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<LI>  Display the next (2) or previous (3) view;
<LI>  Refresh (4) the screen;
<LI>  Zoom (5 or M) (designate the zoom zone by clicking or designating manually), or a zoom- (6);
<LI>  Produce a hardcopy (9) of the screen, or a softcopy (8) on another graphical terminal; having done this,
the user is returned to the initial state (of this <i> graphics</i> menu).
</UL>
<P>
<P>
<P>
We now give some details regarding the choices   possible as a function of the type of
visualization selected:
<P>
<DL COMPACT><DT>Mesh only:
<DD>  
<P>
This corresponds to the case described above (identical with respect to the possibilities offered
by preprocessor  <b> TRNOXX</b> for the two-dimensional case, to which the user is referred).
<P>
<P>
<P>
<DT>Stresses:
<DD>  
<P>
Activate key 10 and choose option 1. It is then necessary to enter the name of the file
containing D.S. <b> TAE</b> containing the stresses. The enlarged menu
(additional keys followed by an asterisk) is given below:
<P>
<PRE> ------------------------------------------------------------
 | 10 | PLOT TYPE                 |  MESH AND STRESSES
 ------------------------------------------------------------
 | 11 | DEVICE NUMBER             |       1
 ------------------------------------------------------------
 | 12 | PLOT TITLE                |
 ------------------------------------------------------------
 | 20 | D.S. MAIL TO PLOT         |  carre.mail1
 ------------------------------------------------------------
 | 20 | D.S. COOR TO PLOT         |  carre.coor1
 ------------------------------------------------------------
 | 21 | D.S. TAE USED             |  carre.taes
 ------------------------------------------------------------
 | 24 | LOAD CASE                 |       1
 ------------------------------------------------------------
 | 33 | CRITERION TO PLOT         |   PRINCIPAL STRESSES
 ------------------------------------------------------------
 | 28 | ARROW ENDS                |      -1
 ------------------------------------------------------------
 | 29 | BIGEST ARROW IN CM.       |     2.000000
 ------------------------------------------------------------
 | 31 | QUESTIONS ABOUT A D.S.    |   NO
 ------------------------------------------------------------
 | 30 | PLOT SIZE                 |  AUTO
 ------------------------------------------------------------
 | 40 | CHARACTER TYPE            |  HARD
 ------------------------------------------------------------
 | 50 | ITEMS TO PLOT             |  TRIANGULATION
 ------------------------------------------------------------
 | 60 | LEGEND                    |  YES
 ------------------------------------------------------------
 | 70 | NUMBER                    |  NONE
 ------------------------------------------------------------
 | 80 | LINE TYPE (MESH)          |  SOLID
 ------------------------------------------------------------
 | 80 | LINE TYPE (STRESSES)      |  SOLID
 ------------------------------------------------------------
</PRE>
<P>
A default value  is proposed for each option.
The above table lists the selections made automatically when plotting the stresses. Type 0 to
obtain the plot of the mesh.
<P>
A key (a number) and a status corresponds to each item. To modify the status, it suffices to type the
key and enter the values corresponding to the status desired  (see the general introduction).
The list of keys is given below:
<P>
<DL COMPACT><DT>Key 10:
<DD> the plot type: mesh and stresses (default value).
<DT>Key 11:
<DD> already seen.
<DT>Key 12:
<DD> already seen.
<DT>Key 20:
<DD> already seen.
<DT>Key 21*:
<DD> the name of the file containing the solution (D.S. <b> TAE</b>).
To change files, activate this key and enter the name of the new file to  be consider.
<DT>Key 24*:
<DD> the load case to consider (1 by default). This value must lie between
1 and NDSM, the total number of load cases  present in D.S. <b> TAE</b> (number equal to
to that of D.S. <b> B</b>  used to construct this structure.
<DT>Key 33*:
<DD> the stress visualization mode: principal stresses by default. This choice can be modified by
choosing between:
<PRE>    PRINCIPAL STRESSES            : 1
    TRESCA CRITERION              : 2
    VON MISES CRITERION           : 3
    VON-MISES PLASTIC ZONE        : 4
    DRUCKER-PRAGER PLASTIC ZONE   : 5 ?
</PRE>
<DT>Key 29*:
<DD> the maximum size of the arrows (2 cm by default). This value can be changed by activating
this key.
<DT>Key 28*:
<DD> the type of arrows. The manner in which the arrowheads are plotted can be
specified as follows:
<PRE>   EXTREMITY OPEN , NORMALISED : -1
   EXTREMITY CLOSED , NORMALISED  :  1
   EXTREMITY OPEN , FIXED      : -2
   EXTREMITY CLOSED , FIXED       :  2
</PRE>
The arrowhead is open (2 lines) or closed (a triangle), and its &quot;length&quot; is calculated as a function
of the size of the arrow (which is related to the velocity modulus)  or fixed (for all the arrows)
to a value specified by the user.
<DT>Key 31:
<DD> already seen.
