Indentations of plastic layers
46 mins 1 sec,
84.18 MB,
MP3
44100 Hz,
249.75 kbits/sec
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About this item
| Description: |
Balmforth, N
Tuesday 19th September 2017 - 09:00 to 09:40 |
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| Created: | 2017-09-20 14:15 |
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| Collection: | Growth form and self-organisation |
| Publisher: | Isaac Newton Institute |
| Copyright: | Balmforth, N |
| Language: | eng (English) |
| Distribution: |
World
(downloadable)
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| Explicit content: | No |
| Aspect Ratio: | 16:9 |
| Screencast: | No |
| Bumper: | UCS Default |
| Trailer: | UCS Default |
| Abstract: | The indentation of a layer of plastic material by a solid object is a classical problem in plasticity theory. Using the method of sliplines (characteristics) Prandtl provided two key solutions suitable for the indentation of either a relatively shallow or deep layer by a flat plate. In this talk I will summarize how both solutions, and their generalizations, apply in three rather different problems:
1) locomotion through a yield-stress fluid (the viscoplastic version of Taylor's 1951 viscous problem), 2) the formation of footprints, and 3) the washboarding instability of a towed plate above a deformable layer |
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