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Tip 1 - How to run a ABAQUS job which uses a user subroutine?
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Using the following command :
abaqus job=job-id user= < subroutine-filename > |
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For the Linux Teaching System Computers give the extension .f and for PCs give the extension .for. The user subroutine has to be in a separate file (say my_material.f). Example : abq681 j=plate user=my_material If there are more than 1 user subroutines then all the subroutines must be included in a single file. If using CAE then in the Job Create a Job and then click on the General tab and click on the browse button for user subroutine and choose the file containing the user subroutine and Click on OK in the browse window and also in the dialog box. Then submit the job.
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Tip 2 - How to change the current settings of the environment variables?
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Create a file called abaqus_v6.env in the directory from which ABAQUS is run which contains lines of environment variables you want to change set equal to new values. However make sure that the computer on which you are running ABAQUS can support the changes. For example you can increase the memory used by ABAQUS. But you cannot increase this beyond what is available in the computer. Example : Include the following lines in the abaqus_v6.env file to increase the size of pre_memory and the standard_memory used by ABAQUS. For earlier versions of ABAQUS :
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pre_memory="400 mb"
standard_memory="500 mb"
If running ABAQUS on a PC then make these to the system copy which will be in the ABAQUS installation directory :
C:ABAQUS6.8-1siteabaqus_v6.env
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Tip 3 - How do I apply a centrifugal loading?
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Define the element set to be subjected to the centrifugal loading. The magnitude is calculated as density multiplied by the square of the angular velocity (in radians/second). For axisymmetric problems the axis of rotation must be the global Z-axis, which must be specified as 0.0, 0.0, 0.0, 0.0, 1.0, 0.0.
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*DLOAD PLATE, CENT, 225., 0.0, 0.0, 0.0, 0.0, 1.0, 0.0
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The value of 225 is arrived at from a density value of 9 multiplied by the square of the angular velocity of 5 radians/sec.
If using ABAQUS/CAE select module Load and click on the Create load icon. In the new form selectRotational Body force and click onContinue…. In the viewport area click on the region to be subjected to the Centrifugal force and then click on Done. ABAQUS/CAE will prompt for 2 points to define the axis of rotation. In the dialogue box select the toggle switch for Centrifugal for ther Load effect . Enter the value for Angular velocity and click on OK. If the amplitude of the loading is not the default Ramp then click on create and choose the appropriate amplitude from the selection available and click on OK.
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Tip 4 - How to identify the nodes with warning messages in a completed analysis?
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Select the Module Visualization and click on the Display Group icon. In the new dialogue box choose the Nodes in the LHS list and this will list the various categories of Nodes including the Nodes with Warnings associated with them. Tick the box to highlight and select the nodes with warning and these will be highlighted in Red.
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