Mechanical behavior of all-composite pyramidal truss cores sandwich panels

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• 作者：Yuguo Sun ; Liang Gao
• 关键词：Sandwich panel ; Pyramidal truss ; Mechanical property ; Failure mechanism
• 刊名：Mechanics of Materials
• 出版年：2013
• 出版时间：October, 2013
• 年：2013
• 卷：65
• 期：Complete
• 页码：56-65
• 全文大小：3317 K

文摘

A new improved carbon fiber-reinforced pyramidal lattice truss cores sandwich panel is manufactured based on the post-forming process under the hot-press molding method. A series of experimental and analytical studies on the structural mechanical behavior are conducted under the out-of-plane compression, in-plane shear, in-plane compression and three-point bending, providing a visualized insight into the failure mechanisms of all-composite sandwich panels. The predicted collapse limits are in reasonable agreements with the measurements under out-of-plane loading, while significant discrepancies are observed under in-plane loading. Comparisons suggest that the improved structure has a superior comprehensive performance. Besides, an expected improved layer form of the pyramidal truss cores is proposed to overcome the intractable node problem. All these results indicate that much space and opportunities still remain for the improvement and development of structural mechanical performance, even the achievement of multifunctional integration.