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ABSTRACT: Product recovery and life extension are critical activities in the
cradle to cradle life cycle philosophy. These activities are very much dependent
on the product’s ability to be effectively disassembled into its component or
even material constituents. Among the elemental task of disassembly is fastener
removal. Thus, when considering the design for disassembly (DfD), many
fastener associated factors need to be considered but very few DfD method
effectively supports fastener selection especially in the early stage of design.
The process of selecting a fastener for its functional requirement is already
complex. Additionally, the requirements for disassemblability further
complicate the process. This paper proposes the development of a multi criteria
decision making model to assist designers in selecting fasteners for DfD.
PROMETHEE method was used developing the decision making model for
selecting fastener that considers both functionality and disassemblability. A
design case study is described to reflect the usefulness of the fastener selection
model.
International Journal of Sustainable Design 12/2012; 2(1).
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ABSTRACT: Surface roughness is an important parameter for ensuring that the dimension of geometry is within the permitted tolerance.
The ideal surface roughness is determined by the feed rate and the geometry of the tool. However, several uncontrollable factors
including work material factors, tool angle, and machine tool vibration, may also influence surface roughness. The objective
of this study was to compare the measured surface roughness (from experiment) to the theoretical surface roughness (from theoretical
calculation) and to investigate the surface roughness resulting from two types of insert, ‘C’ type and ‘T’ type. The experiment
was focused on the turning process, using a lathe machine Colchester 6000. The feed rate was varied within the recommended
feed rate range. We found that there were large deviations between the measured and theoretical surface roughness at a low
feed rate (0.05 mm/r) from the application of both inserts. A work material factor of AISI D2 steel that affects the chip
character is presumably responsible for this phenomenon. Interestingly, at a high feed rate (0.4 mm/r), the ‘C’ type insert
resulted in 40% lower roughness compared to the ‘T’ type due to the difference in insert geometry. This study shows that the
geometry of an insert may result in a different surface quality at a particular level of feed rate.
Key wordsSurface roughness-Turning-Insert geometry-Feed rate
CLC numberTG506
Journal of Zhejiang University - Science A: Applied Physics & Engineering 04/2012; 11(12):966-971. · 0.41 Impact Factor
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ABSTRACT: Automobiles are major transportation choice for society around the world. Automotive industries in many
countries mostly are one of the drivers of economic growth, job creation and technology advancement.
Although automotive industry gives promising return, problem of managing disposal at the end of
automotive’s life is quite challenging. Automobile is a very complex product that comprise of thousand
components made from various materials that need to be separately treated. In addition, short supply of
natural resources has provided opportunities to either reuse, remanufacture or recycle automotive’s
components. End of Life Vehicle (ELV) Directive launched by European Union mandated that recyclability
rate of automobile must reach 85% by 2015. The aim of this legislation is to minimize the impact of end of
life vehicle, contributing to prevention, preservation and improvement of environment quality and energy
conservation. Vehicle manufacturers and suppliers requested to include these aspects at earlier stages of the
development of new vehicles, in order to facilitate the treatment of vehicles at the time when they reach the
end of their life. Therefore, the automobile industry has to establish its voluntary action plan for ELVs, and
has numerical target to improve ELV recycling rate, reduce automotive shredder residue (ASR) landfill
volume, and reduce lead content. Many innovative approaches in improving recyclability have been
implemented, but still called out for more intelligent solutions which integrate recyclability evaluation in
product development stage. This paper attempts to review some of current innovative approach that used to
improve recyclability and introduce a framework for integrated recyclability tool to improve product
recyclability throughout its development phase.
The International Journal of Industrial Engineering: Theory, Applications and Practice 01/2012; 19(10). · 0.15 Impact Factor
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ABSTRACT: Malaysian manufacturers have long demonstrated a strong global market presence but that is
now threatened with growing pressures from tighter environmental regulations, stronger green consumerism
demand and decreasing natural resources due to the lack of implementation of sustainable manufacturing
practices. This paper attempts to investigate the current state of eco-design implementation and local
driving force in local Malaysian industry. The pilot study conducted through interview survey has shown
that the current state of implementation and awareness among local industry is fairly low. The soft
approach of the local legislation does not contribute much towards seeing a major change in attitude as
will be discuss further in the paper. The above two concerns are major challenges that requires immediate
attention. None the less there seem to be growing concerns from the industry and the government that
pushes the need for options that could leap frog the current situation. This present an opportunity for the
local research community to come up with various strategies that will be discussed. Finally the paper
would propose a more comprehensive strategy which is tailored to local business environment in order
for the local industry to be capable of maintaining its market presence.
Journal of Applied Sciences Research 01/2010;
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JACIII. 01/2010; 14:46-54.
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JACIII. 01/2008; 12:336-341.
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ABSTRACT: Manufacturing process are not considered in detail in (Life-Cycle Assessment) LCA. Recently, the environmental impact of machining in LCA is determined from the rough volume material removed or weight ratio of construction material only. In this study, LCA in machining process can be related to energy and design feature by a linkage called Life-Cycle Design (LCD). Specific Energy Consumption (SEC) from various combination of machining parameter can be used to evaluate machining process in detai l from design stage. Present study is an experimental study to get SEC from various combination of machining parameter. The focus of the experiment is turning process, with a combination of spindle speed, and feed rate setting. This data is useful in analysis of environmental impact in machining process at the design stage.
