ABAQUS Analysis User's Manual  

25.2.36 UPRESS
User subroutine to specify prescribed equivalent pressure stress conditions.

Product: ABAQUS/Standard  

References

Overview

User subroutine UPRESS:

  • allows you to prescribe equivalent pressure stress values at the nodes of a model;

  • will be called in a mass diffusion analysis whenever a current value of equivalent pressure stress is needed for a node that has user-defined pressure stress conditions;

  • can be used to modify any pressure stresses read in from a results file; and

  • ignores any equivalent pressure stresses provided for the associated pressure stress definition outside the user subroutine.

User subroutine interface

      SUBROUTINE UPRESS(PRESS,KSTEP,KINC,TIME,NODE,COORDS)
C
      INCLUDE 'ABA_PARAM.INC'
C
      DIMENSION TIME(2), COORDS(3)
C

      user coding to define PRESS

      RETURN
      END

Variable to be defined

PRESS

Total value of the equivalent pressure stress at the node.

You may have also requested equivalent pressure stress to be set in one of two other ways: from a previously generated results file or via direct data input. When PRESS is passed into user subroutine UPRESS, it will contain equivalent pressure stresses obtained from the results file only. You can modify these values within this routine. Any values given as direct data input will be ignored.

Variables passed in for information

KSTEP

Step number.

KINC

Increment number.

TIME(1)

Current value of step time.

TIME(2)

Current value of total time.

NODE

Node number.

COORDS

An array containing the coordinates of this node.

Example