在abaqus中，如何在不选择对象的情况下输出每个时间点的最大应力值

Question

During the compression test, how to output the maximum stress value at each time point without selecting an object

Step&question I created a field output，MISESMAX maximum mises equivalent stress-submit this job-creat XY data-click ODB field output- select MISESMAX(i chorse intergration point in this part)then I save,but abaqus hint “At least one entity should be selscted”.

Goal I want to output Maximum stress value of each step in XY data,but the area of maximum stress value in each step will be different,so how to How to output XY value without selecting an area.

Answer 1

In order to create XY data , you must select the some or full part of the model. Hence the error from the Abaqus. I find this method is slow for your application.

Alternatively you can use below method:
In Abaqus/CAE: from Report menu -> select Field Output -> select appropriate Step/Frame -> select MISESMAX variable -> select position (If you want the nodal results then select Unique Nodal )-> In the setup tab check on Column Min/Max option.

Please note this writes the field output data to the file for ONE frame only. and at the end of the file you will get to see the max value and it's position (If the position you selected is Unique Nodal , the node label will be written.). Similarly, you can repeat this process for each frame of the step. or you can use following code:

import displayGroupOdbToolset as dgo
import odbAccess
odbName = 'example.odb'; outFile = 'example.dat'
odb = odbAccess.openOdb(path=nm)
session.viewports['Viewport: 1'].setValues(displayedObject=odb)
leaf = dgo.Leaf(leafType=DEFAULT_MODEL)
session.viewports['Viewport: 1'].odbDisplay.displayGroup.replace(leaf=leaf)
for stp in odb.steps.keys():
   tframe = len(odb.steps['Step-1'].frames)
   session.writeFieldReport(fileName=outFile, append=ON, 
       sortItem='Node Label', odb=odb, step=0, frame=1, outputPosition=NODAL, 
       variable=(('S', INTEGRATION_POINT, ((INVARIANT, 'Mises'), )), ))

Please change the argument to variable option in above code as per your field output data.