| Autor: |
Peder Moller, Daniel Bonn |
| Přispěvatelé: |
Soft Matter (WZI, IoP, FNWI) |
| Jazyk: |
angličtina |
| Rok vydání: |
2007 |
| Předmět: |
|
| Zdroj: |
Europhysics Letters, 80(3):38002. IOP Publishing Ltd. |
| ISSN: |
0295-5075 |
| Popis: |
The strength of different wet granular materials is investigated as a function of the liquid volume fraction by measuring the elastic shear modulus, G'. We show that the optimum strength is achieved at a very low liquid volume fraction of 1–3%. Surprisingly we find that the macroscopic strength of different wet granular materials depends with a power of 2/3 on the microscopic elastic modulus of the individual grains, with a power of - 1/3 on the radius, and with a power of 1/3 on the surface tension. This can be explained by assuming that the attractive capillary force between two grains deforms the grains elastically, yielding a "spring constant" for further deformation. Averaging over many grain-grain orientations allows us to predict the macroscopic shear modulus in excellent agreement with our experiments. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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