TY  - BOOK
AU  - Rofii Ridhwan Bin Mohammad
AU  - 
ED  - Universiti Teknologi Brunei
TI  - Investigation of Performance Of Hybrid Composite Aluminium-Shaft Under Torsion
PY  - 2020///
CY  - Bandar Seri Begawan
PB  - Universiti Teknologi Brunei
KW  - Universiti Teknologi Brunei
KW  - Dissertations
KW  - Thesis writing
KW  - Aluminum alloys
KW  - Mechanical properties
N1  - A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science (MSc) in Mechanical Engineering Programme Area of Universiti Teknologi Brunei; ABSTRACT
In the modern civilization, the humankind uses various tools and machines in helping them in doing their daily tasks. These tools and machines consist of various components and parts, that are made from various materials. In other words, these materials and components are subjected to various loads while in operation, such as tension, compression, torsion and many more. A custom test rig was designed and fabricated which was used for conducting the torsion test by utilizing an Instron tensile machine to apply said torsional load. Various materials are used for fabricating these components, in recent times, composite materials have become more prevalent. For this research, torsion test was conducted on solid shafts made from aluminum, composite, and aluminum- composite materials, where its performance will be determined as it is under torsional load. Solid shafts with a gauge length of 50 mm and diameter of 7 mm was fabricated using hand lay-up method, in accordance to prior literature and ASTM E143-13 standard. Glass and jute/ epoxy materials were used in this investigation. The research managed to design the fixture test rig with its parameters and materials. The materials used to fabricate the shafts, are aluminum, jute and glass/epoxy in both woven and CSM form. The research managed to conduct torsion test on several shaft specimen by utilizing an Instron tensile machine to apply the desired load at a predetermined rate. With an approximate percentage error between readings of similar specimen of 6.67%, this suggests that the test rig can generate consistent readings on torsion tests. The research constructed several relations in a series of graphs which considered the relation between load-angle of twist, shear stress-shear strain and torque-angle of twist. The various influence of composite material on the hybrid specimen was drawn and compared. Results shows that the maximum torque obtained for Al-woven glass/epoxy shaft was found to be higher than Al-jute/epoxy and Al-CSM glass/epoxy. Hybrid-woven glass/epoxy has a maximum shear stress that is 23% higher than aluminum, 83% higher than woven glass/epoxy, 89% higher than CSM glass/epoxy, 93% higher than jute/epoxy, 22% higher than Al-CSM glass/epoxy and 73% higher than Al-jute/epoxy. This suggests that Al-woven glass/epoxy is the strongest in withstanding torsional prior to failure. The failure mode of each specimen had also been discussed by observing the state of the specimen after the torsion test. For aluminum specimen, only striations and shearing on the surfaces was observed. For composite materials, shear failure and delamination were the main factor for failure which was affected by matrix failure and fiber failure. The hybrid specimen failed via a shear failure and delamination between the fiber composites; Thesis (Degree) - Universiti Teknologi Brunei, 2020; Includes bibliographical references 51-54
ER  -