Space discretization, time discretization

The computational domain is divided into finite elements. The elements connect at nodes. Either one-dimensional (1D), two-dimensional (2D), three-dimensional (3D) or axi-symmetrical (2D) domains can be used.

Only first order in time equations are solved. Time derivatives are approximated with Euler backward time discretization.

Tochnog professional can store strains, stresses etc. either in element integration points (jumps between elements possible) or in nodes (continuous fields between elements); see global_element_dof_apply.