Mohd Shihabudin Ismail
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Preferred name
Mohd Shihabudin Ismail
Official Name
Mohd Shihabudin , Ismail
Alternative Name
Ismail, Mohd Shihabudin
Ismail, M. S.
Main Affiliation
Scopus Author ID
57210590291

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A Monte Carlo simulation for a variable-value stream mapping (V-VSM) and risk assessment - failure mode and effect analysis (RA-FMEA); a case study

2023 , Mohd Shihabudin Ismail , Mohamad Shaiful Ashrul Ishak , Muhammad Iqbal Muhammad Hussain

Value Stream Mapping (VSM) is one of the most used lean manufacturing methods for determining cycle time (CT) and lead time (LT) in the process flow from customer order to shipment. Value-added (VAA) and non-value added (NVAA) events in the flow must be defined and noted in the VSM. However, there are only a few studies that take risk management into account when calculating lead times. Variable VSM (V-VSM) will be used in this report, with (minimum, most-likely(mean), maximum) values for each CT/LT and Risk Assessment-Failure Mode and Effect Analysis (RA-FMEA) for all risks reported. For a more accurate result, the model will be simulated using Monte Carlo simulation with@Risk software. Prior to the simulation, each process must be described by the best-fit probability distribution. The (minimum, most-likely(mean), maximum) time values of total CT/LT and Risk that the management should consider when preparing the raw material order, VAA/NVAA activities in the production line, Work in Progress (WIP), process layout and shipment schedule are the results of this analysis. For management, the current and future VSMs could be finalized, displaying all relevant variables. This model will be tested in a small and medium food manufacturing facility that produces mixed powder drinks. However, the emphasis of this paper will be on the Monte Carlo simulation using@Risk software based on V-VSM and RA-FMEA model created.

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Development of low-cost, high-efficiency powder transfer system for food industry

2023 , Mohd Shihabudin Ismail , Mohamad Shaiful Ashrul Ishak , Muhammad Iqbal Muhammad Hussain , C. W. Chai

Powder Transfer System (PTS) has been widely used in various industries to transport powder from one workstation to another. It speeds up the loading process while decreasing operator fatigue and manual handling. Majority of food industry in Small and Medium Enterprise (SME), Perlis, is still using the manual handling methods to transfer the powder from mixer to filling funnel station which requires higher needs of manpower. Hence, PTS is introduced to overcome the problems in the industry with the aim of development of low cost (affordable by SME industries) yet high efficiency system. Development of this system started from selecting the most suitable transfer system for food grade powder with the consideration of the working principle and safety for food and environment. Pneumatic Vacuum Conveying System (PVCS) is selected as the most suitable system in this project through the system selection process. This project also includes the system design which involves the designation of system function and design based on requirements by using the functional decomposition and engineering CAD drawing software—SolidWorks, material selections for the system components which suitable for food grade conditions, and cost estimation. Lastly, validation of the system design structure stability, transfer rate analysis, and development of the prototype are carried out at company M, one of the SME companies in Perlis, Malaysia.

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Fourier transform infrared spectroscopy of graphene nanoplatelets-glass and multi-walled carbon nanotubes-glass reinforced epoxy composite

2024-03-07 , Ahmad M.A.A. , Mohd Ridzuan Mohd Jamir , Cheng Ee Meng , Mohd Shukry Abdul Majid , Mohd Shihabudin Ismail

This study investigates the effect of nanofiller loading of graphene nanoplatelets and multi-walled carbon nanotubes on the characterisation of glass reinforced epoxy composite. The GNP-glass and MWCNT-glass composites were prepared using the hand lay-up and vacuum bagging method. The nanofiller weight fraction at 0.5, 1.5, 3, and 5 wt. % was being analysed. FTIR spectra were used to evaluate the GNP and MWCNT nanofiller's contribution to different crystalline formations in the epoxy matrix. The result indicates a variation peak in GNP-glass and MWCNT-glass reinforced epoxy composites due to nanofiller incorporation. The stretching vibration peak in the transmittance percentage was related to the better bond formation of the nanofiller with the epoxy matrix.

