Mechanical APDL Basic Analysis Guide

The SMIN command (Main Menu> General Postproc> Element Table> Find Minimum) compares

and stores the minimum of two columns.

The SMULT command (Main Menu> General Postproc> Element Table> Multiply) multiplies two

specified columns in the element table.

The SSUM command (Main Menu> General Postproc> Element Table> Sum of Each Item) calculates

and prints the sum of each element table column.

The TALLOW command (Main Menu> General Postproc> Safety Factor> Allowable Strs> Reset

Temps or Main Menu> General Postproc> Safety Factor> Allowable Strs> Temp-depend) defines

the temperature table for safety factor calculations.

The VCROSS command (Main Menu> General Postproc> Element Table> Cross Product) calculates

the cross product of two vectors stored in the element table.

The VDOT command (Main Menu> General Postproc> Element Table> Dot Product) calculates

the dot product of two vectors stored in the element table.

7.3.3. Creating and Combining Load Cases

In a typical postprocessing session, you read one set of data (load step 1 data, for instance) into the
database and process it. Each time you store a new set of data, POST1 clears the results portion of the
database and then brings in the new results data. If you want to perform operations between two entire
sets of results data (such as comparing and storing the maximum of two sets), you need to create load
cases.

A load case is a set of results data that has been assigned an arbitrary reference number. For instance,
you can define the set of results at load step 2, substep 5 as load case number 1, the set of results at
time = 9.32 as load case number 2, and so on.You can define up to 99 load cases, but you can store
only one load case in the database at a time.

Note

You can define a load case at any arbitrary time by using the SET command (to specify the

time argument) and then using LCWRITE to create that load case file. The values will be a

linear interpolation of the results already available before and after your specified time.

A load case combination is an operation between load cases, typically between the load case currently
in the database and a load case on a separat e results file (or on the load case file, explained later). The
outcome of the operation overwrites the results portion of the database, which permits you to display
and list the load case combination.

A typical load case combination involves the following steps:

1. Define load cases using the LCDEF command (Main Menu> General Postproc> Load Case> Create
   Load Case).


2. Read one of the load cases into the database using the LCASE command (Main Menu> General
   Postproc> Load Case> Read Load Case).


3. Perform the desired operation using the LCOPER command (Main Menu> General Postproc> Load
   Case> operation).

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Additional POST1 Postprocessing