Mohd Azaman Md Deros
Thumbnail Image
Preferred name
Mohd Azaman Md Deros
Official Name
Mohd Azaman, Md Deros
Alternative Name
Deros, Mohd Azaman
Main Affiliation
Scopus Author ID
57205730917
Researcher ID
L-7137-2013

Research Output

Filters

9 2 2
2
9
Reset filters

Settings
Now showing 1 - 9 of 9
  • Publication
    Effect of varying core density and material on the quasi-static behaviors of sandwich structure with 3D-printed hexagonal honeycomb core
    ( 2024-01-01)
    Ainin F.N.
    ;
    Mohd Azaman Md Deros
    ;
    Mohd Shukry Abdul Majid
    ;
    Mohd Ridzuan Mohd Jamir
    Additive manufacturing (AM) involves the development of complex, lightweight sandwich structures for the automotive and aerospace industries. These structures are essential for load bearing and impact resistance. Nevertheless, there is a significant obstacle of failure under compressive loading, e.g. through brittle fractures and crushing. To address this issue, this study evaluates the compressive properties, energy absorption and failure damage in quasi-static tests (flatwise, in-plane, and flexural) of sandwich composites with 3D-printed hexagonal honeycomb cores of different unit cells (6, 8 and 10 mm) and materials (polylactic acid (PLA), PLA-Carbon and PLA-Wood). The results show that increasing the core density enhances compressive strength, modulus, and energy absorption. An 8 mm unit cell absorbs energy optimally for lightweight structures. In PLA flatwise testing, the 8 mm unit cell absorbed 419.49 J more energy than the 10 mm unit cell. Additionally, PLA-Wood has better mechanical performance than PLA-Carbon due to the better filler with the PLA- matrix. In flatwise testing with an 8 mm unit, PLA-Wood absorbs 214.01 J, while PLA-Carbon absorbs 122.49 J. The failure modes vary depending on tests performed. The study highlights the potential of 3D-printed honeycomb core structures for load-bearing applications in various industries, including aerospace and automotive. Highlights: Quasi-static loading behavior of 3D-printed hexagonal honeycomb cores. Increased core density improves compressive stress, modulus, and absorbed energy. An optimal unit cell size for lightweight 3D printed core structures is 8 mm. PLA-Wood performs better in energy absorption due to filler compatibility. The failure modes are related to the type of quasi-static loads applied.
  • Publication
    Tribological Behaviour of Furcraea Foetida Fiber-Reinforced Epoxy Composites under Varying Applied Loads
    ( 2024-02-01)
    Hussain H.S.
    ;
    Mohd Ridzuan Mohd Jamir
    ;
    Mohd Shukry Abdul Majid
    ;
    Rahman A.S.A.
    ;
    Mohd Azaman Md Deros
    ;
    Sulaiman M.H.
    This study investigates the tribological behaviour of Furcraea Foetida fibre-reinforced epoxy composites under varying applied loads. The aim is to understand the influence of applied load on the frictional behaviour and wear characteristics of the composites. The study employs a pin-on-disk test to examine the frictional force, coefficient of friction (COF), and specific wear rate (SWR) of identical samples subjected to four different loads (80 N, 100 N, 120 N, 140 N). Scanning electron microscopy (SEM) is used to analyse the surface morphology under different loads. The frictional force versus sliding distance graph demonstrates an increasing trend from 80 N to 120 N, followed by minimal change at 140 N. Similarly, the COF versus applied load graph shows a progressive increase from 80 N to 120 N, with the least increase observed at 140 N. The SWR versus applied load graph indicates an increasing trend from 80 N to 120 N, with marginal variation at 140 N. SEM analysis reveals that only the sample subjected to 140 N shows evidence of plastic deformation. In conclusion, the results indicate that the applied load significantly influences the frictional behaviour and wear characteristics of the Furcraea Foetida fibre-reinforced epoxy composites. At higher loads, the increase in frictional force, COF, and SWR becomes less pronounced, suggesting potential saturation in the composites' response. The presence of plastic deformation at 140 N further highlights the unique behaviour observed at this load. These findings contribute to a better understanding of the tribological performance of the composites and have implications for their practical applications.