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Electrical conductivity of graphene-glass and carbon-glass epoxy composites

2024-04-22 , Mohammad Asraf Alif Ahmad , Mohd Ridzuan Mohd Jamir , Mohd Shukry Abdul Majid , Mohd Shihabudin Ismail , Cheng Ee Meng

In this paper, an experimental investigation is conducted to examine the electrical conductivity of glass epoxy composites containing graphene and carbon nanofillers. The hand lay-up technique was used to fabricate the GN-glass, MWCN-glass, and GN-MWCN-glass hybrid epoxy composites. The nanofiller weight fraction at 1.5 and 3 wt. % was analysed. The electrical conductivity test was carried out using two-probe methods to evaluate the GN and MWCN nanofiller's contribution to forming conductive networks within the epoxy matrix and glass fibre. The result indicates a higher electrical conductivity value of GN-MWCN-glass hybrid epoxy composites due to hybrid nanofillers incorporation. Field emission scanning electron microscope analyses the nanofiller's dispersion and random distribution in the composites. The good conductivity was related to the better bond formation of the nanofillers with the epoxy matrix. The electrical conductivity results obtained from this study will serve as a basis for investigating the correlation between electrical resistance and strain characteristics in the self-sensing monitoring composite for future research.

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Simulation of a propose new model that integrate variable value stream mapping with a risk assessment tool

2023 , Mohd Shihabudin Ismail , Mohamad Shaiful Ashrul Ishak , Muhammad Iqbal Muhammad Hussain , Amir Yazid Bin Ali

There are limited studies being done that include risk assessment when calculating lead time in manufacturing process. This study proposes a model that integrates Variable VSM (V-VSM) with Risk Assessment- Failure Mode and Effect Analysis (RA-FMEA). Each process needs to define the best fit probability distribution. Value Stream Mapping (VSM) was used in determining total throughput time, cycle time (CT) and lead time (LT). Information on Value added activities (VAA) and Non-value-added activities (NVAA) within the process need to be identified and mentioned prior to VSM analysis. Monte Carlo simulation with @Risk software was then used for the model. The simulated result produces values for (minimum, most-likely(mean), maximum) time values of total CT/LT and risk value for management to deploy in planning raw material order, VAA/ NVAA, Work in Progress (WIP), process layout and shipment schedule. Validation of this proposed model was done using a real case study involving a small /medium scale manufacturer producing several mixes of powdered drink. This paper will focus on the modelling of V-VSM and RA-FMEA for Monte Carlo simulation using @ Risk software.

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Thermal behaviour of graphene nanoplatelets and multiwalled carbon nanotubes filled-glass fibre-reinforced epoxy composites

2024-01-01 , Mohammad Asraf Alif Ahmad , Mohd Ridzuan Mohd Jamir , Sapuan S.M. , Mohd Shukry Abdul Majid , Mohd Shihabudin Ismail , Zuradzman Mohamad Razlan , Shahriman Abu Bakar

The effects of thermal behaviour on graphene nanoplatelets (GP) and multiwalled carbon nanotube (CN) nanofillers of glass fibre (GL)-reinforced epoxy composites were investigated. The paper aims at evaluating, through a single and hybrid carbon-based nanofiller on the thermal stability, mechanical properties, electromechanical properties at elevated temperature, and morphologies of the composites. The nanofillers were dispersed using a mechanical stirrer, Thinky mixer, and ultrasonic probe. Hand lay-up and vacuum bagging techniques were used in the manufacturing of composites. Real-time self-monitoring of the structural damage to the specimens under tensile and flexural tests was performed through electromechanical measurements. Using the GP–CN hybrid in the composite improved the adhesion between the hybrid nanofillers and matrix. The thermal properties of GP–GL, CN–GL, and GP–CN–GL hybrid composites increased with the hybrid nanofiller addition. Mechanical testing at elevated temperatures revealed a higher rate of strength degradation for the 1.5-mass% GP–CN–GL hybrid composite than for a single nanofiller composite. The GP–CN–GL hybrid composites exhibited a more pronounced nonlinear behaviour and lower resistance.

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Cure Behaviour and Tensile Properties of Pineapple Leaf Fibre Reinforced Natural Rubber Composites

2024-03-01 , Xuan, Yeo Yi , Mohd Ridzuan Mohd Jamir , Mohd Shukry Abdul Majid , Mohd Shihabudin Ismail , Yudhanto F. , Normahira Mamat @ Mohamad Nor , Fauziah Che Mat

Short natural fibres replace synthetic fibres as filler in natural rubber (NR) as they are environmentally beneficial and sustainable. This study investigates the cure behaviour and tensile properties of pineapple leaf fibre (PALF) reinforced NR composites at various fibre contents. The fibre contents are varied at 0, 10, 20 and 30 parts per hundred rubber (phr). PALF reinforced NR composites are prepared using a two-roll mill. Surface morphology of tensile fractured specimens is examined using scanning electron microscopy (SEM). The results demonstrated that the optimum cure time decreases significantly with greater fibre content. The hardness value increases gradually with increasing filler content. The stress-strain graphs show an increasing trend in stress at higher fibre content particularly at low strain regions. On the contrary, the tensile strength reduces when the fibre content is increased up to 30 phr. SEM analysis reveals that the fibre-matrix adhesion is considerably poor due to the fibre pullout phenomenon observed. It is indicated that higher fibre content could be possibly reinforced to NR to achieve high deformation stress at incredibly low strain regions.

