Muhammad Ikman Ishak
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Preferred name
Muhammad Ikman Ishak
Official Name
Muhammad Ikman, Ishak
Alternative Name
Ishak, Muhammad Ikman
Ishak, M. I.
Ikman Ishak, Muhammad
Main Affiliation
Scopus Author ID
37107980200
Researcher ID
AAD-5062-2019

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  • Publication
    Influence of different materials on the mechanical aspects in the design of cyclone gasifier
    (IOP Publishing, 2020)
    Khor Chu Yee
    ;
    Mohd Al-Hafiz Mohd Nawi
    ;
    Muhammad Ikman Ishak
    ;
    Z. X. Wei
    ;
    Mohd Uzair Mohd Rosli
    Cyclone gasifier is used as the energy conversion system for the biomass. The design and material selection for the cyclone gasifier is important, which affect the strength of the gasifier during the operation. This research aims to investigate the effect of the various materials to the mechanical aspects (i.e., stress, strain and displacement) of the cyclone gasifier. The mechanical aspects analysis is carried out by using the finite element (FE) based software. The stress, strain and displacement of the cyclone gasifier’s structure was analyzed for various stainless steel materials (i.e., ferritic (FSS), AISI 316, 1023 CSS, 201 ASS and AISI 4130). The finite element analysis revealed the use of 201 ASS experienced highest stress (221 MPa). Lowest strain and displacement were found on 201 ASS and 1023 CSS, respectively. These research findings are expected to be used as the reference for the engineer in the material selection process for the design and fabrication of cyclone gasifier.
  • Publication
    Experimental and computational evaluations of the mechanical stresses of banana trunk fibre-reinforced epoxy resin composite in coffee table application
    (IOP Publishing, 2020)
    Muhammad Ikman Ishak
    ;
    Mohd Uzair Mohd Rosli
    ;
    Khor Chu Yee
    ;
    C N Ismail
    ;
    Mohd Al-Hafiz Mohd Nawi
    The banana plant including the trunk is normally disposed after it has produced fruits once in its lifetime and becoming unproductive. Herbicide injection and burning using kerosene are the examples of current disposing method. Those methods are unfavourable owing to bad effects to the environment. Therefore, the unproductive banana trunk through its fibre properties, has a high potential to be used as composite in saving the environment. Three tensile test specimens were prepared with two of them have different length of banana fibres – shorter and longer than 0.5 mm, whilst another specimen has no fibres. The elastic modulus, Poisson’s ratio, and vertical load of 2 GPa, 0.3, and 981 N, respectively, were applied towards numerical models. The results exhibited that the composite with short banana fibre length promoted encouraging maximum and break stress values. Besides, the properties of the composite are well appropriate to be applied in furniture making as satisfactory stress value recorded in the computational analysis.
  • Publication
    Numerical Simulation of Biodiesel Synthesis in T- Channel Microreactor
    ( 2020-07-09)
    Siti Nor Azreen Ahmad Termizi
    ;
    Khor Chu Yee
    ;
    Mohd Al-Hafiz Mohd Nawi
    ;
    Syafiqah Binti Mohd Aris N.
    ;
    Muhammad Ikman Ishak
    ;
    Rosli M.U.
    Biodiesel promising as an alternative to the diesel. The transesterification reaction process involved the reaction of triglyceride with alcohol in the presence of catalyst. In the research, the Computational Fluid Dynamic (CFD) method was used to simulate the transesterification reaction process. The inlet pressure range from 0.0001 Pa to 0.01 Pa, temperature of 25°C, 50°C, 75°C and the molar ratio at 6:1, 9:1 were used to investigate their effect of toward the biodiesel conversion. Finding shows that high conversion of biodiesel occurred at low inlet pressure of 0.001 Pa with temperature of 50°C and the ethanol to oil molar ratio at 9:1.
      2  32
  • Publication
    Thermo-mechanical analysis of various solder materials via finite element method
    ( 2020-11-02)
    Khor Chu Yee
    ;
    Siti Nor Azreen Ahmad Termizi
    ;
    Muhammad Ikman Ishak
    ;
    Hissam M.I.B.
    ;
    Ani F.C.
