Contact mechanism between dissimilar materials under plastic deformation

Salikhyanov, D. R.

doi:10.1016/j.crme.2019.07.002

Cited by 9 publications

(13 citation statements)

References 36 publications

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“…Application of slip lines theory to interacting wedges were recently proposed by Salikhyanov (2019). It was developed for contact cold welding of metallic plates which is somewhat close to the sealing process.…”

Section: Multiple Wedges Indentationmentioning

confidence: 99%

“…Such an approach was successfully used for single wedge indentation (Hill 1950b;Johnson 1987) and allows to highlight some interesting features, such as the relation between hardness and yield stress, the pile-up geometry or the wedge angle effect. From this point of view the work of Salikhyanov (2019) pointed out some interesting features in the framework of the interaction of two neighboring wedges through the interaction of two wedge indentation slip lines fields.…”

Section: Multiple Wedges Indentationmentioning

confidence: 99%

“…Therefore, the hardness becomes a function of the ratio of the contact length and the distance between the peaks. Only a few papers have dealt with such a problem since it requires an incremental approach to derive an analytical solution through the slip lines theory (Meguid et al 1977;Salikhyanov 2019). It is shown that two stages occur after the single wedge indentation stage.…”

Section: Introductionmentioning

confidence: 99%

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Wedge indentation of elastoplastic solids — from single indentation to interaction between indenters

Marthouret,

Zaouter,

Ledrappier

et al. 2024

Journal of Theoretical, Computational and Applied Mechanics

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Performance of metallic seals used between face-turned surfaces is related to their abilities to flow plastically in order to fill up cavities between wedge-shaped asperities. Double wedge indentation is therefore a simple way to investigate what happens at such a seal-flange interface. In this paper, finite element analyses of single and double wedge indentations are conducted. A particular attention is paid to the effects of hardening parameters on the resulting hardness. First, it is observed that single wedge indentation hardness can be well-approximated by the adaptation of analytic models initially developed for cone indentation problems. Second, it is shown that interaction between indentation-strain field during double wedge indentation starts once the bearing ratio is about 25%. It leads to a significant mean contact pressure increase, which is strongly dependent upon the strain hardening exponent. Eventually, for a bearing ratio higher than 75%, a plastic locking stage occurs, which leads to an exponential increase of the mean contact pressure. Practical applications of this work to indentation and sealing research fields are discussed.

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Section: Multiple Wedges Indentationmentioning

confidence: 99%

Section: Multiple Wedges Indentationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Wedge indentation of elastoplastic solids — from single indentation to interaction between indenters

Marthouret,

Zaouter,

Ledrappier

et al. 2024

Journal of Theoretical, Computational and Applied Mechanics

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“…decrease of the difference in strength properties between the hard material and the shell); -higher work hardening exponent n of the shell material (Y (stress) = K (material constant)•eps (true strain) ^ n); -decrease of rolling reductions; -decrease of the radius of the work rolls; -decrease of the relative thickness of the shell. b) Sandwich rolling of a package with large difference in strain resistance between hard-to-deform material and shell material causes shear stresses at the interlayer boundary [21,22,42,43,44]. Along with a large difference in the flow rates of materials and weak adhesion between them, shear stresses lead to delamination of the shell which makes further rolling impossible [23,45].…”

Section: Rolling Of Hard-to-deform Materials In Technological Shells:mentioning

confidence: 99%

Technological Shells in the Processes of Rolling Thin Sheets From Hard-To-Deform Materials

Каманцев²

2021

Preprint

Self Cite

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The present work is devoted to the study of deformability of high-strength and hard-to-deform materials. Today the most promising technology for their forming is a rolling in a ductile shell also known as sandwich rolling. Despite the fact that the use of such technological shells allows to effectively reduce the rolling forces and soften the stress state, they have not got wide application in manufacturing practice due to the accompanying disadvantages. On the basis of finite element (FE) simulation, we carried out an all-around analysis of the effect of shell material on process parameters of method: rolling force, total reduction of hard-to-deform material, deformation inhomogeneity and thickness variation of rolled sheet, stress state scheme. Analysis of computer models allowed us to highlight the main reason for the low efficiency of the known method and propose a new design of technological shells. Preliminary FE-simulation of the rolling process of hard-to-deform material in the new technological shells showed an improvement in process parameters and method efficiency. Approbation was carried out via rolling U12 high-carbon tool steel (Russian analogue of DIN C110W2 tool steel), which has low plasticity and high hardness, on the rolling mill Duo 250 under laboratory conditions. Evaluation according to technological criteria – reducing the rolling force, increase of the total reduction and the deformation uniformity of hard-to-deform material, improvement of its deformability – showed the prospects of using proposed technological shells in manufacturing practice.

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“…Thermal energy is released directly in the area of the connectable surfaces, cleaning the surfaces through arcing. Mechanical energy is implemented by an induction-dynamic drive through converging, cleaning by the impact and plastic deformation of the weld surfaces [12]. HCW can connect such components as rod-sheet, rod-rod, sheet-sheet, sheet-sphere and of other combinations.…”

Section: Research Proceduresmentioning

confidence: 99%

Analysis of thermodynamic processes under high-voltage condenser welding with inductive dynamic drive

Nescoromniy

Strizhakov

2020

E3S Web Conf.

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When obtaining fixed joints of different thickness from dissimilar materials, there arise difficulties associated with various thermophysical properties, and the likelihood of occurrence of intermetallic phases under chemical interaction. The use of super hard modes of thermodynamic effect during high-voltage condenser welding (HCW) provides localizing heat generation in the contact zone of the weld surfaces, activating the surface layers through converging the surfaces with the displacement of molten metal to the periphery of the contact zone and forming bonding in the solid phase.Recommendations are given for the use of technological methods of high-voltage capacitor welding depending on the combinations of welded alloys. A description of the nature and physical processes occurring at each technological reception is given.It is shown that the energy stored in the capacitor banks is spent on heat and power action. Variation of the mass of the induction - dynamic drive pusher and its inductance enables to adjust the ratio of thermal and mechanical components of the HCW process.The energy dispersion analysis of the experimental compounds obtained from dissimilar alloys confirms the absence of diffusion in high-voltage capacitor welding under super-rigid exposure modes.

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Contact mechanism between dissimilar materials under plastic deformation

Cited by 9 publications

References 36 publications

Wedge indentation of elastoplastic solids — from single indentation to interaction between indenters

Wedge indentation of elastoplastic solids — from single indentation to interaction between indenters

Technological Shells in the Processes of Rolling Thin Sheets From Hard-To-Deform Materials

Analysis of thermodynamic processes under high-voltage condenser welding with inductive dynamic drive

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