Computation of material forces based on a gradient-enhanced mixed variational formulation
Paper i proceeding, 2016

Configurational (or material) forces are computed based on a previously derived thermodynamically consistent definition of material forces, in conjunction with a gradient-enhanced constitutive theory. The primary problem solved for is based on a mixed variational formulation. Under the proposed mixed formulation, no nodal smoothing of internal variables for the computation of material forces is required at the post-processing. Results are shown in terms of energetic quantities which stem from the computed material forces. The mesh sensitivity of the latter quantities is examined and compared to respective results based on local constitutive theory in a "standard" displacements-based variational formulation.

Mixed variational formulation.

Gradient plasticity

Configurational forces

Författare

Dimosthenis Floros

Chalmers, Tillämpad mekanik, Material- och beräkningsmekanik

Fredrik Larsson

Chalmers, Tillämpad mekanik, Material- och beräkningsmekanik

Kenneth Runesson

Chalmers, Tillämpad mekanik, Material- och beräkningsmekanik

Proceedings of 29th Nordic Seminar on Computational Mechanics – NSCM29

Ämneskategorier

Teknisk mekanik