Department of Material Science and Engineering

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Browsing Department of Material Science and Engineering by Author "Danyuo, Yiporo"

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    Effect of Chemically Modified Banana Fibers on the Mechanical Properties of Poly-Dimethyl-Siloxane-Based Composites
    (Journal of Materials and Engineering Structures, 2019-05-18) Danyuo, Yiporo; Zakariyyah, Taiwao; Nasiru, Suleman; Mustapha, Kabiru; Azeko, Tahiru S.; Bello, Sefiu A.; Abade-Abugre, Miriam; Yirijor, John; Anyidoho, Victor; McBAGONLURI, Fred
    The study presents the mechanical properties of polymer-based composites reinforced with chemically modified banana fibers, by alkalization in different concentrations of sodium hydroxide (NaOH). The fiber weight fraction has a great effect on the mechanical properties of the composites. Stiff composites were obtained at 6 wt% fiber fractions with Young’s modulus of 254.00 ±12.70 MPa. Moreover, the yield strength was 35.70 ±1.79 MPa at 6 wt% fiber fractions. However, the ultimate tensile strength (UTS) and toughness of the composites were obtained at 5 wt% fiber fractions. Statistical analyses were used to ascertain the significant different on the mechanical properties of the fibers and composites. The implication of the results is then discussed for potential applications of PDMS-based composites reinforced with chemically modified banana fibers.
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    Strength and fracture resistance of cellulose fiber reinforced cement composite
    (2022-07-26) Mustapha, Kabiru; Sogoye, Michael; Abdulraman, Sikiru Ottan; Danyuo, Yiporo; Tahiru, Azeko Salifu; Annan, Ebenezer
    This study presents the production and experimental assessment of the strengths and fracture resistance of cellulose fiber-reinforced cementitious composite material. The composite, which consists of mixture of recycled fibers obtained from waste carton boxes, was stabilized with measured level of Ordinary Portland Cement. The effects of constituent’s composition on compressive strength, flexural strength and fracture toughness were elucidated. Compressive strengths and flexural strengths were measured using uniaxial compressive and three-point bend loading conditions respectively while a single edge notch bend test (SENB) condition was employed for the fracture toughness measurement. The results obtained from experiments showed that the composite properties are significantly improved by the fiber reinforcement with optimum properties obtained at fiber composition of 5wt. % with compressive strength of 24.4 MPa, flexural strength of 8.0 MPa and fracture toughness of 1.36 MPa√m. The results were discussed for possible applications of robust cellulose fiber reinforced cement composite materials suitable for interior structural applications and to provide potential opportunities for waste management and/or recycling of carton boxes and other related wastes.
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    Uniaxial tensile response of coconut coir fiber-reinforced polyethylene Composites
    (2019) Mustapha, Kabiru; Bello, Sefiu Adekunle; Danyuo, Yiporo; Oshifowora, Tobi
    The roles of Composite materials in a variety of engineering applications have increased due to their enhanced strength and modulus, especially polymer-based composites which is one of the commercially available composites. The uniaxial tensile properties of polyethylene matrix reinforced with coconut coir fibers has been studied and the results from experiments and analytical models are presented. The compositional dependence of tensile strength, stiffness (elastic modulus), modulus of resilience and ductility are explored for different proportions of the constituent materials through experiments and analytical models. The results from experiments showed that the properties measured were greatly affected by the fiber mass fraction with optimized properties obtained at fiber content of 10 wt%.