<DT>Key 30:
<DD> already seen.
<DT>Key 40:
<DD> already seen.
<DT>Key 50:
<DD> already seen.
<DT>Key 60:
<DD> already seen.
<DT>Key 70:
<DD> already seen.
<P>
<DT>Key 80:
<DD>  the type of plot lines desired for the mesh and arrows:
solid (by default) or, by activating this key, the choice between:
<PRE>    SOLID      : 1  --   DOTTED    : 2
    DASHED     : 3  --   MIXED     : 4 ?
</PRE>
<P>
 </DL>
<P>
When visualizing a criterion (via key 33), it is plotted
by hatching (defined by key 27 with respect to the density), or in color.
<P>
<DL COMPACT><DT>Note:
<DD>  For a  Von-Mises or Tresca  criterion in the case of plane deformations, it is necessary
to know the  Poisson coefficient, <IMG BORDER=0 ALIGN=BOTTOM ALT="" SRC="img89.gif">, and the nature (isotropic, etc.) of the material, information which
is not stored in the D.S. Consequently, this information must be entered here via keys
42 and 43 which will appear in the general menu.
<P>
 </DL>
<P>
Once a plot is displayed on the screen, we have, as for all the other modules, a <em> graphics</em> menu
at our disposal to perform operations
 (0), (1), (2), (3), (4), (5 or M), (6), (8) and
(9) already described.
<P>
<DL COMPACT><DT>Example:
<DD> Two examples of two-dimensional meshes and the corresponding stresses obtained via
<b> TRSTXX</b>  are shown in  figures <A HREF="#figtrstre1">3.7</A> to <A HREF="#figtrstre3">3.9</A>. It corresponds to the
example of  test 2  in 2D elasticity with plane deformations described in [<A HREF="node109.html#guide1"><A NAME=tex2html331 HREF="../Guide1/welcome.html">MODULEF User Guide - 1</A></A>].
<P>
The plots were obtained by typing the following sequences:
<P>
<UL><LI> figure <A HREF="#figtrstre1">3.7</A> : -1 t2mail t2coor 10 1 t2taes 80 2 1 0
                       8 2 bw ncadre nlogo  x12 y12  ftrstre1 v
<LI> figure <A HREF="#figtrstre2">3.8</A> : -1 t2mail t2coor 10 1 t2taes  33 2 27 .75 0
                       8 2 bw ncadre nlogo  x12 y12  ftrstre2 v
<LI> figure <A HREF="#figtrstre3">3.9</A> : -1 t2mail t2coor 10 1 t2taes  33 2 0
                       8 2 ncadre nlogo  x12 y12  ftrstre3 v
</UL> 
 </DL>
<P>
<P><A NAME=2272>&#160;</A><IMG BORDER=0 ALIGN=BOTTOM ALT="" SRC="img90.gif">
<BR><STRONG>Figure 3.7:</STRONG> <i> Example <b> TRSTXX</b> 2D: mesh and principal stresses</i><A NAME=2270iExample2266bTRSTXXb22662Dmeshandprincipalstressesi2270>&#160;</A><BR>
<P>
<P>
<P><A NAME=2285>&#160;</A><IMG BORDER=0 ALIGN=BOTTOM ALT="" SRC="img91.gif">
<BR><STRONG>Figure 3.8:</STRONG> <i> Example <b> TRSTXX</b> 2D: mesh and stresses (Tresca's criterion)</i><A NAME=2283iExample2279bTRSTXXb22792DmeshandstressesTrescascriterioni2283>&#160;</A><BR>
<P>
<P>
<P><A NAME=2298>&#160;</A><IMG BORDER=0 ALIGN=BOTTOM ALT="" SRC="img92.gif">
<BR><STRONG>Figure 3.9:</STRONG> <i> Example <b> TRSTXX</b> 2D: stresses (Tresca's criterion) with shading</i><A NAME=2296iExample2292bTRSTXXb22922DstressesTrescascriterionwithshadingi2296>&#160;</A><BR>
<P>
<P>
<DT>Plastic zones:
<DD>  
<P>
In the case of an  elasticity problem, we return to the above case by choosing options 4 or 5 in key
33.  The user then needs to indicate, depending on the type of plasticity chosen, the values for
the plasticity threshold
(4) via key 43, or the frictional angle and cohesion coefficient (5) via key 43.
<P>
<P>
<P>
<DT>Temperatures:
<DD>  
<P>
Activate key  10 and choose option  2. It is then necessary to enter the name of the
file containing D.S. <b> TAE</b> containing the temperatures. The enlarged menu (additional keys indicated with
an asterisk) is given below:
<P>
<P>
<P>
<DT>Flux:
<DD>  
<P>
Activate key  10 and choose option  3. It is then necessary to enter the name of the
file containing D.S. <b> TAE</b> containing the flux. The enlarged menu (additional keys indicated with
an asterisk) is given below:
<P>
 </DL>
<P>
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