Element Selection by Adjacent Face in Femap

Element Selection by Adjacent Face


Sometimes in the absence of any underlying geometry, finite element selection can become challenging. Femap includes many capabilities that can aid element selection, and in this example we’ll see how to create a group by selecting a number of elements that have adjacent faces.

Element Selection by Adjacent Face

Please follow these step-by-step instructions:
  1. When selecting the elements in the Entity Selection dialog, click on the Pick ^ button, and select By Faces… and a second Entity Selection dialog appears.
  2. Here you need to select the general group of elements that includes the subset of elements you eventually want to end up with. In this case we can Select All and click OK.
  3. In the subsequent Face Selection dialog, select the Adjacent Faces radio button, and pick one of the element faces in the model, then click OK.
  4. Now back in the first Entity Selection dialog, we can highlight the selected elements using the Highlight icon button.
  5. In this example all of the elements of the top face have been selected up to a corner in the model, and we actually want to select all of the top surfaces. So we can Cancel out of the operation and repeat the above steps to get back to the Face Selection dialog.
  6. The Face Selection dialog contains an angle tolerance that controls what Femap considers to be the adjacent element plane from element to element. The default is 20.0 degrees, and by increasing this tolerance we allow Femap to include elements around less acute angles in the model. A setting of 80.0 should suffice for this example.
  7. Click OK and Highlight the selection once again in the first Entity Selection dialog, and now we see that all of the desired elements have been captured in the selection.

Video Demonstration

    • Related Articles

    • Extrude Element Edge

      Overview In FEMAP it’s possible to extrude element edges to create new shell elements. Instructions Creating new shell elements is useful when there is no geometry or other edge surfaces available. Let’s see how you can do this by follow these ...
    • Element Visual Inspection

      Overview When FEMAP finishes meshing a model, a brief report of the mesh quality is written to the Messages pane. It's often desirable to visually inspect the worst elements of the mesh, and review their shape, and location in the model, an action ...
    • 3D Element Quality Jacobian Webinar

      What is in this webinar? Discussion of the formulation of three dimensional finite elements The corresponding element quality parameters Capabilties to check/correct 3D element quality Femap Details and Licensing Advanced Support Services
    • Evaluating 2D Element Qualities - Jacobian

      What is in this webinar? This webinar will discuss how to evaluate 2D element qualities, specifically: It will describe the element Jacobian mathematically, at a high level It will explaing how the Jacobian is implemented in the FEM process. It will ...
    • Triangular Elements in Finite Element Modeling

      What is in this webinar? This webinar will discuss triangular elements in finite element modeling, specifically: The disadvantages of triangular elements and a comparison to quadrilateral elements. Methods to avoid triangular elements using geometry ...