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Abstract : To assess and attempt to curb the ever-increasing environmental impacts (EIs) of industrial products throughout their life cycle, eco- design solutions have been implemented and have evolved considerably during the last decade. A lot of research works have taken EIs into account in the early design stages. However, few studies have focused on the reduction of EIs in the final stages of design such as the detailed design phase of CAD (Computer Aided Design). This is probably due to the few possibilities of designers to practically act so as to reduce EIs of its product. However, the detailed design phase is a key step in the realization of eco-products. On the one hand, the choices made during this phase are responsible for generating more than 60% of EIs of a product throughout of its life cycle and, on the other hand, this phase embeds a large amount of information that allows accurate quantifications of EIs. The objective of this thesis is therefore to develop a new eco-design methodology aimed at reducing the EIs of a product during CAD phase. A general methodology is presented, which is based on the «ELA» process (Evaluate - Locate, Act). This methodology consists in, first, environmentally assessing a given geometry and, then, locating impactful sources for finally acting on target areas to result in an eco- designed geometry with an optimal life cycle scenario in terms of ecology. The geometry’s environmental evaluation is primarily based on the information linked to different assigned features. Therefore, eco-feature concept and the corresponding environmental assessment model based on the eco-features have been developed. This model allows the designer to evaluate in real time the environmental impacts of its geometric model with possible life scenarios by allowing him/her to locate the most influence parameters related to eco-features on the eco-design of its product. This model forms the first part of the «ELA» process, since it is necessary to act on the sources of impacts in order to achieve an eco-designed geometric model, once sources have been located. To that end, a model determining the degrees of freedom oriented eco-design is developed. This model forms the second part of the «ELA» process. A software platform named ELA Green-CAD has been developed based on these models.
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Raoudha Gaha. ECO-CONCEPTION ET CAO PARAMETRIQUE. Génie mécanique [physics.class-ph]. Ecole Nationale d'ingénieurs de Monastir (Tunisie), 2014. Français. ⟨tel-01822365⟩



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