Citation

Smith R, Altenhof W, Bondy M, Lapain M. Int. J. Crashworthiness 2016; 21(6): 627-643.

Copyright

(Copyright © 2016, Informa - Taylor and Francis Group)

DOI

10.1080/13588265.2016.1209851

PMID

unavailable

Abstract

Mechanical responses of quasi-static and dynamic transversely loaded empty/foam-filled braided tubes were investigated with a custom load frame and pneumatic gun/projectile at velocities ranging from 21 to 27 m/s. Braided tubing was woven from AISI 304 wire (wire diameter: 0.51 mm, external diameter: 64.5 mm, length: 330 mm). Foam density ranged between 162 and 520 kg/m3. Localised foam collapse at mid-span under impact resulted in greater energy absorption for foam-filled specimens compared to quasi-static tests. Foam density significantly influenced force efficiency for reduced deflections. For low-density quasi-static tests, the average force efficiency was 58.3% decreasing to 41.9% under impact. Force efficiency for high-density foam under quasi-static loading was 42.8% decreasing to 23.4%. High-density foam cores exhibited minimal foam crushing as the increased mechanical properties of the foam resulted in braided tube failure. Low/medium-density foam cores yielded both optimal specific energy absorption over the full deflection range and force efficiency for reduced deflections.

Language: en