Deformation Phenomena in the Collapse of Metallic Cylindrical Shells. Buckling

Zel’dovich, V. I.; Frolova, N. Yu.; Kheifets, A. E.; Khomskaya, I. V.; Degtyarev, A. A.; Шорохов, Е. В.; Смирнов, Е. Б.; Dolgikh, S. M.; Koval, A. V.

doi:10.1134/s0010508219040129

Cited by 6 publications

(1 citation statement)

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“…The loading was carried out by a sliding detonation wave, which generated a shock wave in the sample. This scheme is widely used to study strain localization [15] during the collapse of cylindrical shells [16]. The approach of the shock wave to the axis of at the unloading stage and spreads in the form of a spall crack transforming into the LSBs in the already "milled" material.…”

Section: A) Materials and Methodsmentioning

confidence: 99%

Damageability of Metals under Impulse Loading

Buravova

2024

GJSFR

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Impulse loading of a sample of limited dimensions (at least two free surfaces) leads to the oscillation of the sample in the standing wave mode as a consequence of wave reflection from the faces and their interaction with each other. Localized strain bands originate and evolve at the standing wave nodes (wave interference zone), where the deformation of the material occurs in the compression-tension mode and the stress in the wave interference zone does not exceed the spall strength of the material. (Excessive stress leads to the formation of spall cracks and sample destruction). As a result of the absence of energy transfer through the nodal points,which is typical of standing waves, the deformation of the sample can last for a long time after passing a shock wave until dissipative processes would bring about oscillatory process damping. Another characteristic feature of standing waves is the formation of new harmonics with their own wavelengths and vibration eigen frequencies with new spall damage occurring at each node.

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Section: A) Materials and Methodsmentioning

confidence: 99%