    The thermal environment may cause the unintended thermal stress to the solder joint which could lead to the reliability issue. This study aims to study the temperature cycling analysis of various solder materials (i.e., Sn-58Bi, Sn-3.5Ag and Sn-9Zn) by using the finite element method. A leadless solder joint of the surface mount component was considered and the three-dimensional model was created in the simulation software. The thermo-mechanical aspects (i.e., maximum displacement, stress and strain) of lead-free solder materials were investigated. The simulation results revealed the solder material significantly affects the thermo-mechanical aspects during the temperature cycling test. The maximum stress of the leadless solder joint was concentrated around the interface region of the solder and pad. The lowest stress (195MPa) was noticed on the solder joint when the Sn-58Bi material was applied. This study is expected to provide the understanding of the thermo-mechanical aspects of various solder materials during the temperature cycling test.
      25  3
  • Publication
    The effect of silica toward polymer membrane for water separation process
    ( 2017-09-26)
    Mohd Riduan Jamalludin
    ;
    Rosli M.U.
    ;
    Muhammad Ikman Ishak
    ;
    Khor Chu Yee
    ;
    Mohamad Suhaimi Shahrin
    ;
    Ras Izzati Ismail
    ;
    Lailina N.M.
    ;
    Leng Y.L.
    ;
    Hazrin Jahidi Jaafar
    The aim of this present work was to investigate the effect of different percentage rice husk silica (RHS) particles composition towards polymer mixed matrix membrane microstructure and performance in water separation process. The polymer membranes were prepared by a phase inversion method using polysulfone (PSf), N-methyl-2-pyrrolidone (NMP) as solvent, distilled water as non-solvent and fixed RHS at 400°C as an additive. The microstructures of PSf/PEG/RHS sample were characterized by performing scanning electron microscope (SEM). The performance was measured by using pure water flux and humic acid for the rejection test. The analyzed result of SEM analysis revealed that the addition of RHS obviously improved the microstructure of the membrane especially at the top and sub layer at the range of 1 until 3 wt. %. This was proven by the pure water flux (PWF) value measured from 114.47 LMH to 154.04 LMH and rejection from value 83% to 96% at this specified range substantially higher than the mixed matrix membrane with synthetic silica. In fact, the presence of RHS particles not only improved the properties and performance of membrane but also possess biodegradable properties which can minimize the pollution and provide a membrane green technology system.
      33  1
  • Publication
    Effect of heat sink design on the thermal characteristic in computational fluid dynamics analysis
    ( 2020)
    Khor Chu Yee
    ;
    Mohd Al-Hafiz Mohd Nawi
    ;
    Muhammad Ikman Ishak
    ;
    Kee Wei Chin
    ;
    Mohd Uzair Mohd Rosli
    ;
    Mohd Riduan Jamalludin
    ;
    Siti Nor Azreen Ahmad Termizi
    The thermal management in the electronic device or system using the heat sink is important to ensure the device or system operating under the allowable temperature. The present study aims to investigate the thermal characteristic (i.e., temperature distribution) of the various heat sink designs via computational fluid dynamics (CFD) analysis. The electronic cooling process of the heat sink is carried out via CFD software. The temperature distribution of the various heat sink designs (i.e., plate fin, circular pin fin and rectangular fin) was analyzed and compared. The CFD analysis revealed the plate fin heat sink has lowest temperature distribution on the fin region. High temperature distribution was observed on the pin fin heat sink. The non-uniform temperature distribution was attributed by the direction of inlet airflow, whereas the low temperature was found in the region that close to the inlet airflow. Thus, the research findings indicated the design of heat sink significantly affects the temperature distribution during the electronic cooling process.
      3  28
  • Publication
    Simulation-based optimization of plastic injection molding parameter for automotive car wheel fabrication using Response Surface Methodology (RSM)
    (IOP Publishing, 2020)
    Mohd Uzair Mohd Rosli
    ;
    Khor Chu Yee
    ;
    Mohd Al-Hafiz Mohd Nawi
    ;
    Haris Ismail
    ;
    Muhammad Ikman Ishak
    In the era of revolution industry 4.0, most companies can expect metal-to-plastic conversion to result in cost savings. The objectives of this study are to find the most appropriate material composition and the injection molding process parameter to produce a plastic car wheel as a substitute for metal and aluminum alloy. The Polyetherimide (PEI) with different compositions are simulated using MoldFlow software and optimized the quality of injection molding process parameter by using Central Composite Design (CCD) in Response Surface Methodology (RSM) as to get an optimal response and meets the car wheel requirement specification. The crucial factors are melting temperature, injection time and cooling time. The quadratic model fits the model response. As the results, the optimum values suggested by the software were melt temperature of 370.27°C, 1.8s of injection time and 2599.89s of cooling time for 0% of filler (pure PEI). With small differences error value between solution and simulation, 0.1% of shrinkage and 0.9% for warpage, the results were acceptable.
