Dynamically similar subscale testing has long been central to engineering design in fluid dynamics, where subscale wind-tunnel and demonstrator testing provide aerodynamic data for full-scale systems. However, in solid continua, no exact, universally applicable method for dynamic similitude has previously existed. UniSim provides such an exact unified dynamic similitude model. It defines for the first time a set of dimensionless coefficients sufficient for strictly accurate dynamic similitude in any given solid structure.

The model has already been further developed and demonstrated across a range of case studies, including aircraft wing impact landing, nonlinear dynamic crushing with plastic deformation and self-contact, Mars helicopter landing under scaled gravity, fluid–structure interaction of highly flexible wings, fuel sloshing in high-aspect-ratio wings, and, more recently, composite structures. Further developments have also extended UniSim to include dissipative effects such as material damping, as well as fully coupled thermomechanical processes.