Author details

curved sandwich panel with thicker face-sheets deforms smaller due to the relatively larger structural stiffness; however, the severe damage may occur at the thinner front face-sheet under the large blast loading. Moreover, the total energy absorption amount of the curved sandwich panels decreases with the increased core relative density. Compared to the sandwich panels with the 10% core relative density, those specimens with 15 and 20% core density display relatively smaller energy absorption values, by 3.95 and 8.3%, respectively. This is attributed that the core compression values decrease with the increased core relative density, and the dominant deformation/failure mode of curved sandwich specimens is converted from the local core compression to global bending deformation, resulting in a weaker energy

Figure 21. Plastic energy dissipation by the components of curved sandwich panels.

Single-curvature sandwich panels with closed-cell aluminum foam cores, which include two radii of curvature (i.e., 250 and 500 mm), three face-sheet thicknesses (i.e., 0.5, 0.8, and 1.0 mm), and six different arrangements of foam core layers, were tested under air-blast loadings of various magnitudes. A total of 48 curved sandwich panels were examined, and the typical deformation and failure modes and the quantitative blast impulse and specimen deflection results were obtained and discussed. Based on the experiments, the corresponding finite element simulations were conducted using LS-DYNA software. The explosion and structural

absorption capability.

138 Contact and Fracture Mechanics

4. Conclusions

Lin Jing1 \*, Zhihua Wang<sup>2</sup> and Longmao Zhao<sup>2</sup>

\*Address all correspondence to: jinglin\_426@163.com

1 State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu, China

2 Institute of Applied Mechanics and Biomedical Engineering, Taiyuan University of Technology, Taiyuan, China
