Falling Chimneys

Reynolds, Joseph B.

doi:10.1126/science.87.2252.186

Cited by 5 publications

(2 citation statements)

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“…The first analysis 22 of this problem compared the fall of the real chimney to the fall of the hinged stick, but wrongly identified the center of percussion (at about two thirds of the height) as the probable point of rupture. Reynolds 23 first identified the possible causes of the breaking with the shear forces and the bending moment originating within the structure of the toppling chimney. More detailed analyses were given by Bundy 20 and Madsen 24 (the most complete papers we found on the subject) while simplified explanations are also reported.…”

Section: Introductionmentioning

confidence: 99%

Toy models for the falling chimney

Varieschi

Kamiya

2003

American Journal of Physics

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In this paper we review the theory of the "falling chimney", which deals with the breaking in mid-air of tall structures, when they fall to the ground. We show that these ruptures can be caused by either shear forces, typically developing near the base, or by the bending of the structure, which is caused primarily by the internal bending moment.In the latter case the breaking is more likely to occur between one third and one half of the height of the chimney. Small scale toy models are used to reproduce the dynamics of the falling chimney. By examining photos taken during the fall of these models we test the adequacy of the outlined theory. This type of experiment, easy to perform and conceptually challenging, can become part of a rotational mechanics lab for undergraduate students.

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Section: Introductionmentioning

confidence: 99%

Toy models for the falling chimney

Varieschi

Kamiya

2003

American Journal of Physics

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“…There therefore have to be internal forces on the top of the meter stick to produce an acceleration greater than gravity. For brick chimneys these internal stresses are sufficient to cause the chimney to break well before it hits the ground, and this phenomenon has been the subject of extensive analysis [4][5][6][7][8][9][10][11][12][13][14], and so is not covered here.…”

Section: Introductionmentioning

confidence: 99%

The physics of falling chimney stacks

Hinrichsen¹

2021

Phys. Educ.

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The toppling motion of falling chimney stacks has been the subject of a number of studies which address the interesting phenomenon that brick chimneys usually break well before they hit the ground. Modern concrete chimneys, and wind generator towers, however, are strong enough to topple without breaking and many videos of their destruction are available on the web. Their angular motion can be investigated with 'Tracker', and then analysed in terms of the conservation of energy, of the applied torque, and of the angle as a function of time, all of which show good agreement with the video data.

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Pharmakotherapie

Birkmayer¹,

Winkler²

1951

Klinik Und Therapie Der Vegetativen Funktionsstörungen

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Falling Chimneys

Cited by 5 publications

References 1 publication

Toy models for the falling chimney

Toy models for the falling chimney

The physics of falling chimney stacks

Pharmakotherapie

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