  • Publication
    Effects of ply orientations and stacking sequences on impact response of Pineapple Leaf Fibre (PALF)/Carbon Hybrid Laminate composites
    ( 2022)
    Mohd Khairul Rabani Hashim
    ;
    Mohd Shukry Abdul Majid
    ;
    Mohd Ridzuan Mohd Jamir
    ;
    Farizul Hafiz Kasim
    ;
    Hassan A. Alshahrani
    ;
    Mohd Azaman Md Deros
    ;
    David Hui
    This study investigated the impact response behaviours of pineapple leaf fibre (PALF)/carbon hybrid laminate composites for different ply orientations and stacking sequences. The laminates were manufactured using a vacuum infusion approach with various stacking sequences and ply orientations classified as symmetric quasi-isotropic, angle-ply symmetric, and cross-ply symmetric. The laminates were analysed using an IMATEK IM10 drop weight impact tester with an increment of 5 J until the samples were perforated. This investigation reveals that the overall impact properties of PALF and carbon as reinforcements were improved by a beneficial hybridised effect. The laminates with an exterior carbon layer can withstand high impact energy levels up to 27.5 J. The laminate with different stacking sequences had a lower energy transfer rate and ruptured at higher impact energy. The laminates with ply orientations of [0°/90°] and [±45°]8 exhibited 10% to 30% better energy absorption than those with ply orientations of [±45°2, 0°/90°2]s and [0°/90°2, ±45°2]s due to energy being readily transferred within the same linear ply orientation. Through visual inspection, delamination was observed to occur at the interfaces of different stacking sequences and ply orientations.
      12  14
  • Publication
    Tensile properties of hybridised fire retardants in pineapple leaf fibre (PALF) reinforced polymer composites
    ( 2021-10-25)
    Hazwani M.
    ;
    Mohd Shukry Abdul Majid
    ;
    Mohd Azaman Md Deros
    ;
    Mohd Ridzuan Mohd Jamir
    ;
    Cheng Ee Meng
    This paper presents the tensile properties of hybridised fire retardants Pineapple Leaf Fibre (PALF) reinforced polymer composite. The polymer composites were prepared using the hand lay-up method of fabrication, in which two-layer PALF was used, and the epoxy resin with the fire retardants were mixed. The non-hybridised fire retardants are ammonium polyphosphate (APP), magnesium hydroxide (MH) and aluminium hydroxide (ALH), while the hybridised fire retardants are ammonium polyphosphate/magnesium hydroxide (APP/MH), ammonium polyphosphate/aluminium hydroxide (APP/ALH) and magnesium hydroxide/aluminium hydroxide (MH/ALH). The samples were tested using the universal testing machine with load cell 50kN using ASTM D3039 standard. The samples APP/ALH and MH/ALH have better tensile strength, which is 37.10 MPa and 37.05 MPa, respectively. The dispersion of fire-retardants in the reinforced composites seems to affect their mechanical performance. Meanwhile, sample MH/ALH has the highest elastic modulus with 3.65 GPa. Sample MH/ALH likely to be an excellent hybridised fire-retardant filler for the composites.
      2
  • Publication
    Effects of Ply Orientations and Stacking Sequences on Impact Response of Pineapple Leaf Fibre (PALF)/Carbon Hybrid Laminate Composites
    ( 2022-09-01)
    Mohd Khairul Rabani Hashim
    ;
    Mohd Shukry Abdul Majid
    ;
    Farizul Hafiz Kasim
    ;
    Mohd Ridzuan Mohd Jamir
    ;
    Alshahrani H.A.
    ;
    Hui D.
    ;
    Mohd Azaman Md Deros
    This study investigated the impact response behaviours of pineapple leaf fibre (PALF)/carbon hybrid laminate composites for different ply orientations and stacking sequences. The laminates were manufactured using a vacuum infusion approach with various stacking sequences and ply orientations classified as symmetric quasi-isotropic, angle-ply symmetric, and cross-ply symmetric. The laminates were analysed using an IMATEK IM10 drop weight impact tester with an increment of 5 J until the samples were perforated. This investigation reveals that the overall impact properties of PALF and carbon as reinforcements were improved by a beneficial hybridised effect. The laminates with an exterior carbon layer can withstand high impact energy levels up to 27.5 J. The laminate with different stacking sequences had a lower energy transfer rate and ruptured at higher impact energy. The laminates with ply orientations of [0°/90°] and [±45°]8 exhibited 10% to 30% better energy absorption than those with ply orientations of [±45°2, 0°/90°2]s and [0°/90°2, ±45°2]s due to energy being readily transferred within the same linear ply orientation. Through visual inspection, delamination was observed to occur at the interfaces of different stacking sequences and ply orientations.
