Understanding the coupled thermo-mechanical behaviour of compacted granular beds can benefit various industrial applications, such as pebble bed design in fusion reactors. In this study, a discrete element method based on our previous work is improved and adapted to investigate cyclic performance gas-filled materials composed elastoplastic grains. An interparticle contact model developed consid...

The quasicontinuum method is a multiscale that combines locally supported coarse-grained domains, with small regions in which the microstructural model fully resolved. This contribution proposes first adaptive formulation of for elastoplasticity. uses an elastoplastic beam description. indicator refinement occurrence plastic deformation, such plasticity can only occur resolved regions. An illus...

In this article an “hyper-reduced” scheme for the Crisfield’s algorithm (Crisfield, 1981) applied to buckling simulations and plastic instabilities is presented. The two linear systems ellipse equation entering are projected on a reduced space solved in integration domain, resulting system of equations. Use made Gappy proper orthogonal decomposition recover stresses outside domain. Various meth...