Effect of the Rigid Interlayer Thickness on the Stress-Strain State of Metal-Graphite Assemblies Under Thermal Loading
- 16 Downloads
The effect of the rigid interlayer thickness on the stress-strain state of the assemblies from dissimilar materials on their diffusion welding and brazing was evaluated. Computer simulation was used to solve the axisymmetric elastoplastic problem for rapid assembly cooling after welding. Stress fields and epures were compared at different interlayer thicknesses and in its absence. All stresses in the assembly were established to concentrate in the immediate vicinity of the material-interlayer butt joint. Stress field patterns in the joined materials do not greatly change with interlayer thickness variations, however, stress levels are changing. With an increase in the interlayer thickness, the maximum point of tensile stresses in graphite is gradually moving away from the butt joint, and its value decreases. For reducing the risk of graphite fracture after assembly cooling, it would be appropriate to use a rigid interlayer no less than 1 mm thick.
Keywordsdiffusion welding stress-strain state dissimilar materials computer simulation plastic strain rigid interlayer cylinder-cylinder assembly
- 2.G. V. Ermolaev, V. V. Kvasnyts’kyi, V. F. Kvasnyts’kyi, et al., Brazing of Materials [in Ukrainian], MUK, Mykolaiv (2015).Google Scholar
- 3.V. I. Makhnenko, V. V. Kvasnitskii, and G. V. Ermolaev, “Effect of physicomechanical properties of joined metals and geometry of components on the distribution of stresses on diffusion welding,” Avtomat. Svarka, No. 1, 5–11 (2008).Google Scholar
- 4.G. V. Ermolaev, A. V. Labartkava, D. Ya. Andreev, and M. A. Tatarenko, “Computer simulation studies on the stress state of a brazed copper-graphite beam,” Visn. MUK, No. 3 (2010), http://evn.nuos.edu.ua.
- 5.V. V. Kvasnitskii, G. V. Ermolaev, and M. V. Matvienko, “Effect of cooling conditions after diffusion welding and brazing on residual stresses in edge graphite-copper joints,” Avtomat. Svarka, No. 11, 25–31 (2015). 428Google Scholar