Abstract
The self-locked energy absorbing system can prevent lateral splash of tubes from impact loadings without any requirements for boundary constraints or inter-tube fasteners, thus breaking through the limitation of widely-used round tube systems. To reveal the mechanism of the impact response of self-locked systems, both impact experiment and FEM simulations are carried out. Based on the experimental and simulation results, a one-dimensional theoretical crushing model of the system is developed to analyze the dynamic response of the system, in which a plastic hinge model of the unit cell is proposed for the force-deformation relation. Three deformation modes of the system are predicted and observed, and moreover, the criteria to determine the deformation mode of the system are established analytically. A guideline on the design of the self-locked system is summarized, which is helpful in practical applications.
| Original language | English |
|---|---|
| Pages (from-to) | 209-227 |
| Number of pages | 19 |
| Journal | International Journal of Impact Engineering |
| Volume | 122 |
| DOIs | |
| State | Published - Dec 2018 |
Keywords
- Deformation modes
- Dynamic response
- Energy absorption
- Self-locked system
- Theoretical crushing model