Mohd Asrul Md Saad
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Mohd Asrul Md Saad
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Mohd Asrul , Md Saad
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Determination of blind spot zone for motorcycles

2019-12-02 , Mohd Sani Mohamad Hashim , Hamati A.A.A. , Mohd Hafzi M.I. , Shahriman Abu Bakar , Abdul Halim Ismail , Muhamad Safwan Muhamad Azmi , Azizi Harun , Zuradzman Mohamad Razlan , Nur Saifullah Kamarrudin , Ishak Ibrahim , Mohd Khairul Faizi Abd Rahman , Mohd Asrul Md Saad , Mohd Afendi Rojan

The problem of the blind spot zone (BSZ) for motorcycles is common, as it causes many accidents that occur between motorcycles and cars, or motorcycles with other vehicles. The problem of BSZ is occurring for many reasons, such as if the motorcyclist wants to change the lane or manoeuvre or turn without realizing the presence of other vehicle which may cause a terrible collision and leads to casualties, either because of darkness, the full dependence on side mirrors that give a limited scope of vision, or due to a malfunction in the front lights of the car that prevented the motorcyclists from recognizing it. However there were limited research on identifation of BSZ for motorcycle, even though most vehicle accidents in Malaysia involved motorcycles. This paper discusses the initial works on the identification of BSZ for motorcyles. Three types of motorcycles were used to determine the BSZ using grid-based technique. From the data collected, the BSZ was identified for the motorcycles.

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Study on modal and harmonic response analysis by modifying motorcycle chassis using finite element method

2021-10-25 , Wong Y.J. , Mohd Sani Mohamad Hashim , Shahriman Abu Bakar , Anas Abdul Rahman , Aziz I.A. , Mohd Asrul Md Saad , Nasirudin M.A. , Zuradzman Mohamad Razlan , Nur Saifullah Kamarrudin , Ishak Ibrahim , Mohd Khairul Faizi Abd Rahman

Motorcycle chassis is one of the most important structures in the design of a motorcycle. Excessive vibration occurs in chassis is undesirable as it may lead to structural failure and discomfort among riders. This study aims to model the motorcycle chassis and carry out dynamic analysis to understand the behaviour of the chassis under vibration. Modelling of chassis was conducted based on Seri Perlis motorcycle, which is characterised by double cradle frame. In dynamic analysis, the modal and harmonic response analysis were employed in this study of the motorcycle chassis and the material used is low carbon steel. Both modal and harmonic response analysis were conducted using Ansys. The results show natural frequencies for six mode shapes and the steady-state response of the chassis under the engine weight excitation revealed that the deformation under z-axis orientation was more prevalent. From this study, the dynamic behaviour of the chassis was understood and improvement of the chassis can be made in the future.

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CFD Simulation on an Improvised Ice Cream Container

2023 , Mohd Tasyrif Abdul Rahman , Nursyazwani Abdul Aziz , Nasrul Amri Mohd Amin , Mohd Ijmal Kamil Patriot , Mohd Sofwan Mohd Resali , Azizul Mohamad , Muhammad Izham Ismail , Mohd Asrul Md Saad

A temperature-sensitive product such as ice-cream may cause the industry to face several challenges throughout the production, storage, packaging, and distribution processes. With the purpose to improve the performance of an ice cream container that acts as cold storage during the delivery process, the integration of a tube-type phase change material (PCM) thermal storage system was studied. In this work, a Computational Fluid Dynamic (CFD) method was used to model and analysed eight designs of phase change thermal storage systems incorporated within the ice-cream container. The tube type PCM was modeled, with and without the conducting pins, aiming to maximise the heat exchange within the system. To obtain a proper design, parametric studies on the number of pins and its diameter were further analysed. For all simulations, the initial time for freezing simulation was set to 2℃, assuming the PCM was fully in a liquid state with the ice mass fraction was set to 0. With that, the PCM average temperature and the total mass fraction was observed and analysed. From the results, the ice mass fraction percentage of the systems was observed to increase with the increasing number of pins. Model with (the maximum) 40 pins has improved ice mass fraction for at least 67.58% when compared to the configuration without pin. Also, the average temperature of PCM for model with maximum pins, was observed to be 37.14% lower when compared to the configuration without pins and less pin numbers. Nevertheless, although the presence of pins has proven to enhance the heat exchange within the system, the percentage of ice formation was considered to be low and the average temperature was still as high as 0.66℃ after 12 hrs of freezing process. This indicating that a proper design of TES is inevitably needed, in order to maximise both heat exchanges and PCM storage ability within the system. © 2023, Semarak Ilmu Publishing. All rights reserved.

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