A New Blast Absorbing Sandwich Panel with Unconnected Corrugated Layers—Numerical Study

The need for more effective defence systems is of critical importance because the rising risk explosive attacks. Sandwich panels are used as plastically deforming sacrificial structures, absorbing blast wave energy. To authors’ knowledge, behaviour sandwich with connected (welded/bolted/riveted) corrugated layers has been well covered in literature. Hence, aim this numerical study was to develop new, easy-to-build, non-expensive, graded panel ‘unconnected’ that can be a multipurpose protective structure against wide range threats. proposed composed six unconnected aluminium (AL6063-T4) core encased steel (Weldox 460E) frame 330 × 150 mm overall dimensions. analysis conducted using Abaqus/Explicit solver. First, performance four different nongraded layer topologies (trapezoidal, triangular, sinusoidal, and rectangular) compared, when subjected ~16 MPa peak reflected over-pressure (M = 0.5 kg TNT at R m). Results showed trapezoidal topology outperformed other topologies, uniform progressive collapse, lower reaction force, higher plastic dissipation Then, further analysed design ‘graded’ absorb intensities (~4, 7, 11, 13, 16 over-pressures) by (0.4, 0.8, 1.2 mm) stepwise thickness combination layers. In conclusion, superior considered novel alternative conventional costly laser-welded panels. Applications new solution from protecting civil structures military facilities.