Folded Flanges, Special Cases
- Last UpdatedDec 03, 2025
- 2 minute read
When using folded flanges on the free side of a bracket it is normally quite clear how the flange will connect to the bracket toes. This is not the case when the folded flange is set on an arbitrary straight part of the outer contour of a plane panel.
The determining factor when choosing how to place the folded flange is the angle between the base line of the flange and the adjoining segment of the outer contour
Figure 1:9. Definition of points and vectors.
|
P |
End point of the flange. |
|
B |
Direction vector of the base line of the flange. |
|
T1 |
Direction vector for the segment adjoining the flange in P. |
|
T2 |
Tangent of the arc of the flange in point P. The following discussion will concern how to choose T2 depending on B and T1. |
|
V |
The angle between T1 and B. |
A connection in the point P can be either concave or convex depending on V. Each of these connection types can be divided into one obtuse and one acute case
Figure 1:10. Convex Obtuse. 0 < V < 90.
Figure 1:11. Convex Acute. 90 < V < 180.
Figure 1:12. Concave Obtuse. -90 < V < 0.
Figure 1:13. Concave Acute. -180 < V < -90.
Concave acute is an extreme case, where no folded flange can be used. Only the other three cases will be regarded below.