Mechanical APDL Structural Analysis Guide

17. Choose menu path Main Menu> TimeHist Postpro> Math Operations> Add. The Add Time-History
    Variables dialog box appears.


18. Enter 5 for the reference number for result, enter 3 as the 1st variable, and enter 4 as the 2nd variable.
    Click OK.This adds the elastic and plastic strains that you stored as variables 3 and 4.Their sum is the
    total strain, and it is stored as variable 5.

8.13.3.17. Plot Time-History Results

1. Choose menu path Main Menu> TimeHist Postpro> Settings> Graph. The Graph Settings dialog box
   appears.


2. Click on Single variable for the X-axis variable and enter 5 as the single variable number. Click OK.


3. Choose menu path Utility Menu> PlotCtrls> Style> Graphs> Modify Axes. The Axes Modifications for
   Graph Plots dialog box appears.


4. Enter Total Y-Strain as the X-axis label.


5. Enter Y-Stress as the Y-axis label. Click OK.


6. Choose menu path Main Menu> TimeHist Postpro> Graph Variables. The Graph Time-History Variables
   dialog box appears.


7. Enter 2 as the first variable to graph. Click OK.

8.13.3.18. Exit.

1. Choose QUIT from the Toolbar.


2. Click on the save option you want, and click on OK.

8.14. Example Nonlinear Analysis (Command or Bat ch Method)

You can perform the example nonlinear static analysis of a copper cylinder impacting a rigid wall using
the commands shown below instead of GUI choices. Items prefaced by an exclamation point (!) are
comments.

/filname,axplate

/prep7

radius=1.0! radius of the plate (m)

thick=0.1! thickness of plate (m)

ym=16911.23

et,1,plane182,,,1! plane182 axisymmetric element

mp,ex,1,ym

mp,nuxy,1,0.3

! define a kinematic hardening plasticity curve using the kinh material model

tb,kinh,1,1,5

! define the true stress vs. total log strain curve for this material model

! using 5 points. first point defines the elastic limit

tbpt,,0.001123514,19.00

tbpt,,0.001865643,22.80

tbpt,,0.002562402,25.08

tbpt,,0.004471788,29.07

Release 15.0 - © SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information

Example Nonlinear Analysis (Command or Batch Method)