If nothing yields and the deformation is purely elastic (both component and floor) then yes, I believe that all the energy should be converted from kinetic to strain at the instant of maximum deformation (and therefore maximum force, and maximum de/acceleration).
I'm not sure that you can do it purely with constraints though, as it's a transient, quasi-static situation in which the reaction force from the floor is in equilibrium with the mass × acceleration of the component and therefore the 'constraint' is distributed over the entire mass of the component (which will have a varying displacement throughout). You can do it either with a force and inertia relief (possibly), or with a constrained floor and a gravity (= acceleration) load (more reliably), I think.