TY - GEN T1 - The elastic-plastic torsion problem : a posteriori error estimates for approximate solutions A1 - Bildhauer,Michael A1 - Fuchs,Martin A1 - Repin,Sergey Y1 - 2012/03/23 N2 - We consider the variational inequality, which describes the torsion problem for a long elasto-plastic bar. Using duality methods of the variational calculus, we derive a posteriori estimates of functional type that provide computable and guaranteed upper bounds of the energy norm of the difference between the exact solution and any function from the corresponding energy space that satisfies the Dirichlet boundary condition. CY - Saarbrücken PB - Universitäts- und Landesbibliothek AD - Postfach 151141, 66041 Saarbrücken UR - http://scidok.sulb.uni-saarland.de/volltexte/2012/4737 ER -