Shear band: Difference between revisions
No edit summary |
|||
| Line 13: | Line 13: | ||
== External links == |
== External links == |
||
* [http://www.metcer.ameslab.gov/movies/ind1_2_5_aalg.mov Ames Laboratory, US DOE, video of shear band formation.] |
* [http://www.metcer.ameslab.gov/movies/ind1_2_5_aalg.mov Ames Laboratory, US DOE, video of shear band formation.] |
||
* [http://http://www.ing.unitn.it/dims/ssmg,] |
|||
[[fr:Bande de cisaillement]] |
[[fr:Bande de cisaillement]] |
||
Revision as of 14:57, 20 August 2010
 |
A shear band is a lens-like region in which a large plastic shear has taken place, embedded in unsheared matrix.[1]
Shear bands are important in the understanding of failure mechanisms of brittle polymers at low temperatures (less than 80% of the glass transition temperature). Shear bands and crazes are considered to be internal flaws inside the polymer. The tensile strength of a polymer becomes independent of the length of the fracture. In other words, the polymer fails because of the flaws and not because of the cracks induced into the system when the size of the crack is very small.
The formation of shear bands is the key mechanism to explain failure in ductile materials, including metals and granular materials.[2] [3]
References
- ^ Extracted from Gibson L, Ashby M. (1997). Cellular solids Structure and properties - second edition. Cambridge Solid State Science Series. 510.
- ^ Rice, J. R. (1977) The localization of plastic deformation. In Koiter, W.T., ed., Theoretical and Applied Mechanics. Amsterdam, North-Holland. 207-220.
- ^ Bigoni, D. and Hueckel, T. (1991) Uniqueness and localization-I. Associative and non-associative elastoplasticity. International Journal of Solids and Structures 28, 197-213.
External links
 | This article about polymer science is a stub. You can help Wikipedia by expanding it. |