ISSN 2542–0380
Труды Института механики им. Р.Р. Мавлютова
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Proceedings of the Mavlyutov Institute of Mechanics

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Ilgamov M.A. Damage detection of a vertical bar Proceedings of the Institute of Mechanics of Ufa Branch of RAS. 5 (2007). 201–211.
2007. Vol. 5. Issue 1, Pp. 201–211
DOI: 10.21662/uim2007.1.024
Damage detection of a vertical bar
Ilgamov M.A.
Institute of Mechanics, Ufa


The article defines, both statically and dynamically, the location and size of a transverse notch on a vertical bar stretched by its own weight and the force applied at its lower end. Consideration is given only to the stress deformed state within the limits of elasticity for a thin bar. The notch simulates damages in the bar, among them the transverse open crack. Since the crack emerges as a result of the formation of a tiny nucleus, although not necessarily at the most stressed section, the notch is assumed to be in any place along the length of the bar.


drill bar,
vertical drill-bar string,
static stress deformed state,
forced and free longitudinal oscillations,
notch parameter,
notch coordinate