      10  2
  • Publication
    Computational Fluid Dynamics (CFD) Simulation on Mixing in T-Shaped Micromixer
    ( 2020-12-18)
    Ahmad Termizi S.N.A.
    ;
    Khor Chu Yee
    ;
    Ahmad N.
    ;
    Mohd Al-Hafiz Mohd Nawi
    ;
    Muhammad Ikman Ishak
    ;
    Mohd Uzair Mohd Rosli
    ;
    Mohd Riduan Jamalludin
    Computational Fluid Dynamics (CFD) simulation used to analyse the fluid mixing in micromixer. There are two cases of miscible liquids that involved within T-shaped micromixer which are ethanol-water and glycerol-water. The T-shaped micromixer consist of micro channel with two inlets channels and one outlet channel was constructed by using AutoCAD software. The effect of inlet velocity and width size toward mixing intensity were investigated. The mixing intensity values determine either good or bad mixing quality could be achieved. In this simulation, at low inlet velocity indicates good mixing quality as the mixing intensity value approaching to one. Whereas the effect of width size on mixing intensity are almost similar throughout simulated width sizes. Mixing intensity for the two cases of diffusion coefficient showed similar trend for different inlet velocity and width size of mixing channel.
      7  26
  • Publication
    Simulation Based Optimization of Thin Wall Injection Molding Parameter Using Response Surface Methodology
    ( 2020-07-09)
    Rosli M.U.
    ;
    Siti Nor Azreen Ahmad Termizi
    ;
    Khor Chu Yee
    ;
    Mohd Al-Hafiz Mohd Nawi
    ;
    Akmal Omar A.
    ;
    Muhammad Ikman Ishak
    Improper mold design or processing parameter setting could make a bad impact on the appearance of molded part. It becomes more challenging if the ratio of the part size compared with its wall thickness is greater. Process parameters such as mold and melt temperature, injection temperature including the cavity layout directly affect product quality and cost. It is a complex and difficult task to improve these multi parameters. The objective of this research is to determine optimum settings for processing parameters for a thin walled product by using Response Surface Methodology. Melting temperature, mold temperature, injection pressure and cavity layout are selected as processing parameters and Polyurethane material is selected for this research. Volumetric shrinkage and warpage are selected as the main quality criteria to be controlled respected with the product design specifications. As the result, optimum process parameter settings were mold temperature of 29.89°C, melting temperature of 220°C, and 181.30MPa injection pressure with 'H' branching cavity layout. With small differences error value between solution and simulation, 0.31% for volumetric shrinkage and 0.126% for warpage, the result was acceptable.
      5  30
  • Publication
    Biomechanical assessment of different surgical approaches of zygomatic implant placement on prosthesis stress
    ( 2020-12-18)
    Muhammad Ikman Ishak
    ;
    Mohd Uzair Mohd Rosli
    ;
    Mohd Riduan Jamalludin
    ;
    Siti Nor Azreen Ahmad Termizi
    ;
    Khor Chu Yee
    ;
    Mohd Al-Hafiz Mohd Nawi
    The treatment of severely atrophic posterior maxillae without bone augmentation by using zygomatic implants has received a major attention in prosthodontics due to great implant survival rates. However, mechanical implant system failures were still reported irrespective of surgical techniques used for zygomatic implant placement. Two main prominent approaches, the intrasinus and extramaxillary possess their own advantages and drawbacks with no particular indication found, to date, to highlight the best technique in relation to prosthesis stress. Thus, this study emphasised on the computational evaluation of both approaches with regards to the prosthesis responses. Two sets of finite element models comprising bones, soft tissue, implants, abutments, and prosthesis were prepared accordingly. The models were then assigned with the material properties, contact modelling, and loadings as closely as possible with the real conditions. The results showed that the extramaxillary technique reported a more promising maximum stress value and distribution within the prosthesis than the intrasinus. Moreover, the prostheses in both approaches seemed to have a low tendency to failure as the stress levels were significantly less than the stress limit of the material.
      4  38