Numerical Modelliing Of Square Tubular Steel Beams Subjected To Transverse Blast Loads Thin
Date
2009Author
Grzebieta, RH
Nurick, GN
Bambach, MR
Jama, HH
Type
ArticleLanguage
enMetadata
Show full item recordAbstract
This paper presents the numerical simulations of thin-walled square hollow steel beams subjected to a uniform transverse blast load. The objectives of the numerical simulations were to gain an insight into the temporal distribution of the global and local deformation and the adiabatic temperature rise in the beams as a result of impulsive loading. Additionally, the finite element predictions using Ls-Dyna are compared to the experimentally observed global and local deformations. The full lengths of the beams were modelled using three material models based on the linear piecewise plasticity material model which incorporated strain hardening, with and without strain-rate hardening and with strain-rate hardening and temperature softening. The blast wave was simulated as a rectangular pressure pulse distributed over the top surface of the beams. Ls-Dyna and the material model used were found to predict the global and local deformation of the beams reasonably well. Incorporating strain-rate hardening was found to be important to be able to predict the global and local deformation of the beams. Thermal softening was found to play a small but not negligible role.
URI
http://www.sciencedirect.com/science/article/pii/S0263823109001207http://erepository.uonbi.ac.ke:8080/xmlui/handle/123456789/39622
Citation
Thin-Walled Structures Volume 47, Issue 12, December 2009, Pages 1523–1534Publisher
Department of Civil Engineering, Monash University, Vic. 3800, Australia Blast Impact Survivability Research Unit (BISRU), Department of Mechanical Engineering, University of Cape Town, Private Bag, Rondebosch 7701, South Africa NSW Injury and Risk Management Research Centre, UNSW, NSW, 2052 Sydney, Australia