Nous étudions lʼhomogénéisation de problèmes du type :
(1) |
We study the homogenization of elasticity problems like (1) when f, g are strictly convex functions satisfying a growth condition of order , g is positively homogeneous of degree p, , and consists of an ε-periodic distribution of parallel fibers of cross sections of size . The problem (1) corresponds to a simplified model of small deformation nonlinear elasticity describing, for instance, the small deformations of an Ogdenʼs material (Ogden, 1972 [8]). When , it may also characterize the viscoplastic creep experienced, at high temperatures, by a metallic composite governed by the Norton–Hoff model (Friaâ, 1979 [7]). In this case, represents the velocity vector field. We show that if , a concentration of strain energy appears in a small region of space surrounding the fibers. This extra contribution is characterized by a local density of the sections of the fibers with respect to some appropriate capacity depending, if , on the angles of rotation of the fibers with respect to their principal axis. This rotating behavior generates, in parallel, the emergence of torsional strain energy within the fibers.
@article{CRMATH_2013__351_5-6_241_0, author = {Michel Bellieud}, title = {Probl\`emes capacitaires en viscoplasticit\'e avec effets de torsion}, journal = {Comptes Rendus. Math\'ematique}, pages = {241--245}, publisher = {Elsevier}, volume = {351}, number = {5-6}, year = {2013}, doi = {10.1016/j.crma.2013.03.005}, language = {fr}, }
Michel Bellieud. Problèmes capacitaires en viscoplasticité avec effets de torsion. Comptes Rendus. Mathématique, Volume 351 (2013) no. 5-6, pp. 241-245. doi : 10.1016/j.crma.2013.03.005. https://comptes-rendus.academie-sciences.fr/mathematique/articles/10.1016/j.crma.2013.03.005/
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Commentaires - Politique
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