The Heuristic Model Based on LPR in the Context of Material Conversion

Abstract

High complexity of the physical and chemical processes occurring in liquid metal is the reason why it is so difficult, impossible even sometimes, to make analytical models of these phenomena. In this situation, the use of heuristic models based on the experimental data and experience of technicians is fully justified since, in an approximate manner at least, they allow predicting the mechanical properties of the metal manufactured under given process conditions. The study presents a methodology applicable in the design of a heuristic model based on the formalism of the logic of plausible reasoning (LPR).The problem under consideration consists in finding a technological variant of the process that will give the desired product parameters while minimizing the cost of production.The conducted tests have shown the effectiveness of the proposed approach.

Archives of Metallurgy and Materials

“…the material and technological conversion is related to the change of the material used for the production of the selected 1 aGh university of science anD technoloGy, faculty of Metals enGineerinG anD inDustrial coMPuter science, al. MickieWicza 30, 30-059 krakóW, PolanD metal element, the change of the production technology used (for example, replacement of the forging technology with the casting technology, which requires structural changes in relation to a given element (new design, new material) [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. introducing changes is related to keeping the required technological parameters (mechanical properties), economic factors (striving to reduce the production cost of the selected element), weight (reducing the weight of the element, which reduces the cost of its production, and consequently, if it is an element used in the production of cars, this will have the effect of reducing the overall weight of the car and reducing fuel consumption).…”

“…in this situation, the decision problem faced by the designer of a specific product (machine part) consists in the selection of material and its production technology, which ensure the fulfillment of specific technical requirements, while allowing the minimalization of production costs. in the work [6], the data allowing to compare the group of group of castings made of ausferritic ductile iron (aDi) with other technologies and materials used for their production were summarized. these data were taken as the basis for the creation of a knowledge base expressed in terms of reliable reasoning logic (lPr), taking into account the knowledge obtained from experts.…”