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Development of variable-line balancing chart by risk assessment using Monte Carlo simulation

2023 , Mohd Shihabudin Ismail , Mohamad Shaiful Ashrul Ishak , Nor Zaiazmin Yahaya , Muhammad Iqbal Muhammad Hussain , Mohd Adzrie Radzali

Line Balancing Chart is one of the most used lean tools for determining cycle time (CT) and lead time (LT) in the production line processes flow, from raw material input until finished product output. However, for traditional Line Balancing Chart, only the average (mean) CT and LT are considered which causing inconsistent performance of the actual production line throughput rate (productivity). In this study, Variable-Line Balancing Chart (V-LBC) is introduced by considering the dynamic CT and LT in a form of (Minimum, Most Likely (mean), Maximum) for each process involved in the production line. The risk assessment for Value-added (VAA) and non-value added (NVAA) events in the flow are also considered for this V-LBC. A Monte Carlo simulation by using @Risk software is utilized to simulate each process CT distribution capability. As a result, each process in the V-LBC could be represented in horizontal and vertical time variables that involve a variable CT (VAA and NVAA) and risk assessment using Risk Assessment-Failure Mode and Effect Analysis (RA-FMEA) approach. The actual root cause led to the process variation also could be identified more accurately from the V-LBC. Hence the correct action could be taken in order to reduce the variation which indirectly increase the production line productivity.

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Performance evaluation on locomotion system, body size and hull design on amphibious-based design of unmanned ground vehicle using Taguchi method

2023 , Mohd Iqhwan Izhar , Muhammad Shahar Jusoh , Rosmaini Ahmad , Mohd Shihabudin Ismail , Wan Nor Munirah Ariffin

Unmanned Ground Vehicle (UGV) is a robotic structured-based vehicle that operated on the ground but did not contain any human on board. It controlled either autonomously or remote controlled by a human operator from a distance. The operator observes the situation by using a camera that contains live feed that had been attached to the UGV. More advanced version of UGV is called "Autonomous UGV", where it controlled fully by sensors system. Thus, make this version of UGV highly reliable in replacing human for doing jobs in hazardous area or a place that is impossible for human to reach. This paper study the performance evaluation of UGV in term of their locomotion system, body size and hull design by using Taguchi method. The current UGV design under study is less flexible as it only operates on land. The objective of this study is to identify the optimal design parameters of the UGV towards amphibious functionality development. This study bridge the gap between engineering and management perspectives in reducing the time needed to perform testing on new design and reducing cost of experiment by using the Taguchi Method. The result shows that the ideal parameters design combination based on the signal-to-noise ratio calculated using the larger the better formula is the wheeled locomotion system with 350 X 250 X 200 dimension of body size and round-bottom shape of hull design.

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Influence of multi-walled carbon nanotubes on thermal behaviour and mechanical properties of pineapple leaf fibre-based natural rubber composites

2024-05-01 , Yi Xuan Y. , Mohd Ridzuan Mohd Jamir , Mohd Shukry Abdul Majid , Md. Tasyrif bin Abdul Rahman , Yudhanto F. , Azduwin Khasri , Mohd Shihabudin Ismail

Replacing synthetic fibres with natural fibres as reinforcement fillers in natural rubber (NR) tends to yield eco-friendly bio-composites. This study investigated the tensile and hardness properties, and the thermal behaviour of pineapple leaf fibre (PALF)-reinforced NR composites with and without the addition of multi-walled carbon nanotubes (MWCNT). The fibre content was varied at 0, 10, 20, and 30 parts per hundred rubber (phr) and the MWCNT content was fixed at 10 phr. The surface morphology of the tensile-fractured specimens was examined using scanning electron microscopy (SEM) to identify the rubber-matrix adhesion and tear mechanisms of the fibres in the NR matrix. The results revealed that including the PALF and MWCNT allowed the NR composites to exhibit excellent stretching stress at low elongations. Additionally, the composites displayed enhanced stiffness, further increasing the hardness of the composite, ranging from 46.8 to 62.8 Shore A. However, PALF reduces the thermal stability of the composite, where the initial degradation temperature increases. From the thermogravimetric analysis, the residues remaining in the NR composites ranged from 6 to 13% at various fibre loadings. Therefore, this study provides valuable insights into the tensile and hardness properties and the thermal behaviour of PALF-reinforced NR composites to improve end-use properties.

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