Document Details

Document Type : Thesis 
Document Title :
Monotonic and Fatigue Testing of Natural Fibers Reinforced Plastic Composite Materials
إختبارات تحمل وإجهاد لمواد مركبة من لدائن و ألياف طبيعية
 
Subject : Faculty of Engineering - Department of Aeronautical Engineering 
Document Language : Arabic 
Abstract : Current environmental requirements are making many companies and researchers develop new materials with attractive features such as renewability and biodegradability that can replace currently used polymer fibers (e.g. glass fibers). Therefore, Natural fibers are great alternative because they are readily available in fibrous form. Sisal and Jute fibers are typical types of natural fibers. They are extracted from their respective plants which grow abundantly and wildly in the environment. Also, it can resist prolonged high temperatures like drought conditions. In this study, cross ply unidirectional sisal fibers reinforced polyester based resin bio-composite (SFRP) specimens and woven fabric jute fibers reinforced polyester based resin bio-composite (JFRP) specimens are manufactured using hand-layup molding technique and then characterized in terms of their tensile strength and fatigue life behavior. In addition, the JFRP are characterized in term of torsional and multi-axial strengths and multi-axial fatigue life behavior. Static tests results showed that the ultimate tensile strength is found to be around 47 MPa for SFRP and 42 MPa for JFRP. Displacement controlled and constant amplitude fatigue tests are then carried out at three levels of the ultimate displacements with frequency of 5Hz. The fatigue tests results are extensively analyzed using stiffness degradation behavior, S/N curve diagrams, hysteresis loops and energy dissipation versus number of cycles. The fatigue endurance limit (over one million cycles) is achieved at a stress level of 55% for the SFRP and 65% for the JFRP with respect to their ultimate displacements. The same endurance level of the JFRP was achieved under multi-axial fatigue loading. The implication of this work is that the use of these materials in areas such as car interiors promises to reduce weight, cost and carbon footprints significantly without sacrificing performance. 
Supervisor : Dr. Mostefa Bourchak 
Thesis Type : Master Thesis 
Publishing Year : 1434 AH
2013 AD 
Added Date : Wednesday, November 20, 2013 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
يوسف أحمد دوبحDobah, Yousef AhmedResearcherMaster 

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