Bending collapse theory of thin-walled twelve right-angle section beams filled with aluminum foam

This paper aims at studying the bending collapse behavior of the thin-walled twelve right-angle section (TTRS) beams filled with aluminum foam. This paper presents the theoretical bending characteristics of the TTRS-typed aluminum foam around two axes. Considering the contribution degree of thin-walled beam and aluminum foam in different angle range, the expressions of the bending moments are derived. The accuracy of the theoretical calculations are validated by performing 14 groups finite element simulations respectively including three kinds of aluminum foams with certain scope of plateau stress (1-12.5 MPa) and corresponding density (0.2-0.52 g/cm(3)). The results show that the bending collapse theory proposed in this paper can reflect the mechanical properties of the TTRS beams filled with aluminum foam accurately, and the moment-rotation curves calculated by theory are in good agreement with simulation results. (C) 2015 Elsevier Ltd. All rights reserved.