StaticStructural nsteps #(in)
[deltat #(...)]
[prescribedtimes #(...)]
[stiffmode #(...)]
[nonlocalext #(...)]
[sparselinsolverparams #(...)]

Static structural analysis. Can be used to solve linear and nonlinear static structural problems, supporting changes in boundary conditions (applied load and supports). The problem can be solved under direct load or displacement control, indirect control, or by their arbitrary combination. Note, that the individual solution steps are used to describe the history of applied incremental loading. The load cases are not supported, for each load case the new analysis has to be performed. To analyze linear static problem with multiple load combinations, please use LinearStatic solver.

By default all material nonlinearities will be taken into account, geometrical not. To include geometrically nonlinear effect one must specify level of non-linearity in element records.

The sparselinsolverparams parameter describes the sparse linear solver attributes and is explained in section 5.1. Can be used in parallel mode. The input record must be the same for all processors. At present, parallel version requires PETSc module. The optional parameter deltat defines the length of time step (equal to 1.0 by default). The times corresponding to individual solution times can be specified using optional parameter prescribedtimes, allowing to input array of discrete solution times, the number of solution steps is then equal to the size of this array. The nonlocalext turns on the nonlocal constitutive extension. The extension considers a band of remote elements involved in computation of nonlocal variables (see fig. 6.7 illustrating this approach for node-cut partitioning).

Borek Patzak