Torsional crushing of foam-filled thin-walled square columns

✍ Scribed by Weigang Chen; Tomasz Wierzbicki; Ottmar Breuer; Kare Kristiansen

• Book ID: 104140136
• Publisher: Elsevier Science
• Year: 2001
• Tongue: English
• Weight: 731 KB
• Volume: 43
• Category: Article
• ISSN: 0020-7403
• DOI: 10.1016/s0020-7403(01)00040-6

✦ Synopsis

Torsional crushing behavior of foam-ÿlled thin-walled square columns were investigated analytically, numerically and experimentally. The lower and upper bounds on the torsional resistance of foam-ÿlled columns were established analytically. Numerical simulations were carried out and showed that the presence of the ÿller changes the torsional collapse mechanism and gives rise to higher order sectional collapse modes, which results in a higher torsional resistance. Torsional experiments were performed and results were compared to the analytical and numerical solutions with reasonably good agreement. It was found that bonding of the foam to the walls changes the deformation mode by spreading deformation over the whole length. The corresponding torsional resistance is also larger for the ÿrst 40

• of rotation. It is concluded that ÿtting prismatic members with the aluminum foam of a density ranging from 0.14 to 0:28 g=cm 3 can double the energy absorption of a given member.