoxy
composite with fibre volume fraction of 35% and 55% have ultimate tensile stress of
47.8 MPa and 46.1 Mpa, respectively.
The observation on fractured surface of tensile tested specimens showed that CF and
OPFB fibre/epoxy composites failed in a brittle manner. Fatigue behaviour of
CF/epoxy composite shows a reduction in fatigue resistance with decreasing stress
ratio. Three specimens survived 1 million cycles, which were cycled at stress ratio
of 0.1 and maximum stress leveL Smax of 0.65. There was no indication of fatigue
limit shown by S-N curves for OPFB fibre/epoxy composite for both fibre volume
fractions. However the S-N curves of OPFB fibre/epoxy composite showed a
decrease of fatigue resistance with the increase of fibre volume fraction from 35% to
55%.
Two types of fractured surface were observed on the CF/epoxy composite failed in
fatigue test, which were brittle and delamination. Meanwhile the fractured surface
of OPFB fibre/epoxy composite showed brittle, delamination and fibre pull-out. |
| format |
Thesis |
| qualification_level |
Master's degree |
| author |
Kalam, Anizah |
| author_facet |
Kalam, Anizah |
| author_sort |
Kalam, Anizah |
| title |
Fatigue Behaviour Of Oil Palm Fruit Bunch Fibre/Epoxy And Carbon Fibre/Epoxy Composites |
| title_short |
Fatigue Behaviour Of Oil Palm Fruit Bunch Fibre/Epoxy And Carbon Fibre/Epoxy Composites |
| title_full |
Fatigue Behaviour Of Oil Palm Fruit Bunch Fibre/Epoxy And Carbon Fibre/Epoxy Composites |
| title_fullStr |
Fatigue Behaviour Of Oil Palm Fruit Bunch Fibre/Epoxy And Carbon Fibre/Epoxy Composites |
| title_full_unstemmed |
Fatigue Behaviour Of Oil Palm Fruit Bunch Fibre/Epoxy And Carbon Fibre/Epoxy Composites |
| title_sort |
fatigue behaviour of oil palm fruit bunch fibre/epoxy and carbon fibre/epoxy composites |
| granting_institution |
Universiti Putra Malaysia |
| granting_department |
Faculty of Engineering |
| publishDate |
2003 |
| url |
http://psasir.upm.edu.my/id/eprint/12144/1/FK_2003_3.pdf |
| _version_ |
1804888687569272832 |