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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>General Information about Topology Optimization</h1></td></tr><tr><td class = "DocHeader4" colspan = "2"/></tr><tr><td class = "DocHeader3" colspan = "2"><table class = "DocThemeIntro" id = "table12"><tr><td class = "Intro1Only"><p class = "header"><p class = "abstract">
<span class = "shortdesc">Topology optimization is a tool to generate a new design proposal
and is often used within the concept phase for determining a new conceptual
design for a component.</span>

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<p>The following figure shows a Topology optimization of a control arm:</p><table class = "table" id = "tso-c-user-TopOpt-GenInf__ag805138"><caption/><colgroup><col/></colgroup><tbody class = "tbody">
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<p> Starting with the design
area (which represents the maximum allowed area for the component) and
with the boundary conditions, such as loads, fixtures and manufacturing
conditions, the optimization system will determine a new material distribution
by removing and adding material in the design area. This design proposal
should fulfill all mechanical requirements and often represents a weight-optimal
design proposal.</p><p>For the optimization, the following constraints and objectives can
be applied: </p>
<ul class = "ul">
<li class = "li">stiffness (compliance and displacements)</li>
<li class = "li">eigenfrequencies</li> 
<li class = "li">internal and reaction forces</li>

<li class = "li">weight, volume</li>
<li class = "li">center of gravity</li>
<li class = "li">moment of inertia</li>
<li class = "li">structural stress (von Mises stress)</li>

</ul>
<p>In addition, a number of manufacturing constraints can be applied ensuring
that the design proposal can be produced, for example, with casting or stamping.
Different geometrical constraints can be defined, like member size constraints,
freezing of parts, symmetry, and different coupling constraints. </p>
<p>As a result, the optimization creates a design proposal with the information
regarding the material layout. This design proposal must be interpreted
and must be used for a more detailed analysis. For supporting this
step, the <span class = "ph">Tosca Structure</span>
system supports the generation of a verification model.
This means that a new model based on the results of the topology optimization
can be created easily without the necessity of applying the loads and
boundary conditions manually to the verification model. All <span class = "ph">load cases</span>
and boundary conditions of the original optimization model are also transferred
automatically to the verification model.</p>
<p>With the results of the verification run, it is possible to perform
a normal FE post-processing step within the post-processing environment
suitable for your solver, or a CAD model can be generated that then can
be transferred back to your CAD system.</p>
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