A task was initiated to improve the energy absorption capability of an existing aircraft seat through costeffective retrofitting, while keeping seat-weight increase to a minimum. This task was undertaken as an extension of NASA ongoing safety research and commitment to general aviation customer needs. Only vertical crash scenarios have been considered in this task which required the energy abso...

Abstract The sudden impact during a collision of an automobile may cost the life passengers. Several researchers are working to design materials and structures which can absorb impact-energy before passing it One such solution is crash-box-structure placed primarily on frontal side, in-between bumper main part automobile. crash-box-structure’s ability energy influenced by its deformation-proper...

In this paper, the vibration characteristics of multi-layer shell that internal and external surfaces with a layer of piezoelectric sensor and actuator is investigated. The backrest shell laminated with simple analytical method to evaluate and the results were compared with results obtained by other researchers. The numerical solution methods (GDQ) for shells with piezoelectric layers and plain...