Abstract
This paper presents an attempt to modify an existing theoretical model to predict the bending collapse response of hat-section tubular structures. The analytical collapse model was based on Kim and Reid. Additional hinge lines created during deformation of the tube were examined and integrated with existing model to forming a modified analytical solution. Variation of the hinge moments were solved using limit analysis technique. Procedure for developing the finite element (FE) models of tube specimens was also presented. Moment-rotation characteristics from pure bending simulation were compared with analytical model and good agreement was achieved. The average of differences between simulation and calculation were found to be <5% within plastic region. In conclusion, the modified analytical solution has adequate capability to predict the moment-rotation relationship of hat-section tubes subject to pure bending..
Highlights
Thin-walled structure is a kind of typical energy absorbers used in many applications such as automotive, naval, and aerospace
Real crash scenario shows that almost 90% of structural members involved in an accident failed in bending collapse mode [1]
The modified theoretical model provides an adequate accuracy on qualitative and quantitative estimation of the moment variation. They were compared with simulation of pure bending of the tubes at different cross section
Summary
Thin-walled structure is a kind of typical energy absorbers used in many applications such as automotive, naval, and aerospace. The study of bending behaviour of thin-walled tubular structures was first reported by Abramowicz and Wierzbicki [2] and Kecman [3] Both approaches involved nonlinear geometrical problems in plasticity. Wierzbicki et al [4] proposed a collapse model based on the moving hinge lines within a small angle range This model was further improved by Kim and Reid [5] by introducing a new kinematically admissible folding mechanism to predict bending collapse of square and rectangular cross section tubes. It closely resembles Kecman’s model [3] with inclusion of some in-plane deformation and introduced two additional free parameters from total plastic work. Comparison results show good agreement and the modified analytical approach is validated
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: International Journal of Engineering & Technology
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
