AXIAL CRUSHING OF TRIANGULAR TUBES

摘要: In the present paper, mechanical behavior of large deformation a regular equilateral triangular tube under quasi-static axial crushing is reported, which polygon with an acute angle and odd number sides. Based on results from nonlinear finite element analysis (FEA), new type inextensional basic plastic collapse folding proposed to describe progressive collapse. The around stationary horizontal hinges inclined traveling are involved develop element. Two types inextensible modes discovered, i.e., diamond mode rotational symmetrical mode. average load for each predicted super-folding theory, was previous investigation square columns. A rigid-plastic material model kinematically admissible in this theory. further validated against experiments. approximate theoretical predictions mean loads tubes provide reasonable agreement corresponding experimental results.