Sat, 26 Jul 2008 06:28:37 BST CiteULike: dchen's Marmottant http://www.citeulike.org/user/dchen/author/Marmottant CiteULike.org en-gb Copyright © 2004-2008 citeulike.org http://www.citeulike.org/user/dchen/article/2685826 <i>The European Physical Journal E - Soft Matter, Vol. 23, No. 4. (2007), pp. 337-347.</i><br /><br />Abstract.  We suggest a scalar model for deformation and flow of an amorphous material such as a foam or an emulsion. To describe elastic, plastic and viscous behaviours, we use three scalar variables: elastic deformation, plastic deformation rate and total deformation rate; and three material-specific parameters: shear modulus, yield deformation and viscosity. We obtain equations valid for different types of deformations and flows slower than the relaxation rate towards mechanical equilibrium. In particular, they are valid both in transient or steady flow regimes, even at large elastic deformation. We discuss why viscosity can be relevant even in this slow shear (often called “quasi-static”) limit. Predictions of the storage and loss moduli agree with the experimental literature, and explain with simple arguments the non-linear large amplitude trends. An elastic, plastic, viscous model for slow shear of a liquid foam P Marmottant F Graner doi:10.1140/epje/i2006-10193-x The European Physical Journal E - Soft Matter, Vol. 23, No. 4. (2007), pp. 337-347. 2008-04-18T01:30:45-00:00 2007 The European Physical Journal E - Soft Matter 23 4 337 347 2007 foam shear theory