Low Velocity Impact Damage of Foam Core Sandwich Composites

AbstractIn this study, the foam sandwich panels were manufactured by integrating top facesheet and bottom facesheet with pyramidal lattice stitched core to overcome the weak interface between the core and skins of the sandwich structures. Low-velocity impact test and numerical simulation were conducted to reveal the failure mechanisms and energy absorption capacity at sandwich composite with foam core, different strut stitched foam core under different impact energy. The experimental results show showed that the strut core can improve the impact resistance of the specimen, and which is closely related to the diameter of the strut core. Compared with foam sandwich structure, pyramidal lattice stitched foam sandwich composites have comparable specific energy absorptions. The failure modes were also analyzed which is: fiber breakage, delamination, foam deformation and strut core breakage. The research presented here confirms that numerical simulation show good agreement with the experiment.

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Comparison with Low-Velocity Impact and Quasi-staticIndentation Testing of Foam Core Sandwich Composites

International Journal of Applied Physics and Mathematics ◽

10.7763/ijapm.2012.v2.54 ◽

2012 ◽

pp. 058-062 ◽

Cited By ~ 10

Author(s):

Yan Li ◽

Xuefeng An ◽

Xiaosu Yi

Keyword(s):

Low Velocity Impact ◽

Foam Core ◽

Sandwich Composites ◽

Low Velocity ◽

Velocity Impact

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The Low Velocity Impact Response of Foam Core Sandwich Panels with a Shape Memory Alloy Hybrid Face-Sheet

Materials ◽

10.3390/ma11112076 ◽

2018 ◽

Vol 11 (11) ◽

pp. 2076 ◽

Cited By ~ 3

Author(s):

Hao Li ◽

Zhenqing Wang ◽

Zhengwei Yu ◽

Min Sun ◽

Yanfei Liu

Keyword(s):

Impact Damage ◽

Sandwich Panels ◽

Low Velocity Impact ◽

Face Sheet ◽

Foam Core ◽

Low Velocity ◽

Damage Resistance ◽

Velocity Impact ◽

Bottom Face ◽

The Impact

Most foam core sandwich panels are sensitive to the impact load because of the poor toughness of thin composite face-sheets and the low strength of foam core. Superelastic shape memory alloy (SMA) wires have been applied to enhance the impact damage resistance of composite laminates in recent decades. To improve the impact damage resistance of foam core sandwich panels and to protect the foam core, SMA wires were incorporated into the face-sheets of foam core sandwich panels in this work. Eight new types of SMA hybrid sandwich panels were designed, and low-velocity impact tests were carried out at an impact energy of 35 J. The damage morphology of the impacted sandwich panels was identified by visual inspection and scanning electron microscope technology. Results indicate that the impact damage resistance of the SMA hybrid sandwich panels is enhanced. The damage area in the hybrid sandwich panels is greatly reduced and a decrease of 85.63% can be reached in the bottom face-sheet. The maximum contact force has an improvement of 28.15% when the two layers of SMA wires are incorporated into the bottom face-sheet.

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