Coiled energy absorbing devices.

摘要

This dissertation investigates the potential for energy consumption through the use of plastically deforming springs. A mechanical spring is defined as an elastic body which has the primary function to deflect or distort under load, and return to its original shape when the load is removed (SAE 1996). Therefore, if a spring plastically deforms, the name no longer fits the definition. Coiled Energy Absorbing Devices (CEAD) is the selected name for the topic of this research. Springs taking a permanent set or developing non-elastic deformations have typically been avoided and, as such, the level of information is limited. This research project used non-linear finite element analysis as well as full-scale prototype static and dynamic testing to study various CEAD configurations and their response to different loading conditions. A full-scale computer model of a Truck Mounted Attenuator (TMA) is generated and results are discussed.