KINETICS OF FORMATION OF ACTUAL CONTACT BETWEEN DISSIMILAR MATERIALS UNDER THERMAL STRAIN EFFECT DURING THE PERIOD OF ACTIVE LOADING

Valery Abramov, Yulia Zheglova

Abstract: The use of solid-phase interaction in solving design and engineering problems not only solves technological problems but is also more energy-efficient than other methods for producing precision detachable and permanent joints. It also preserves the original physical, mechanical, and chemical properties of materials in products. Previously proposed new approaches to studying the contact interaction of materials under thermal strain can address these issues. In this paper, the dependences of contact area on time for copper under thermal strain during the period of active loading or active strain were obtained for the first time. These dependences were obtained using correlation and regression analysis methods based on available experimental data. The results obtained in this paper (based on experimental research) can be used in the future as calculation formulas for determining the contact area as a function of time during the period of active loading between dissimilar materials (when a rough copper surface comes into contact with a harder, smoother surface), during thermal strain processes for producing precision detachable and permanent joints, and during welding of homogeneous and dissimilar combinations without changing their physical and mechanical properties. This will find wide application not only in high-tech industries but also in improving the reliability and performance of welded metal building structures.

Keywords: Contact interaction, Methodology, Plastic strain, Actual contact, Contact area, Copper, Corundum, Correlation and regression analysis, Welded building metal structures

DOI: 10.24874/PES08.02B.003

Recieved:   Revised:   Accepted:   
UDC:

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