Syamir Alihan Showkat Ali
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Syamir Alihan Showkat Ali
Official Name
Syamir Alihan, Showkat Ali
Alternative Name
Alihan Showkat Ali, Syamir
Showkat Ali, Syamir A.
Ali, Syamir Alihan Showkat
Showkat Ali, S.A
Showkat Ali, Syainir Alihan
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Scopus Author ID
57190746528

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  • Publication
    The Effects of Self-Polymerized Polydopamine Coating on Mechanical Properties of Polylactic Acid (PLA)–Kenaf Fiber (KF) in Fused Deposition Modeling (FDM)
    ( 2023-06-01)
    Sanusi Hamat
    ;
    Syamir Alihan Showkat Ali
    ;
    Salit M.S.
    ;
    Yidris N.
    ;
    Showkat Ali S.A.
    ;
    Mohd Sabri Hussin
    ;
    Muhamad Saifuldin Abdul Manan
    ;
    Muhamad Qauyum Zawawi Ahamad Suffin
    ;
    Maliki Ibrahim
    ;
    Ahmad Nabil Mohd Khalil
    This research examines the impact of self-polymerized polydopamine (PDA) coating on the mechanical properties and microstructural behavior of polylactic acid (PLA)/kenaf fiber (KF) composites in fused deposition modeling (FDM). A biodegradable FDM model of natural fiber-reinforced composite (NFRC) filaments, coated with dopamine and reinforced with 5 to 20 wt.% bast kenaf fibers, was developed for 3D printing applications. Tensile, compression, and flexural test specimens were 3D printed, and the influence of kenaf fiber content on their mechanical properties was assessed. A comprehensive characterization of the blended pellets and printed composite materials was performed, encompassing chemical, physical, and microscopic analyses. The results demonstrate that the self-polymerized polydopamine coating acted as a coupling agent, enhancing the interfacial adhesion between kenaf fibers and the PLA matrix and leading to improved mechanical properties. An increase in density and porosity was observed in the FDM specimens of the PLA–PDA–KF composites, proportional to their kenaf fiber content. The enhanced bonding between kenaf fiber particles and the PLA matrix contributed to an increase of up to 13.4% for tensile and 15.3% for flexural in the Young’s modulus of PLA–PDA–KF composites and an increase of up to 30% in compressive stress. The incorporation of polydopamine as a coupling agent in the FDM filament composite led to an improvement in tensile, compressive, and flexural stresses and strain at break, surpassing that of pure PLA, while the reinforcement provided by kenaf fibers was enhanced more by delayed crack growth, resulting in a higher strain at break. The self-polymerized polydopamine coatings exhibit remarkable mechanical properties, suggesting their potential as a sustainable material for diverse applications in FDM.
      2
  • Publication
    Effects on Ply Orientation of Kevlar/Epoxy for Ballistic Impact in Bulletproof Vest Using Non-linear Finite Element Analysis
    ( 2021-01-01)
    Sanusi Hamat
    ;
    Mohd Sabri Hussin
    ;
    Syamir Alihan Showkat Ali
    ;
    Maliki Ibrahim
    The bulletproof vest is vital equipment to stop bullets from penetrating the body. The vest comes with a ballistic panel that can absorb the energy from the ballistic impact. Due to excellent impact resistance and high strength-to-weight ratio, Kevlar fibers composites are widely used for designing a ballistic panel in bulletproof vest body armor to avoid penetration. In this study, the research aims to investigate the ballistic impact behavior on a ballistic panel of Kevlar/Epoxy by using different fibers ply orientation to increase the ballistic impact performance. A finite element analysis using non-linear dynamic simulation was developed in commercial software Abaqus/Explicit to analyze the performance of impact characteristics in penetration depth, damage criteria, and energy-absorbing capacity. The simulation results show that the fibers ply orientation sequence of [0/90/0/90]2sym with 4 mm panel thickness has produced the highest energy absorption of 1523.7 J with least depth penetration of 2.12 mm for the 9 mm bullet traveling at 358 m/s and produce a lowest Hashin’s damage criteria with the value of 0.40. The finding shows that the ply orientation of Kevlar/Epoxy composite ballistic panel has excellent potential in bulletproof body armor application for minimizing the effect of blunt force trauma with less expensive materials usage and light weight ballistic panel.
