GGU-SLAB: "Refine individually" menu item

Mesh elements can be selected for refinement using the following menu item.

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Upon activating the "Consider displacement BC" check box, new nodes located immediately between two nodes with displacement boundary conditions will be assigned the average of the two values. This procedure is not unequivocal when applied to action boundary conditions and can lead to misunderstandings. Action boundary conditions are therefore not refined during mesh refinement.

Three different refinement methods can be applied for element refinement. Refinement will be demonstrated on the following mesh using element 23 as an example.

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Figure 3 FEM refinement demonstration mesh

• "Method 1"
  An additional node is generated in the centroid of the selected triangle.

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Figure 4 FEM mesh refinement using Method 1

• "Method 2"
  The selected triangle element and the neighbouring triangle element are halved.

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Figure 5 FEM mesh refinement using Method 2

• "Method 3"
  A new triangle element is inserted at the median of the clicked triangle element. The neighbouring triangle elements are halved.

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Figure 6 FEM mesh refinement using Method 3