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2019 №08 (07) DOI of Article
10.15407/tpwj2019.08.01
2019 №08 (02)

The Paton Welding Journal 2019 #08
TPWJ, 2019, #8, 2-6 pages
 
Journal                    The Paton Welding Journal
Publisher                 International Association «Welding»
ISSN                      0957-798X (print)
Issue                       #8, 2019 (September)
Pages                      2-6

Stress-strain state of welded and brazed assemblies of dissimilar materials with soft interlayer at temperature-force loading

V.V. Kvasnytskyi1, M.V. Matviienko2, E.A. Buturlya2, V.F. Kvasnytskyi2 and G.V. Yermolayev2
1National Technical University of Ukraine «Igor Sikorsky Kyiv Polytechnic Institute» 37 Peremohy Prosp., 03056, Kyiv, Ukraine. E-mail: kvas69@ukr.net
2Admiral Makarov National University of Shipbuilding 9 Geroiv Ukrainy Prosp., 54025, Mykolaiv, Ukraine

There was researched a stress-strain state (SSS) at temperature-force loading of cylinder assemblies of materials of similar strength, but different by temperature coefficients of linear expansion (TCLE), with soft (lower yield limit than in base metal) interlayer and average temperature coefficient of linear expansion. Fields and distribution diagrams of stresses and plastic deformations of assemblies were analyzed. Investigation of SSS showed that effect of mutual temperature (cooling) and force (compression) loading of assemblies with soft interlayers appears in increase of radial and circumferential stresses in both materials, increase of equivalent ones in the material with high TCLE and the interlayer and axial ones in the joined materials, and, respectively, decrease of equivalent in the material with lower TCLE. Tangential stresses at that remain virtually the same as at purely temperature loading. In change of cooling by heating the materials change their places. The value of maximum plastic deformations in the interlayer material at interface with base material close to external surface at mutual temperature-force loading reaches 2.3 %. At that, axial tension stresses in brittle materials with low TCLE (ceramics, graphite, etc.) during cooling in the assemblies with soft interlayer reduce by value of compression external stresses, i.e. risk of brittle fracture reduces. 7 Ref., 8 Figures.
Keywords: diffusion welding, brazing, dissimilar materials, soft interlayer, stresses, deformation, computer modelling, mutual temperature and force loading
 
 
Received:                08.05.19
Published:               24.09.19
 
 

References

1. Lobanov, L.M., Kvasnytskyi, V.V. et al. (2016) Stresses and strains in welding and brazing: Manual. Ed. by L.M. Lobanov. Mukolaiv, NUK [in Ukrainian].
2. Kvasnytskyi, V.V., Yermolayev, H.V., Matviienko, M.V. (2017) Mechanics of joints in diffusion welding, brazing and spraying of dissimilar materials under elasticity conditions. Ed. by H.V.Yermolayev. Nikolaev, NUK [in Russian].
3. Makhnenko, V.I. (2006) Service life of welded joints and assemblies of modern structures. Kiev, Naukova Dumka [in Russian].
4. Makhnenko, V.I., Kvasnitsky, V.F. (2006) Stress-strain state of assemblies of cylindrical shape in diffusion bonding. The Paton Welding J., 2, 2-7.
5. Ermolaev, G.V., Martynenko, V.A., Olekseenko, S.V. et al. (2017) Effect of the rigid interlayer thickness on the stress-strain state of metal-graphite assemblies under thermal loading. Strength of Materials, 49, 422-428. https://doi.org/10.1007/s11223-017-9882-4
6. Kvasnytskyi, V.V., Kvasnytskyi, V.F., Dong Chunlin et al. (2018) Stressed state of welded and brazed assemblies from similar materials with a soft interlayer under axial loading. The Paton Welding J., 4, 6-10. https://doi.org/10.15407/tpwj2018.04.01
7. Kvasnytskyi, V.V., Kvasnytskyi, V.F., Matviienko, M.V. et al. (2019) Stress-strain state of welded and brazed assemblies from dissimilar materials with soft interlayer at thermal loading. Ibid., 5, 13-17. https://doi.org/10.15407/tpwj2019.05.02
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