For the LS-DYNA mesh: I am using shell elements (8SECTION_SHELL -> option plane strain). This means I am essentially modeling 2D solid elements. I create create a segment set by selecting the edge and clicking propagate. Then, I apply the load via *LOAD_SEGMENT_ID. I also applied *HOURGLASS type 7. I do not know if this is necessary, though.
For the ANSYS Mechanical mesh: I am using PLANE182 elements with a plane strain assumption.
I already found out that LS-DYNA does exert the pressure on the normal axis, since the tip of the valve cannot be lower than the middle of the valve if it was exerted in the x-direction. The weird thing is, when I run the simulations in ANSYS Mechanical 2021R1 the displacement does coincide with LS-DYNA, but when I use ANSYS Mechanical R19.2, the deformation is much larger than LS-DYNA. Do you know why this is the case?