| Autor: |
Raoof, F., Rezapour, J., Gohari Rad, S., Rajabiehfard, R. |
| Zdroj: |
Journal of Dynamic Behavior of Materials; 20220101, Issue: Preprints p1-18, 18p |
| Abstrakt: |
This study investigates the crashworthiness behavior of thin-walled mild steel cylindrical tubes against hybrid tubes made of mild steel and high density polyethylene (HDPE) exposed to high-rate dynamic loadings. To carry out this investigation, three types of tubes are used. First type samples are thin-walled tubes made of mild steel; second types are mild steel/HDPE tubes having a central hole; and the third types are steel/HDPE tubes having five longitudinal holes. Using a striking mass that is shot through a gas gun to the tube, the effect of high-rate axial impacts on the energy absorption parameters including mean crushing force, peak load and other crashworthiness parameters are further studied experimentally. Finite element numerical simulation is then conducted to examine the effect of higher-rate velocities of striking object on the dynamic responses of specimens. Results show that the hybrid steel-HDPE tubes have better performance under high-rate impacts due to lower magnitudes of mean crushing force and peak load which lead to a better crashworthiness. Also, under the same dynamic impact conditions, the hybrid steel-HDPE tubes with a central hole have better energy absorption capacity. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
|
Full text from SpringerLink