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Modeling of disassembly processes of complex products

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The work is devoted to modeling the processes of disassembling complex products in CADsystems. The ability to dismantle a product in a given sequence is formed at the early design stages, and is implemented at the end of the life cycle. Therefore, modern CAD-systems should have tools for assessing the complexity of dismantling parts and assembly units of a product. A hypergraph model of the mechanical structure of the product is proposed. It is shown that the mathematical description of coherent and sequential disassembly operations is the normal cutting of the edge of the hypergraph. A theorem on the properties of normal cuts is proved. This theorem allows us to organize a simple recursive procedure for generating all cuts of the hypergraph. The set of all cuts is represented as an AND/OR-tree. The tree contains information about plans for disassembling the product and its parts. Mathematical descriptions of various types of disassembly processes are proposed: complete, incomplete, linear, nonlinear. It is shown that the decisive graph of the AND/OR-tree is a model of disassembling the product and all its components obtained in the process of dismantling. An important characteristic of the complexity of dismantling parts is considered — the depth of nesting. A method of effective calculation of the estimate from below has been developed for this characteristic.

Keywords: disassembly, computer-aided design system, mechanical structure, hypergraph, AND/OR-tree, disassembly sequence, disassembly complexity, disassembly modeling
Citation in English: Bozhko A.N. Modeling of disassembly processes of complex products // Computer Research and Modeling, 2022, vol. 14, no. 3, pp. 525-537
Citation in English: Bozhko A.N. Modeling of disassembly processes of complex products // Computer Research and Modeling, 2022, vol. 14, no. 3, pp. 525-537
DOI: 10.20537/2076-7633-2022-14-3-525-537

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International Interdisciplinary Conference "Mathematics. Computing. Education"