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<a name = "hj-top"> </a><table class = "table1" id = "table11"><tr><td><table class = "DocHeader"><tr><td class = "DocHeader1" colspan = "2"><h1>Minimizing the Maximum Equivalent Stress</h1></td></tr><tr><td class = "DocHeader4" colspan = "2"/></tr><tr><td class = "DocHeader3" colspan = "2"><table class = "DocThemeIntro" id = "table12"><tr><td class = "Intro1"><p class = "header"><p class = "abstract">
<span class = "shortdesc">
Probably the most used shape optimization type is a minimization
of the maximal von Mises stresses. This task is automated in <span class = "ph">SIMULIA Tosca Structure</span>
so that the user must not care about any reference values.
</span>

</p>
<p>This task shows you how to:
					</p><ul><li><a href = "#tso-t-usr-shape-staAna-minStress-gui" id = "toc_rg" title = "">
Minimize the Maximum Equivalent Stress in <span class = "ph">Tosca Structure.gui</span>
</a></li><li><a href = "#tso-t-usr-shape-staAna-minStress-cmd" id = "toc_rg" title = "">
<span class = "ph">SIMULIA Tosca Structure</span>
Parameter File
</a></li></ul>
</p></td></tr><tr><td class = "Intro2"><hr class = "header"/><span class = "run-in-beforeyoubegin">Before you begin: </span>
<p>
If the default settings cause the geometry to change unwanted in size
a volume constraint can be utilized. 
</p>
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<div class = "p"><!--xxx--></div>

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<article class = "topic task nested1" aria-labelledby = "ariaid-title2" id = "tso-t-usr-shape-staAna-minStress-gui">
<h2 class = "title topictitle2">
Minimize the Maximum Equivalent Stress in <span class = "ph">Tosca Structure.gui</span>
</h2>

<div class = "body taskbody">
<section><ol class = "ol steps"><li class = "li step stepexpand">

Choose <span class = "ph uicontrol">Command &gt;</span>  <span class = "ph uicontrol">DRESP</span>.

<div class = "itemgroup stepresult">The DRESP menu appears.</div>
</li><li class = "li step stepexpand">

Set <span class = "ph uicontrol">Type = SIG_MISES</span> as shown in the following figure:
<br/><img class = "image" id = "tso-t-usr-shape-staAna-minStress-gui__image_33606B966FAE4384967354418D99BF2C" src = "../TsoUserImages/shape_equiv_stress_gui.png" width = "450"/><br/>

</li><li class = "li step stepexpand">

Choose <span class = "ph menucascade"><span class = "ph uicontrol">Command</span><abbr title = "and then"> &gt; </abbr><span class = "ph uicontrol">OBJ_FUNC</span></span>.

<div class = "itemgroup stepresult">The OBJ_FUNC menu appears.</div>
</li><li class = "li step stepexpand">

Select <span class = "ph uicontrol">Target= MinMax</span>.

</li><li class = "li step stepexpand">

Set <span class = "ph uicontrol">RefValue</span> to 120.<br/><img class = "image" id = "tso-t-usr-shape-staAna-minStress-gui__image_6C0281B3C32641589DFE06081778D174" src = "../TsoUserImages/shape_obj_func_minmax_gui.png" width = "450"/><br/>

</li></ol></section>
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</article>

<article class = "topic task nested1" aria-labelledby = "ariaid-title3" id = "tso-t-usr-shape-staAna-minStress-cmd">
<p><map name = "FPMap1"><area href = "#hj-top" title = "Back to Top" shape = "rect" coords = "416, 0, 435, 10"/></map><span class = "itemsprite"/></p><h2 class = "title topictitle2">
<span class = "ph">SIMULIA Tosca Structure</span>
Parameter File
</h2>

<div class = "body taskbody">
<section><div class = "li step p">
The resulting command in the parameter file look like follows:
<p>

<pre class = "codeblock">
<code class = "ph codeph">
DRESP
 ID_NAME        = DRESP_VON_MISES
 DEF_TYPE       = SYSTEM
 TYPE           = SIG_MISES
 ND_GROUP       = design_nodes
 LC_SET         = ALL,1,All
 LC_SET         = ALL,2,All
 GROUP_OPER     = Max
END_

OBJ_FUNC
 ID_NAME        = MY_OBJ_FUNC
 TARGET         = MINMAX
 DRESP          = DRESP_VON_MISES, ,
END_
</code>
</pre>
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