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      <title>PRAC2D</title>
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      <div class="title_refTopic" id="xps10_pagetitle">PRAC2D </div>
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      <h4 class="refClassification">CRAC2D Element Property </h4>
      <p class="para_refTopic">Defines the properties and stress evaluation techniques to be used with the CRAC2D structural element. </p>
      <div class="title_refCategory">Format: </div>
      <div class="refCategoryContent">
         <table border="1" width="100%" align="center">
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                     <p class="para_th">1 </p>
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                  <th align="center" colspan="1" rowspan="1">
                     <p class="para_th">2 </p>
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                  <th align="center" colspan="1" rowspan="1">
                     <p class="para_th">3 </p>
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                     <p class="para_th">4 </p>
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                     <p class="para_th">5 </p>
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                     <p class="para_th">6 </p>
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                     <p class="para_th">7 </p>
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                     <p class="para_th">8 </p>
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                     <p class="para_th">9 </p>
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                     <p class="para_th">10 </p>
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            <tbody>
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                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">PRAC2D </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">PID </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">MID </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">T </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">IPLANE </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">NSM </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">GAMMA </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">PHI </p>
                  </td>
                  <td align="center" bgcolor="gray" colspan="1" rowspan="1">
                     <p class="para_td">&nbsp; </p>
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                     <p class="para_td">&nbsp; </p>
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      <div class="title_refCategory">Example: </div>
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                     <p class="para_td">PRAC2D </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">108 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">2 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">0.10 </p>
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                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">0 </p>
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                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">.17 </p>
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                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">.50 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">180. </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">&nbsp; </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">&nbsp; </p>
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      <div class="title_refCategory">Fields:</div>
      <div class="refCategoryContent">
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                  <th align="left" colspan="1" rowspan="1">
                     <p class="para_th"><b class="uiTerm">Field </b></p>
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                  <th align="left" colspan="1" rowspan="1">
                     <p class="para_th"><b class="uiTerm">Contents </b></p>
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                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">PID </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Property identification number.  (Integer &gt; 0) </p>
                  </td>
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               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">MID </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Material identification number.  (Integer &gt; 0) </p>
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                     <p class="para_td">T </p>
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                     <p class="para_td">Element thickness.  (Real &gt; 0.0) </p>
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                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">IPLANE </p>
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                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Plane strain or plane stress option.  Use 0 for plane strain; 1 for plane stress.  (Integer = 0 or 1) </p>
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                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">NSM </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Nonstructural mass per unit area.  (Real &ge; 0.0; Default = 0) </p>
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                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">GAMMA </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Exponent used in the displacement field.  See Remark <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/18topic_51.html#ref89933');return(false);">82-4. </a> (Real; Default = 0.5) 
                     </p>
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                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">PHI </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Angle (in degrees) relative to the element x-axis along which stress intensity factors are to be calculated.  See Remark <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/18topic_51.html#ref89933');return(false);">82-4. </a> (Real; Default = 180.0) 
                     </p>
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      <div class="title_refCategory">Remarks: </div>
      <div class="refCategoryContent">
         <ol type="1" start="1">
            <li>
               <p class="para_item">All PRAC2D property entries should have unique identification numbers with respect to all other property entries. </p>
            </li>
            <li>
               <p class="para_item">PRAC2D entry may refer to MAT1, MAT2, or MAT8 material property entries. </p>
            </li>
            <li>
               <p class="para_item">For plane strain analysis, only MAT1 type data should be used. </p>
            </li>
            <li><a name="ref89933"></a><p class="para_item">Nondefault values for GAMMA and PHI have not been tested.  Therefore, the default value should be used. </p>
            </li>
         </ol>
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