      2
  • Publication
    Low-velocity impact behavior of sandwich composite structure with 3D printed hexagonal honeycomb core: varying core materials
    ( 2022-09-01)
    Nur Ainin F.
    ;
    Mohd Azaman Md Deros
    ;
    Mohd Shukry Abdul Majid
    ;
    Mohd Ridzuan Mohd Jamir
    Additive manufacturing technology is extensively used in aeronautical applications, especially in designing the sandwich composite structures for repair tasks. However, the composite structures are vulnerable to impact loadings because of their exposure to, for instance, loading field carriages, flying debris, and bird strikes. This may lead to crack propagation and ultimately the structural failure. Therefore, it is important to investigate the mechanical behavior of sandwich composite structures under low-velocity impact. In this research, carbon fiber fabric reinforced 3D-printed thermoplastic composite of hexagonal honeycomb cores structures were fabricated with different unit cells (6, 8, and 10 mm) and varying materials (polylactic acid (PLA), PLA-Wood and PLA-Carbon). A drop weight impact test was performed under impact energies (5, 8, and 11 J) to determine the energy absorption performance of the structures whereas the surface morphology was analyzed using a high-intensity optical microscope. Comparing unit cells of materials used, it is observed that the unit cell of 8 mm is the best configuration for lightweight materials with impressive energy absorption capabilities. Under an impact energy of 11 J, the PLA-Wood of unit cell 8 mm shows 9.22 J higher in energy absorption than unit cell 10 mm which is 7.44 J due to intermediate stiffness that resists further deformation. While the filled PLA shows the PLA-Wood material offers better performance in energy absorption capability compared to PLA-Carbon. The PLA-Wood demonstrates 9.22 J more energy absorption for an unit cell 8 mm under an impact energy of 11 J than the PLA-Carbon, which is 8.49 J. This is due to the good compatibility between the hydroxyl groups of the polymer matrix and lignocellulose filler, which translates to better stiffness.
      2
  • Publication
    Effects of ply orientations and stacking sequences on impact response of Pineapple Leaf Fibre (PALF)/Carbon hybrid laminate composites
    ( 2022)
    Mohd Khairul Rabani Hashim
    ;
    Mohd Shukry Abdul Majid
    ;
    Mohd Ridzuan Mohd Jamir
    ;
    Farizul Hafiz Kasim
    ;
    Hassan A. Alshahrani
    ;
    Mohd Azaman Md Deros
    ;
    David Hui
    This study investigated the impact response behaviours of pineapple leaf fibre (PALF)/carbon hybrid laminate composites for different ply orientations and stacking sequences. The laminates were manufactured using a vacuum infusion approach with various stacking sequences and ply orientations classified as symmetric quasi-isotropic, angle-ply symmetric, and cross-ply symmetric. The laminates were analysed using an IMATEK IM10 drop weight impact tester with an increment of 5 J until the samples were perforated. This investigation reveals that the overall impact properties of PALF and carbon as reinforcements were improved by a beneficial hybridised effect. The laminates with an exterior carbon layer can withstand high impact energy levels up to 27.5 J. The laminate with different stacking sequences had a lower energy transfer rate and ruptured at higher impact energy. The laminates with ply orientations of [0°/90°] and [±45°]8 exhibited 10% to 30% better energy absorption than those with ply orientations of [±45°2, 0°/90°2]s and [0°/90°2, ±45°2]s due to energy being readily transferred within the same linear ply orientation. Through visual inspection, delamination was observed to occur at the interfaces of different stacking sequences and ply orientations.
      6  13
  • Publication
    Investigating the low-velocity impact behaviour of sandwich composite structures with 3D-printed hexagonal honeycomb core—a review
    ( 2023-03-01)
    Nur Ainin F.
    ;
    Mohd Azaman Md Deros
    ;
    Mohd Shukry Abdul Majid
    ;
    Mohd Ridzuan Mohd Jamir
    This study aims to comprehensively review previous and present research on the dynamic responses of 3D-printed sandwich composite structures. The low-velocity impact and failure mechanisms caused by the impact load and energy absorption capabilities are discussed. Investigating the processes and mechanics of a material is an essential step in addressing the structural failure problems, which are mostly caused by a fracture. The encouraging impact resistance results have prompted researchers to explore the capabilities of structural integrity to optimize performance, which can be accomplished leveraging the enhanced material and architectural combinations of sandwich composites. The ongoing research into low-velocity behaviour of fabricated sandwich composite structures with 3D-printed hexagonal honeycomb cores and varying core materials is emphasized in this study.
      2