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Abstract
Efficient material reutilization is a rational way to facilitate sustainable technology because it can promote conservation of resources and energy while decreasing the environmental loads at the same time. Recycling and remanufacturing are particularly important and involve product disassembly to retrieve the desired parts and/or subassemblies. To facilitate such a perspective in this paper, we have developed a prototype system supporting strategic decision-making on disassembly for recycling at the design stage of the product life cycle. Based on the information given at the design stage, it decides automatically the optimal disassembly sequence through a metaheuristic method known as Genetic Programming, and evaluates the disassembly plan quantitatively. Its implementation takes place by using Java programming language, and illustrative examples are provided to show validity of the system.
Notes
†We may classify the retrievable units into several categories for convenience of setup of the objective function, i.e. unit made of uniform material, complex unit, reusable complex unit, required treatment before disposal, part hard to destroy, disposable unit and so on. Meanwhile we consider five operations as the disassembly actions, i.e. no action (free), snap off, screw off, turn off, and cut off.
†Number appeared in the i-j element denotes disassembly action necessary to retrieve part i from part j.
†By preliminary numerical experiments, it is chosen as 0.5 in this study.