Energy loss by plastic deformation in radial compression of a cylindrical shell

Belan, V. G.; Durmanov, S. T.; Иванов, Ю А; Levashov, V. F.; Podkovyrov, V. L.

doi:10.1007/bf00910694

Cited by 3 publications

(1 citation statement)

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“…It is known that dynamical yield strength is not equal to a static one, as a rule. For example, the yield strength of metal at high-speed loading can exceed the static limit by several times [11][12][13]. Corresponding studies for nanopowders have not been conducted yet.…”

Section: Introductionmentioning

confidence: 99%

2D-simulation of Nanopowder High-Speed Compaction

Boltachev

Volkov

Spirin

et al. 2018

PSIJ

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The paper concerns the nanopowder high-speed, 10 4 -10 9 s -1 , compaction processes modelling by a two-dimensional granular dynamics method. Nanoparticles interaction, in addition to known contact laws, included dispersive attraction, the formation of a strong interparticle bonding (powder agglomeration) as well as the forces caused by viscous stresses in the contact region. For different densification rates, the "pressure vs. density" curves (densification curves) were calculated. Relaxation of the stresses after the compression stage was analysed as well. The densification curves analysis allowed us to suggest the dependence of compaction pressure as a function of strain rate. It was found that in contrast to the plastic flow of metals, where the yield strength is proportional to the logarithm of the strain rate, the power-law dependence of applied pressure on the strain rate as 1/4 p v  was established for the modelled nanosized powders.

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Section: Introductionmentioning

confidence: 99%