The concept of a sacrificial cladding solution emerged in the last decades as a response to the increasing use of improvised explosive devices in terrorist attacks against civil targets. Resorting to the novel 3D printing manufacturing techniques readily available nowadays, the present study examines the nonlinear response of 3D printed PLA honeycomb structures in order to analyze their energy mitigation capacity. These structures are used as the crushable core of a sacrificial cladding solution in combination with an aluminum front plate. The response of the proposed sacrificial solution, when subjected to blast loads, is experimentally determined by means of an explosive driven shock tube, while the corresponding numerical simulations are achieved through the commercial finite element software LS-DYNA. The experimental and numerical results are in good agreement and readily show that, as expected, the plateau force is directly proportional to the considered infill ratios. Additionally, the nonlinear response of PLA honeycomb structures, when subjected to out-of-plane blast loads, was found to be mainly dependent on relative density, which controls the crushing of the top and bottom layers of the PLA honeycomb and the buckling of its interior cell walls.
|Title of host publication||Proceedings of the 18th International Symposium for the Interaction of Munitions with Structures (ISIEMS)|
|Publication status||Published - 2019|
|Event||18th International Symposium on the Interaction of the Effects of Munitions with Structures (ISIEMS) - Panama City Beach, United States|
Duration: 21 Oct 2019 → 25 Oct 2019
|Conference||18th International Symposium on the Interaction of the Effects of Munitions with Structures (ISIEMS)|
|City||Panama City Beach|
|Period||21/10/19 → 25/10/19|