A static step is used when inertia affects can be neglected and when the analysis can be linear or nonlinear. Additionally, a static step ignores time-dependent material effects (creep, swelling, viscoelasticity) but takes rate dependent plasticity and hysteric behavior for hyperalastic materials into account. Time PeriodDuring a static step you assign a time period to the analysis. This is necessary for cross-references to the amplitude options, which can be used to determine the variation of loads and other externally prescribed parameters during a step (see Amplitude Curves). In some cases this time scale is quite real—for example, the response might be caused by temperatures varying with time based on a previous transient heat transfer run; or the material response might be rate dependent (rate-dependent plasticity), so that a natural time scale exists. Other cases do not have such a natural time scale; for example, when a vessel is pressurized up to limit load with rate-independent material response. If you do not specify a time period,Abaqus/Standard defaults to a time period in which “time” varies from 0.0 to 1.0 over the step. The “time” increments are then simply fractions of the total period of the step. | ||||||