Mohd Fathullah Ghazli@Ghazali
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Preferred name
Mohd Fathullah Ghazli@Ghazali
Official Name
Mohd Fathullah, Ghazli@Ghazali
Alternative Name
Fathullah, Mohd
Ghazli, Mohd
Ghazli, M. F.
Ghazali, Mohd Fathullah
Fathullah, G. M.
Main Affiliation
Scopus Author ID
57428935900
Researcher ID
AAK-5597-2020

Research Output
Now showing 1 - 3 of 3
  • Publication
    Optimisation of shrinkage and strength on thick plate part using recycled LDPE materials
    ( 2021)
    Norshahira Roslan
    ;
    Shayfull Zamree Abd. Rahim
    ;
    Abdellah El-hadj Abdellah
    ;
    Mohd. Mustafa Al Bakri Abdullah
    ;
    Katarzyna Błoch
    ;
    Paweł Pietrusiewicz
    ;
    Marcin Nabiałek
    ;
    Janusz Szmidla
    ;
    Dariusz Kwiatkowski
    ;
    Joel Oliveira Correia Vasco
    ;
    Mohd. Nasir Mat Saad
    ;
    Mohd Fathullah Ghazli@Ghazali
    Achieving good quality of products from plastic injection moulding processes is very challenging, since the process comprises many affecting parameters. Common defects such as warpage are hard to avoid, and the defective parts will eventually go to waste, leading to unnecessary costs to the manufacturer. The use of recycled material from postindustrial waste has been studied by a few researchers. However, the application of an optimisation method by which to optimise processing parameters to mould parts using recycled materials remains lacking. In this study, Response Surface Methodology (RSM) and Particle Swarm Optimisation (PSO) methods were conducted on thick plate parts moulded using virgin and recycled low-density polyethylene (LDPE) materials (100:0, 70:30, 60:40 and 50:50; virgin to recycle material ratios) to find the optimal input parameters for each of the material ratios. Shrinkage in the x and y directions increased in correlation with the recycled ratio, compared to virgin material. Meanwhile, the tensile strength of the thick plate part continued to decrease when the recycled ratio increased. R30 (70:30) had the optimum shrinkage in the x direction with respect to R0 (100:0) material where the shrinkage increased by 24.49% (RSM) and 33.20% (PSO). On the other hand, the shrinkage in the y direction for R30 material increased by 4.48% (RSM) and decreased by 2.67% (PSO), while the tensile strength of R30 (70:30) material decreased by 0.51% (RSM) and 2.68% (PSO) as compared to R0 (100:0) material. Validation tests indicated that the optimal setting of processing parameter suggested by PSO and RSM for R0 (100:0), R30 (70:30), R40 (60:40) and R50 (50:50) was less than 10%.
  • Publication
    Warpage optimisation using Recycled Polycar-bonates (PC) on Front Panel Housing
    ( 2021)
    Nur Aisyah Miza Ahmad Tamizi
    ;
    Shayfull Zamree Abd. Rahim
    ;
    Abdellah El-hadj Abdellah
    ;
    Mohd. Mustafa Al Bakri Abdullah
    ;
    Marcin Nabiałek
    ;
    Jerzy J. Wysłocki
    ;
    Bartłomiej Jeż
    ;
    Paweł Palutkiewicz
    ;
    Rozyanty Abdul Rahman
    ;
    Mohd. Nasir Mat Saad
    ;
    Mohd Fathullah Ghazli@Ghazali
    Many studies have been done using recycled waste materials to minimise environmental problems. It is a great opportunity to explore mechanical recycling and the use of recycled and virgin blend as a material to produce new products with minimum defects. In this study, appropriate processing parameters were considered to mould the front panel housing part using R0% (virgin), R30% (30% virgin: 70% recycled), R40% (40% virgin: 60% recycled) and R50% (50% virgin: 50% recycled) of Polycarbonate (PC). The manufacturing ability and quality during preliminary stage can be predicted through simulation analysis using Autodesk Moldflow Insight 2012 software. The recommended processing parameters and values of warpage in x and y directions can also be obtained using this software. No value of warpage was obtained from simulation studies for x direction on the front panel housing. Therefore, this study only focused on reducing the warpage in the y direction. Response Surface Methodology (RSM) and Genetic Algorithm (GA) optimisation methods were used to find the optimal processing parameters. As the results, the optimal ratio of recycled PC material was found to be R30%, followed by R40% and R50% materials using RSM and GA methods as compared to the average value of warpage on the moulded part using R0%. The most influential processing parameter that contributed to warpage defect was packing pressure for all materials used in this study.
  • Publication
    Optimisation of shrinkage and strength on thick plate part using recycled LDPE materials
    ( 2021)
    Norshahira Roslan
    ;
    Shayfull Zamree Abd. Rahim
    ;
    Abdellah El-hadj Abdellah
    ;
    Mohd. Mustafa Al Bakri Abdullah
    ;
    Katarzyna Błoch
    ;
    Paweł Pietrusiewicz
    ;
    Marcin Nabiałek
    ;
    Janusz Szmidla
    ;
    Dariusz Kwiatkowski
    ;
    Joel Oliveira Correia Vasco
    ;
    Mohd. Nasir Mat Saad
    ;
    Mohd Fathullah Ghazli@Ghazali
    Achieving good quality of products from plastic injection moulding processes is very challenging, since the process comprises many affecting parameters. Common defects such as warpage are hard to avoid, and the defective parts will eventually go to waste, leading to unnecessary costs to the manufacturer. The use of recycled material from postindustrial waste has been studied by a few researchers. However, the application of an optimisation method by which to optimise processing parameters to mould parts using recycled materials remains lacking. In this study, Response Surface Methodology (RSM) and Particle Swarm Optimisation (PSO) methods were conducted on thick plate parts moulded using virgin and recycled low-density polyethylene (LDPE) materials (100:0, 70:30, 60:40 and 50:50; virgin to recycle material ratios) to find the optimal input parameters for each of the material ratios. Shrinkage in the x and y directions increased in correlation with the recycled ratio, compared to virgin material. Meanwhile, the tensile strength of the thick plate part continued to decrease when the recycled ratio increased. R30 (70:30) had the optimum shrinkage in the x direction with respect to R0 (100:0) material where the shrinkage increased by 24.49% (RSM) and 33.20% (PSO). On the other hand, the shrinkage in the y direction for R30 material increased by 4.48% (RSM) and decreased by 2.67% (PSO), while the tensile strength of R30 (70:30) material decreased by 0.51% (RSM) and 2.68% (PSO) as compared to R0 (100:0) material. Validation tests indicated that the optimal setting of processing parameter suggested by PSO and RSM for R0 (100:0), R30 (70:30), R40 (60:40) and R50 (50:50) was less than 10%.