Absorbed energy during compression and crushing of high strength steel sheets

The absorbed energy(Ea orEa′) in static and dynamic compression of the test specimens constructed from high-strength steel sheets, and the influence of the mechanical properties of the sheet steels, on the first buckling load(Pmax), were studied experimentally. The influence of sheet thickness and test specimen size onEa, Ea′, andP was also investigated. The following relations were obtained: In static compression: Pmax = 4.57(Σε =0.02)0.62 · t2.0 x 103(N) Ea = 79.4(Σε=0.02)0.84· t1.9 (J) and in dynamic compression:Ea′=K·(ΣB)0.6 · t1.9 (J) Ea′/Ea decreases with increasing tensile strength of steel sheet, and approaches about 1.2 at above 400 N/mm2.