It can be modelled as a 2D Planner shell as well as 3D Deformable brick element using appropriate interaction. For more, connect with me on my WA https://wa.me/+923440907874, I will guide you in brief.

Hello,

In PLAXIS case, you can use the "create surface" option available in structures. Define the materials and you can do the shearing by either applying a force in x- direction or it can also be achieved by applying a prescribed displacement on the box. Please have a look at the attached picture

Best wishes