Modelling of 3D solid & 2D shell elements
I am performing a static analysis on a wing of an aircraft. A problem that I am encountering is the modelling of solid elements with shell elements.
As shown in picture 1, the loads are not transferred to the entire structure of the wing that is why the stress is super high as it is concentrated at the wing attachement region where the lug is shown in the picture 2.
picture 3 shows that the mesh is of 2D and 3D elements is connected. I also used bonded contact for the 3D elements and 2D shell elements. For both lugs.
Picture of properties of bonded contact.
Fixed supports at holes of the 2 lugs.
I just do not understand why the loads are not transfering to other regions of the structure of the wing. Could anyone help out with this problem? The stress is too high 14000 MPa!!! beyond the yielding stress of the material which is 520MPa!!!
Maybe the problem lies with the connection of 2D & 3D elements?