Hafizawati Zakaria
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Hafizawati Zakaria
Official Name
Hafizawati, Zakaria
Alternative Name
Zakaria, H.
Zakaria, Hafizawati
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Scopus Author ID
36245729000

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  • Publication
    Effect of kenaf fiber loading on the tensile properties of 3D printing PLA filament
    ( 2023-01-01)
    Lau H.Y.
    ;
    Mohd Sabri Hussin
    ;
    Sanusi Hamat
    ;
    Muhamad Saifuldin Abdul Manan
    ;
    Ibrahim M.
    ;
    Hafizawati Zakaria
    As know Polylactic acid (PLA) is a popular and widely used thermoplastic material used in fused filament fabrication (FDM) due to its biodegradability and biocompatibility. As PLA was identified as a brittle material, reinforcement was used to enhance the properties of the PLA. This paper aims to study the effect of using various kenaf volume ratios on the tensile properties of the 2003D PLA filament for 3D printing. The study began by extruding 2003D grade PLA pellet from Ingeo NatureWorks into a single filament extruder machine with an extrusion temperature of 190 °C and a screw rate of 7 rpm. The 90° raster angle of line infill pattern with 100 % infill density were used for the 3D printing specimens. Mechanical test standards such as ASTM D638, was used for tensile testing to analyse the quality of the extruded PLA single filament. As result, the with kenaf fibre loading of 15 % shows the optimum tensile properties among the filler loading, hence it is proven that the tensile properties of the was indeed being enhanced by the additional of the kenaf fibre as reinforcement.
      1
  • Publication
    The behavior of Projectile Ricochet off various wooden targets
    ( 2006)
    Mohd Shukry Abdul Majid
    ;
    Robert S. Birch
    ;
    M.I. Jais
    ;
    Mohd Noor Arib Md Rejab
    ;
    Hafizawati Zakaria
    This paper details the assessment of bullet ricochet as a function of incident angle and the impact plate material. A series of experimental testing have been carried out on three different woods chosen to give range of hardness, ranked from the hardest to softest. Each wood was fired upon varying angles of incidence until ricochet was observed. The tests were conducted in an indoor short range using a standard 0.22 calibre bolt-action rifle. In general, the ricochet angle was found to increase with an increase in angle of incidence but decrease with an increase target hardness.
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