Learning Forum

[fuadahmed87]

i want to kill element in ansys apdl . i performed these steps but unfortunately couldn't perform this .

1.Utility Menu > File > Change Title

2.ANSYS Main Menu > Preprocessor>Modeling > Create > Areas > Rectangle > By 2 Corners

3.Preprocessor > Element Type > Add/Edit/Delete>PLANE55 (Thermal Solid, Quad 4node 55)

4.Define Element Material Properties

5.Mesh the frame

6.Solution > Analysis Type > New Analysis > Transient

7.type NROPT,FULL into the commmand line

8.Solution > Analysis Type > Sol'n Controls

A) Set Time at end of loadstep to 60 and Automatic time stepping to OFF

B)Set Number of substeps to 20.

C) Set the Frequency to Write every substep.

NonLinear tab 

D) Set Line search to ON .

E) Set the Maximum number of iterations to 100.

9.Solution > Define Loads > Apply > Initial Condit'n > Define > Pick All

set the initial temperature of the material to 268 K

10.Apply Boundary Conditions

Solution > Define Loads > Apply > Thermal > Convection > On Lines > Pick All

a film coefficient of 10 and a bulk temperature of 368.

11.Solution > Solve > Current LS

12.From the General Postprocessor menu select Element Table > Define Table>add>with a title Melty and select DOF solution > Temperature TEMP and click OK.

13.Utility Menu > Select > Entities>select Elements > By Results > From Full and click OK

14.Ensure the element table Melty is selected and enter a VMIN value of 273 

15.Solution > Analysis Type > Restart > OK

16.ekill,all into the command line

17.Utility Menu > Select > Entities>Elements > Live Elem's > Unselect and click Sele All.

18.General Postproc > Plot Results > Contour Plot > Nodal Solu > DOF solution > Temperature

TEMP

[dlooman]

It seems strange to do a restart with only part of the model selected. The restart resumes file.rdb which is written at the start of the first solution. The whole model is selected in file.rdb, so the ekill command is killing all the elements. It's also odd to expect to display results on dead elements. A restart may not be required. It is possible to select nodes by temperature without leaving solution (may need to use shared memory parallel, not distributed.) So steps 13 through 16 could be replaced with nsel,s,temp,,273, 300 ... esln,s,1 ... ekill,all