Archaeologists and geophysicists in Canada are trying to pinpoint the signatures of unmarked burials by using geophysical methods varied terrains.

Deformation of the material during cyclic expansion extrusion (CEE) is investigated using upper-bound theorem. The analytical approximation of forming loads agrees very well with the FEM results for different amounts of chamber diameter, friction factor and also for lower die angles. However, the difference between analytical and numerical solution increases at higher die angles which are expla...