PSI - Issue 60

Prince Jeya Lal Lazar et al. / Procedia Structural Integrity 60 (2024) 185–194 Author name / StructuralIntegrity Procedia 00 (2019) 000–000

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transferred to the back face plate to induce plastic deformation. It was observed that during surface and underwater explosions both the front and back face suffered plastic deformation with core crushing.

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Fig. 5 Top face removed to expose core crushing in panels at a 100 mm standoff distance and 0.76 mm core thickness exposed to (a, d) 1 kg TNT (b, e) 2 kg TNT (c, f) 3 kg TNT [a, b, c – Surface explosion, d, e, f – Underwater explosion] The effects of explosive charge mass on the structural integrity of the sandwich honeycomb panels are an important consideration in the field of blast engineering. The effects of explosive charge mass on the core crushing of the sandwich panels for constant core thickness and standoff distance are presented in Fig. 5. As the mass of the explosive charge increases, the total energy released during the explosion also increases proportionally. This results in higher pressure and impulse applied to the sandwich panel. The pressure wave generated by the blast will interact with the panel's front face leading to plastic deformation followed by core crushing and back face deformation. The core of the panel subjected to a blast load generated by 1 kg TNT suffered the least crushing followed by the sandwich panels