Dynamic response of aluminum honeycomb sandwich panels under foam projectile impact

2017 ◽  
Vol 25 (8) ◽  
pp. 637-646 ◽  
Author(s):  
Xin Li ◽  
Peiwen Zhang ◽  
Li Shiqiang ◽  
Zhihua Wang ◽  
Guiying Wu
Keyword(s):  
Dynamic Response ◽  
Sandwich Panels ◽  
Projectile Impact ◽  
Honeycomb Sandwich ◽  
Aluminum Honeycomb

scholarly journals Ballistic Resistance of Honeycomb Sandwich Panels under In-Plane High-Velocity Impact

2013 ◽  
Vol 2013 ◽  
pp. 1-20 ◽  
Author(s):  
Chang Qi ◽  
Shu Yang ◽  
Dong Wang ◽  
Li-Jun Yang
Keyword(s):  
Structural Parameters ◽  
Sandwich Panels ◽  
Unit Cell ◽  
Dynamic Responses ◽  
Honeycomb Core ◽  
Ballistic Resistance ◽  
Honeycomb Sandwich ◽  
Aluminum Honeycomb ◽  
Parametric Studies ◽  
Nonmonotonic Effects

The dynamic responses of honeycomb sandwich panels (HSPs) subjected to in-plane projectile impact were studied by means of explicit nonlinear finite element simulations using LS-DYNA. The HSPs consisted of two identical aluminum alloy face-sheets and an aluminum honeycomb core featuring three types of unit cell configurations (regular, rectangular-shaped, and reentrant hexagons). The ballistic resistances of HSPs with the three core configurations were first analyzed. It was found that the HSP with the reentrant auxetic honeycomb core has the best ballistic resistance, due to the negative Poisson’s ratio effect of the core. Parametric studies were then carried out to clarify the influences of both macroscopic (face-sheet and core thicknesses, core relative density) and mesoscopic (unit cell angle and size) parameters on the ballistic responses of the auxetic HSPs. Numerical results show that the perforation resistant capabilities of the auxetic HSPs increase as the values of the macroscopic parameters increase. However, the mesoscopic parameters show nonmonotonic effects on the panels' ballistic capacities. The empirical equations for projectile residual velocities were formulated in terms of impact velocity and the structural parameters. It was also found that the blunter projectiles result in higher ballistic limits of the auxetic HSPs.

Dynamic behavior of aluminum honeycomb sandwich panels under air blast: Experiment and numerical analysis

2014 ◽  
Vol 108 ◽  
pp. 1001-1008 ◽  
Author(s):  
Xin Li ◽  
Peiwen Zhang ◽  
Zhihua Wang ◽  
Guiying Wu ◽  
Longmao Zhao
Keyword(s):  
Numerical Analysis ◽  
Dynamic Behavior ◽  
Sandwich Panels ◽  
Air Blast ◽  
Honeycomb Sandwich ◽  
Aluminum Honeycomb

Dynamic response of circular metallic sandwich panels under projectile impact

2016 ◽  
Vol 19 (5) ◽  
pp. 572-594 ◽  
Author(s):  
Peiwen Zhang ◽  
Xin Li ◽  
Tao Jin ◽  
Zhihua Wang ◽  
Longmao Zhao
Keyword(s):  
Dynamic Response ◽  
Sandwich Structure ◽  
Impact Resistance ◽  
Sandwich Panels ◽  
Face Sheet ◽  
Foil Thickness ◽  
Geometrical Configuration ◽  
Projectile Impact ◽  
Back Face ◽  
The Impact

The dynamic response of circular sandwich panels with aluminium honeycomb and corrugated cores under projectile impact was investigated experimentally and numerically. Impulse loaded on the panel was controlled by projectile launching velocity and the deformation process of sandwich panels was recorded by a high-speed camera in the experiments. Typical deformation/failure modes of face-sheets and cores were obtained and analysed. The back face-sheet deflections and strain histories of face-sheets were measured and discussed. A parametric study was conducted by LS-DYNA 3D to analyse the effect of geometrical configuration on energy absorption mechanism and back face-sheet permanent deflection of circular sandwich panels. The results indicated that the impact resistance of the structure was sensitive to geometrical configuration. Increasing face-sheet thickness and core relative density significantly improved sandwich structure impact resistance. Increasing foil thickness improved the panel impact resistance more efficiently than decreasing wall side length. The results have important reference value to guide engineering application of the sandwich structure subjected to impact loading.

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