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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Main Author: Kalam, Anizah
Format: Thesis
Language:English
English
Published: 2003
Subjects:
Online Access:http://psasir.upm.edu.my/id/eprint/12144/1/FK_2003_3.pdf
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author Kalam, Anizah
author_facet Kalam, Anizah
author_sort Kalam, Anizah
collection UPM
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.
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spelling upm.eprints-121442024-07-02T06:18:10Z http://psasir.upm.edu.my/id/eprint/12144/ Fatigue Behaviour Of Oil Palm Fruit Bunch Fibre/Epoxy And Carbon Fibre/Epoxy Composites 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. 2003-04 Thesis NonPeerReviewed text en http://psasir.upm.edu.my/id/eprint/12144/1/FK_2003_3.pdf Kalam, Anizah (2003) Fatigue Behaviour Of Oil Palm Fruit Bunch Fibre/Epoxy And Carbon Fibre/Epoxy Composites. Masters thesis, Universiti Putra Malaysia. Fatigue English
spellingShingle Fatigue
Kalam, Anizah
Fatigue Behaviour Of Oil Palm Fruit Bunch Fibre/Epoxy And Carbon Fibre/Epoxy Composites
title 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_short 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
topic Fatigue
url http://psasir.upm.edu.my/id/eprint/12144/1/FK_2003_3.pdf
work_keys_str_mv AT kalamanizah fatiguebehaviourofoilpalmfruitbunchfibreepoxyandcarbonfibreepoxycomposites