International Journal of Aerospace and Lightweight Structures (IJALS)

Volume 3 Number 1 (2013)

International Journal of Aerospace and Lightweight Structures

doi: 10.3850/S201042862013000550

A Design Guide of Double-Layer Cellular Claddings for Blast Alleviation

Shenfei Liaoa, Zhijun Zhengb, Jilin Yuc and Zhibin Lid
CAS Key Laboratory of Mechanical Behavior and Design of Materials, University of Science and Technology of China,
Hefei, Anhui 230026, PR China.


This paper presents a method for the design of a Double-Layer Cellular Cladding (DLCC) serving as a protective function against blast load. Two configurations of DLCCs are considered, i.e. cladding with cellular cores of identical density (Cladding-1) and cladding with a higher density cellular core layer close to the blast load (Cladding-2). Shock wave propagations in the two DLCCs are investigated by using a one-dimensional shock model. Single shock front propagates in Cladding-1, while double shock fronts propagate in Cladding-2. A closed-form solution of the critical thickness, which is the minimum thickness required to fully absorb blast load, is given for Cladding-1. Response features of Cladding-2 are analyzed and then the critical thickness of Cladding-2 is determined by optimizing the layer thicknesses. It is demonstrated that, with equal mass of the cover plates, a SLCC is always more efficient than Cladding-1, while Cladding-2 can be more efficient than a SLCC. A design method for Cladding-2 against blast load is further presented. Comparison between the cell-based FE results and the analytical predictions is generally good. The difference in the comparison is analyzed through distribution of strain of Cladding-2 measured by the strain field calculation method.

Keywords: Blast alleviation, Double-layer cellular cladding, Shock wave propagation, Strain distribution, Voronoi honeycomb.

Back to TOC