Import ANSYS File: Load Step Options

Description

ANSYS uses ISTRESS to specify initial stress values for beam, plate and brick elements. Straus7 assigns the initial stress values as beam pre-tension, plate pre-stress and brick pre-stress attributes. ISTRESS is a SOLU specific command supported by the Batch format.

ANSYS uses TREF to define the reference temperature. Straus7 assigns the reference temperature to the current primary load case.

ANSYS uses LSWRITE to write all current load step dependent data to a file. Straus7 defines a new load case/freedom case pair and copies all load case/freedom case dependent attributes from the previous load case and freedom case to the new load case and freedom case.

ANSYS uses LSCLEAR to clear all current load step data. Valid data labels include FE, INER, LFACT, LSOPT and ALL. Straus7 deletes all current load case and freedom case dependent attributes according to the selected data label.

Load Steps

An ANSYS load step is a combination of a load case and freedom case as defined within Straus7. When importing an ANSYS file, Straus7 creates a new load/freedom case pair to which all load case and freedom case dependent attributes are assigned prior to an instance of the LSWRITE command. Straus7 creates new load/freedom case pairs with the default title "ANSYS Load/Freedom Case N" for the load case and corresponding freedom case.

Initial Stresses

Initial stresses specified using the ISTRESS command are not load case dependent. Straus7 assigns the initial stress values using the beam pre-tension, plate pre-stress and brick pre-stress attributes to all imported load cases. Straus7 supports the first three stress components only from the ISTRESS command.