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      <div class="title_topic3" id="xps10_pagetitle">NX Nastran Results</div>
      <hr noshade="true"><a name="gsfem_11757"></a><p class="para_topic">The NX Nastran results are shown in Table <a class="links" href="javascript:void(0)" onclick="top.openFile('get_start/03topic_10.html#gsfem_11687');return(false);">2-3</a>.      
      </p><a name="gsfem_11687"></a><div class="title_tableWrapper">Table 2-3. Gear Tooth f06 Results File</div>
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      </table><br><a name="gsfem_11758"></a><div class="title_division">Stress Results</div><a name="gsfem_11759"></a><p class="para_division">First we examine the output for error or warning messages&mdash;none are present&mdash;and find epsilon, which is reported for each subcase (page 5 of the output).  Epsilon is very small in both cases.</p><a name="gsfem_11760"></a><p class="para_division">CHEXA stress results are reported at each element&rsquo;s center and corner grid points.  Stresses at midside grid points are not available.  For gear teeth in alignment (subcase 1), the peak von Mises stress is 1.73E2 MPa at grid points 15 and 17 of CHEXA element 1 (page 6 of the output shown in Table <a class="links" href="javascript:void(0)" onclick="top.openFile('get_start/03topic_10.html#gsfem_11687');return(false);">2-3</a>.) For misaligned gear teeth (subcase 2), the peak von Mises stress is 6.31E2 MPa at grid point 15 (see output).
      </p><a name="gsfem_11764"></a><p class="para_division">Observe that for both subcases the von Mises stresses at grid points shared by two adjacent elements differ.  Solid element stresses are calculated inside the element and are interpolated in toward the element&rsquo;s center and extrapolated outward to its corners.  The numerical discrepancy between shared grid points is due to interpolation and extrapolation differences between adjoining elements in regions where high stress gradients exists (which is often the case in a model with an inadequate number of elements).  This discrepancy between neighboring element stresses can be reduced by refining the element mesh.</p><a name="gsfem_11765"></a><p class="para_division">Note also that solid elements result in a considerable volume of printed output.  If printed output is desired for larger solid element models, you may want to be somewhat selective in requesting output using the Case Control Section of the input file.</p>
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