Dynamic compression of metallic sandwich structures during planar impulsive loading in water

摘要: The compressive response of rigidly supported stainless steel sandwich panels subject to a planar impulsive load in water is investigated. Five core topologies that spanned wide range crush strengths and strain-dependencies were They included (i) square-honeycomb, (ii) triangular honeycomb, (iii) multi-layer pyramidal truss, (iv) corrugation (v) diamond corrugation, all with relative density approximately 5%. Quasi-statically, the honeycombs had highest peak strength, but exhibited strong softening beyond strength. truss corrugated cores significantly lower post yield plateau extended plastic strain 60% similar metal foams. Dynamically, transmitted pressures scale quasi-static final momentum increased slowly strength (provided not fully crushed). It shown essential aspects dynamic response, such as degree compression, are captured surprising fidelity by modeling equivalent foams having represented implication that, despite considerable differences topology deformation modes, simple foam-like model replicates loads. remains ascertain whether models capture more nuanced panel behavior when locally loaded edge clamped configurations.