Papers by Author: Nawal Aswan Abdul Jalil

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Authors: S.T. Cheng, Nawal Aswan Abdul Jalil, Zamir A. Zulkefli
Abstract: Vibration based technique have so far been focused on the identification of structural damage. However, not many studies have been conducted on the corrosion identification on pipes. The objective of this paper is to identify corrosion on pipes from vibration measurements. A hollow pipe, 500 mm in length with 63.5 mm in diameter was subjected to impact loading using an impact hammer to identify the natural frequency of the tube in two conditions i) without any corrosion and ii) with an induced localized 40 mm by 40 mm corrosion at the middle of the pipe. The shift of natural frequencies of the structures under free boundary conditions was examined for each node of excitation. The results showed that there is a shift in natural frequency of the pipe, between 3 and 4 Hz near to the corrosion area. It can suggested that that the impact vibration is capable of identifying of localized corrosion on a hollow tube.
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Authors: M.S.S. Mohamed, B.M.T Shamsul, R. Rahman, Nawal Aswan Abdul Jalil
Abstract: Car center stack designs have evolved rapidly throughout the years. Manufacturers are working hard in keeping up with the current trends in the automotive market by offering latest technologies embedded into car center stack designs. Consistent with the current trend, Malaysian automotive manufacturers are offering advanced features in car center stacks, which includes touchscreen and navigation systems. Recently car center stacks became the highlight as it became a potential source for driver distraction. An exploratory qualitative study, involving eight regular drivers and two professional drivers were recruited for this exploratory study. A laddering interview technique was applied to reveal chains of attributes, consequences and values. Several prominent attributes related to the value of safety were “Simple Design”, “Touchscreen”, “Meter Design”, and “Multi-Function Steering”. Touchscreen systems were perceived differently by professional drivers compared with regular drivers. There is a need for further studies regarding the touchscreen system designs for Malaysian drivers.
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Authors: Swee Kei Lee, Nawal Aswan Abdul Jalil
Abstract: The paper presents a literature review of the efficacy of side passive safety in the event of lateral collision and the latest development of side airbag. According to the latest Global Status Report on Road Safety 2013, the total number of death every year due to road accident still maintained in a huge number of 1.24 million. Malaysia is one of the countries having highest estimated road traffic death rate of 25 per 100,000 populations. Moreover, 5% growth annually of fatalities rate forecasted. In general, lateral collision or side impact is the second most common vehicle crash type which takes almost 10,000 occupant deaths each year. Side airbags were introduced into vehicle firstly in 1995 in order to improve occupants injury. It is statically proven that combination of head with thorax side airbag is very effective in reducing occupants fatalities rate, however thorax only airbag is less significant. With the aid from Computer Aided Engineer (CAE) software, designer can further improve airbag design and optimize its performance in order to find the best combination of design parameter such as of area of air vent, Time-To-Fire (TTF), operating pressure of the inflator gas and many more, while design cycle time can be reduced significantly up to 40%. Nevertheless, people are afraid that side airbag deployment load may hurt children and small size female seated in Out-Of-Position (OOP). Researcher could resolve it by adopting the latest Computer Fluid Design (CFD) airbag simulation technique which have a better simulation result of OOP load, since CFD method provide more realistic airbag deployment simulations especially in the first few milliseconds which are significant in OOP test.
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