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Articles by D.A. Wahab
Total Records ( 5 ) for D.A. Wahab
  D.A. Wahab , N.F. Adull Manan , M.A. Hannan , S. Abdullah and A. Hussain
  Today, intelligent safety systems are installed in modern cars in view of minimising road hazards. An intelligent air bag system for example, comprised several subsystems that are integrated to include the weight sensor system, image sensor system, crash sensor system and tyre pressure monitoring system. These systems when poorly positioned into the car seat, will certainly affect comfort and reliability of the car seat. This research presents the design work on an intelligent car seat, which is equipped with a load cell type-sensory system. The load cells are used to detect the weight of a passenger for the deployment of an air bag system. The proposed design is validated against displacement and stress analysis using an 80 kg load to simulate the weight of a passenger. Results from the design validation indicated that the proposed configuration and material is appropriate for use in the intelligent car seat application.
  T.F. Go , D.A. Wahab , M.N. Ab. Rahman and R. Ramli
  Problem statement: It is expected that over the next few years type approval legislation and public awareness will force vehicle manufacturers to identify recovery methods during the design process in order to achieve reuse and recycling targets. Current vehicle design in Malaysia does not sufficiently aid the economic recovery of parts and materials to reach these targets. Approach: This study aimed to provide a framework for automotive components to be designed for ease of recovery. Disassemblability concept evolved from the life cycle engineering concept in which design for disassembly is one of the strategies in reducing the impact of the product to the environment. Results: The proposed methodology that consisted of three distinct elements namely implementing principles and guidelines of design for disassembly into the design, generating optimum disassembly using genetic algorithm approach and evaluating disassemblability of end-of-life products will be discussed. Conclusion/Recommendations: There is a need for effective disassembly in order to enhance the recovery of end-of-life product.The proposed methodology was implemented as a computer-based disassemblability evaluation tool that will enhance disassemblability of the product starting from the design stage.
  A.A. Lashlem , D.A. Wahab , S. Abdullah and C.H. Che Haron
  In recent years, many industrial countries face the consequences of a wide flow of consumer goods and limited product life spans, resulting in a continuous increase in the quantity of used manufactured goods. This occurrence certainly increases the problem of disposal of used products. In this study, of particular interest is the disposal of solid waste from used vehicles. With the facilities of landfill sites rapidly declining due to government legislations, problems of solid waste disposal would continue persist. At present, environmental concerns and government legislations in many developed and developing countries are increasingly guided by the inventor principle, which capitalizes that inventors, designers, or whosoever inflict damage on the environment should likewise remove such damage. This, in turn, has compelled manufacturers to undertake recycling efforts at the end-of-life stage of their products. This entire exercise has resulted in huge implications on the product end-users, producers and the end-product recyclers. Designing for the environment is a necessary concern throughout the life cycle of a product. This means, that the recyclability of a product or its parts should be deliberated on from the on-set, namely from the design, manufacture, use or service, until the end-of-life stage. Management of solid wastes from vehicles considers product recycling by reuse, remanufacturing and reassembling, which is collectively known as End-of-Life-Vehicle (ELV) consequently, this study explores the efforts thus far in published literatures, to implement ELV around the world.
  D.A. Wahab and Z.F. Fadzil
  The automotive industry is facing a number of serious challenges related to the environmental impact of automotives throughout their entire life cycle. Recent initiatives on recovery of end of life vehicle component had a new impact not only to the automotive industry, but also the public at large. In Malaysia, despite a higher awareness on end of life recovery among the industry, it is uncertain as to whether the public are aware of the new phenomenon that has been successfully implemented in many developed countries including Europe and Japan. The aim of this study is to ascertain the level of knowledge of the public community with regard to end of life vehicle recovery. The study was conducted through field study based surveys on a public community of 400 respondents residing in Shah Alam, an industrial area in the state of Selangor in Malaysia. Out of the nine questions given to respondents, a total of seven questions attained answers in the range of ‘agree’ and ‘strongly agree’ giving a total percentage of 80.83%. While two questions attained answers in the range of ‘strongly disagree’ to ‘not sure’, giving a total percentage of 19.17%. The results of this study indicates that the knowledge of ELV need to be enhanced if end of life vehicle reuse is to be implemented to support a sustainable automotive development in the country. Several suggestions have been put forward in this paper to ensure a succesful implementation of ELV recovery in Malaysia.
  D.A. Wahab , A. Abidin and C.H. Azhari
  This study presents the findings from a study on the consumption of recycled materials and recycling practices in the plastics manufacturing industry and recycling companies in Malaysia. The findings were obtained from a survey conducted in twenty plastic manufacturing companies and detailed case studies in three recycling companies. The survey conducted in the plastic manufacturing companies’ shows that the consumption rate for poly-olefins (PP and PE) is the highest among the resin types and the industrial sector that consumes the most plastic materials is the electrical and electronics sector. The consumption of recycled materials is high among the local manufacturing companies (80%) which are largely due to cost savings; about 20% of these companies conducted in-house recycling. The study has also shown that the medium scale industry consumes the most recycled materials as compared to the large and small scale industry. The rate of disposal for plastic materials in the local industry is approximately 5%. The detailed case studies conducted in the recycling companies have successfully identified the main processes involved in plastic recycling namely manual sorting, cleaning, drying, meshing/pelletising and packaging. These recycling companies obtained recycled materials from various sources including industrial scrap, dumping sites, local producers as well as imported sources. Pricing of recycled materials were based on classification according to grade and quality of the recycled materials. The study has reflected the extent of in-house recycling trends in the local plastic manufacturing companies and their dependency on the supply from the local recycling companies.
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