Experimental study on the mechanical characteristics of 3D spacer grille fabric composites
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摘要: 以三维连体织物格栅夹芯材料为研究对象, 研究其在平压、 剪切载荷作用下的力学特性与破坏模式, 并考察格栅分布密度、 厚度和泡沫填充等对力学性能的影响, 揭示纤维芯柱间的协同作用。结果表明: 三维连体织物格栅复合材料及其夹芯材料平压及剪切性能随芯柱纬向间距的增大而减小; 三维连体织物格栅夹芯材料芯柱之间的协同作用随着芯柱纬向间距的增大而逐渐增大; 大厚度三维连体织物格栅复合材料平压破坏模式主要为芯柱失稳, 最终芯柱断裂破坏, 剪切破坏模式为芯柱受剪根部断裂。Abstract: 3D spacer grille fabric composites were developed in this paper. Its mechanical characteristics under flatwise compressive and shear loads were analyzed, and the effects of pile distance, pile height and foam on the mechanical properties were investigated. The results indicate that the flatwise compressive and shear properties of 3D spacer grille fabric composites decrease with the pile distance increasing. After filling the foam, synergy effects between the piles increase with the increace of pile distance. The failure modes of heavy-thickness spacer fabric composites are pile instability under flatwise compression, and fractured at the joint of pile and facesheet under shear load.
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Keywords:
- grille structure /
- 3D spacer fabric /
- sandwich composites /
- composites /
- mechanical properties
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