# penta (mig + T)

Restriction: Available in Nastran and OptiStruct.
This realization supports T-joints and creates PENTA element for the body. Surrounding shell/solid elements are projected and connected with RBE3 elements. This realization supports the creation of PENTA elements on one side or on both sides of the joint, and provides a right-angled option.

## Penta Realization Options

Option Action
width Specify the length of a penta.
Note: Only available for penta (mig), penta (mig + L), penta (mig + T), and penta (mig + B).
fitted/equilateral/equilateral-fitted
Select the size and shape of a penta.
fitted
The length of one penta edge is the exact projection distance, and the length of the other penta edge is defined by the width value; the penta has an right-angle.
equilateral
Create an equilateral penta; leg lengths are defined by the width value.
equilateral/fitted
Combination of fitted and equilateral; you do not need to define a width when you select this option.
Note: Only available for penta (mig) and penta (mig + L).
right-angled
Create a right-angled penta that is oriented around the bisector. Clear this checkbox to create an angle adapted penta.
Note: Only available for penta (mig) and penta (mig + T).
both sides/positive sides/negative sides
Select which side of the normal to create the penta on.
(mig + L)
The negative side is the side where the links are fairly parallel to each other. The angle that is close to 90° (88° to 90°) the element normal of the first found shell element at the free edge decides which side is the positive and the negative side.
(mig + T)
The positive side is normally the side with the obtuse angle. The angle that is close to 90° (88° to 92°) the element normal of the first found shell element at the free edge decides which side is the positive and negative side.
(mig + B)
The positive side is the side where the element normal of the first link points to.
Note: Only available for penta (mig), penta (mig + L), penta (mig + T), and penta (mig + B).
edge details
In many cases, the connector position is not very precise. To create the requested result, an automatic edge snapping can be enabled. In the first step the connector snaps to, for example, the closest free edge, and then from there the projection and FE creation starts. Select how many element rows away from the free edge to snap the connector to for L and T connections.
maximum 1 element row
maximum 2 element rows
no
Do not snap the connector.