Degenerated Shell Elements A degenerated shell element is an element in a mesh that has a curved or rounded geometry, rather than being a simple rectangl...
A degenerated shell element is an element in a mesh that has a curved or rounded geometry, rather than being a simple rectangle or triangle. These elements can be created by meshing a curved surface or by using a boundary element that is curved or rounded.
There are two main types of degenerated shell elements:
Linearly deformed elements: These elements are created by bending a linear segment or arc to create the shape of the element.
Non-linearly deformed elements: These elements are created by using a curve fitting technique to fit a curve to the surface of the element.
Both types of degenerated shell elements have the following properties:
They have a curved or rounded geometry.
They are not as accurate as linear or quadratic elements.
They can be used to model complex geometries that would be difficult to model with other element types.
Here are some examples of degenerated shell elements:
Circle: A circle can be divided into a sequence of linear shell elements.
Rectangle: A rectangle can be divided into a sequence of quadratic shell elements.
Curved surface: A curved surface can be meshed with a sequence of linear or quadratic shell elements.
Boundary element: A boundary element can be curved or rounded to model a complex geometry.
Advantages of degenerated shell elements:
They can model complex geometries that would be difficult to model with other element types.
They can be used to improve the accuracy and efficiency of simulations.
Disadvantages of degenerated shell elements:
They can be less accurate than other element types.
They can be more difficult to mesh