Low-velocity impact response of sandwich beams with functionally graded core

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The blast resistance of sandwich composites with stepwise graded cores (2009, background): “The numerical investigation by Apetre et al. (2006) has shown that a reasonable core design can effectively reduce the shear forces and strains within the structures. Consequently, they can mitigate or completely prevent impact damage on sandwich composites. Li et al. (2001) examined the impact resp”
Blast Mitigation in a Sandwich Composite Using Graded Core and Polyurea Interlayer (2012, background): “[4] on the impact damage of sandwich structures with a graded core (density) has shown that a reasonable core design can effectively reduce the shear forces and strains within the structures.”
The impact response of graded foam sandwich structures (2013, background): “This includes continuously, piece-wise, layer-wise and exponentially functionally-graded cores [9–15].”
Optimisation of functionally graded lattice structures using isostatic lines (2017, background): “A functionally graded sandwich core structure is also useful in applications for core materials subject to impact where the stiffness profile during crushing can be tailored [10].”