| Autor: |
Mora Santos, C. Alberto, Rivera Martínez, M. del R., Susarrey Huerta, Orlando, Balankin, A., Mendoza Nuñez, Maribel |
| Zdroj: |
Key Engineering Materials; September 2010, Vol. 449 Issue: 1 p23-28, 6p |
| Abstrakt: |
In this work the self-affine crack pattern in Filter Paper sheets is studied. This paper has a well-defined anisotropy of mechanical properties associated with visible preferable orientation of fibers in the machine direction. Fracture behavior is in essence brittle, the rupture lines have self-affine invariance, and the stresses ahead of the straight notch follow a power-law behavior. The roughness exponent value is of H = 0.50 0.01, different from the suggested universal value H = 0.8. The classical theory has demonstrated that, in materials such as metal, there is a relationship between the size and the starting crack stress, which does not happen in this material. The tests show that the starting crack stress from stress-strain behavior curves remains stable for the different specimen sizes w and crack length size. Moreover, different types of geometric groove, circular and linear, and without a crack, were tested and show almost the same behavior. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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