Automatic Welding, 2018, №04



2018 №04 (08)

DOI of Article 10.15407/as2018.04.01

2018 №04 (02)

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Avtomaticheskaya Svarka (Automatic Welding), № 4, 2018, pp. 7-13

Stressed state of welded and brazed components from similar materials with a soft interlayer under axial loading

V.V. Kvasnitskii^1,3, V.F. Kvasnitskii², Dong Chunlin³, M.V. Matvienko², G.V. Ermolaev²

¹NTUU «Igor Sikorskii Kiev Polytechnic Institute». 37 Pobedi prosp., 03056, Kiev. E-mail: kvas69@ukr.net
²Admiral Makarov National University of Shipbuilding. 9 Heroev Ukrainy prosp., 54025, Nikolaev. E-mail: welding @nuos.edu.ua
³China-Ukraine E.O. Paton Institute of Welding. Guangzhou, P.R.China. E-mail: dchunlin@163.com
 

 
Computer modeling method was used to study the stressed state in components, manufactured by diffusion welding and brazing, under the impact of axial load. Cylindrical components from steel with a copper interlayer are considered under loading above the copper yield point. It is shown that formation of a complex stressed state resulted in the level of equivalent stresses decreasing in the interlayer compared to the applied axial load, and increasing in a small zone of base metal near the outer surface at the butt with the interlayer that causes the effect of strengthening (unloading) of the interlayer and softening (overloading) of base metal. Quantitative dependencies of the degree of interlayer strengthening and base metal softening on outer load magnitude were derived. It is found that at the elastoplasic stage of component loading base metal softening is less pronounced, than at the elastic stage. Degree of interlayer strengthening at the elastic stage of its work does not depend on the magnitude of outer load, and at the elastoplastic stage it is increased in proportion to the load. 9 Ref., 5 Fig.
 
Keywords: welded and brazed components, soft interlayer, computer modeling, stressed state, force loading
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