      1
  • Publication
    Design and Mechanical Analysis on a Compact Bicycle Loader for a Small Cubic Centimeter Motorcycle
    ( 2021-01-01)
    Mohd Sabri Hussin
    ;
    Sanusi Hamat
    ;
    Syamir Alihan Showkat Ali
    This paper presents the finite element and fluid-flow analysis on the behavior of a new compact bicycle loader design used for a small cubic centimeter motorcycle. The bicycle loader in the current market comes with various sizes and design which mostly applicable to the large-scale vehicles, namely car and motorcycle with higher cubic centimeter engines. The study aims to design a new compact bicycle loader specifically for small cubic centimeter motorcycles with greater loading capability and security. The finite element analysis was performed using the ABAQUS and ANSYS software to better understand the static and dynamic response of the bicycle loader relating to static and fatigue strengths with specific loads. The fluid-flow to structure analysis has also been carried out using the XFlow Computational Fluid Dynamic software to demonstrate the flow behavior and effect on the bicycle loader with different motorcycle speed. The fatigue analysis was carried out to analyze the structural performance of the bicycle loader. Factors like fatigue life, safety factor, biaxiality indication and fatigue response are plotted for the bicycle loader and the fatigue performance is predicted using the data obtained. The results of the stress distribution show that the maximum von-Mises stress obtained from is about 31.7 MPa, well within the yield strength if the mild steel material. The results show that the highest stress distribution occurs at the mounting part of the bicycle loader, with equivalent stress of 50.29 MPa. The results show that there are no permanent deformations occurred in the bicycle loader during the fatigue test and fulfils the minimum safety requirements needed. The fluid flow analysis show that a strong recirculation region occurs at the front of the motorcycle, bicycle headset and suspension fork and downstream of the bicycle tires, however, no obvious flow disturbance is observed in the vicinity of the bicycle loader.
      1
  • Publication
    Experimental and finite element modeling of partial infill patterns for thermoplastic polymer extrusion 3D printed material using elasto-plastic method
    ( 2020-10-26)
    Mohd Sabri Hussin
    ;
    Sanusi Hamat
    ;
    Syamir Alihan Showkat Ali
    ;
    Muhammad Aiman Ahmad Fozi
    ;
    Yuzairi Abdul Rahim
    ;
    Mohd Syedi Imran Mohd Dawi
    ;
    Darsin M.
    Fused Deposition Modeling is known as one of the 3D printing technology where it used a thermoplastic filament to produce a prototype or a 3D part. FDM will print out the 3D part, layer by layer on the platform of the 3D printer from bottom to top using the extruded molten thermoplastic. However, there is no information about the volume enclosed by the boundary surface of the 3D part by commonly used model data format such as STL file, since the volume enclosed can be completely or partially filled. Therefore, the study and research have been carried out to investigate the strength of the 3D part affected by the design of the infill pattern where three methods being used which are design, experiment and simulation. The 3D parts were designed using CATIA V5 following the ASTM D638 for tensile test and ASTM D695 for compression test. The 3D design was then being printed using the Fused Deposition Modeling (FDM) technique for experimental purposes and to perform the quasi-static test. Furthermore, the 3D printed with infill pattern test data were then being imported to ABAQUS/Explicit software for non-linear finite element analysis using elasto-plastic approach. The best infill patterns that exhibit a better strength after the 100% fill part is the 30% fill Lines pattern. It can be concluded that the average percentage error of stress and strain values between experimental test and simulations in tensile and compression for all specimens is below than 10%.
      1
  • Publication
    Tensile Properties of 3D Printed Recycled PLA Filament: A Detailed Study on Filament Fabrication Parameters
    ( 2023-10-01)
    Sanusi Hamat
    ;
    Ishak M.R.
    ;
    Salit M.S.
    ;
    Yidris N.
    ;
    Syamir Alihan Showkat Ali
    ;
    Mohd Sabri Hussin
    ;
    Maliki Ibrahim
    ;
    Asmawi Sanuddin
    Polylactic acid (PLA), a biodegradable and biocompatible thermoplastic commonly utilized in 3D Printing filaments, undergoes changes in properties upon recycling. The objective was to elucidate the role of extrusion temperature and screw speed in modulating the quality of recycled PLA filament, as well as in controlling its dimensional attributes. Recycled PLA pellets (3D850D) were extruded using a single filament extruder machine within an extrusion temperature range of 145°C to 165°C and a screw speed varying from 2 rpm to 6 rpm. The extruded filaments were subsequently 3D printed into specimens adopting a 0° raster angle, line infill pattern, and a 100 percent infill density, then tested as per ASTM D638 mechanical standards. The study revealed a profound influence of extrusion parameters on the filament's ultimate tensile strength, yield strength, and diameter. Optimal extrusion conditions-155°C and 5 rpm-resulted in maximum mechanical strengths, while the parameters yielding filament diameters closest to commercial standards were identified as 5 rpm and 155°C. These results under-score the possibility of optimizing the recycled PLA filament's properties through adept control of extrusion parameters. Consequently, this investigation supports the potential use of recycled PLA filament in the 3D printing industry as a sustainable and performance-efficient material, offering a tangible step towards environmentally friendly additive manufacturing practices.
      1