凯夫拉短纤维组织/碳纤维带增韧蜂窝夹层板弯曲响应的数值与实验研究

IF 3.2 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Rahul Kumar (Research Scholar), Achchhe Lal (Assistant Professor), B.M. Sutaria (Associate Professor)
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引用次数: 1

摘要

采用碳纤维带和短芳纶纤维组织研究了增韧/非增韧界面蜂窝夹芯板的抗弯性能。本文第一部分采用基于有限元的一阶剪切变形理论,对具有非增韧界面的碳纤维铝蜂窝夹层板进行了弯曲响应分析。第二部分采用三点弯曲试验,对加载速率对平纹和增韧夹层板力学特性的影响进行了实验分析。碳纤维带、凯夫拉纤维短纤维组织、碳纤维带复合凯夫拉纤维短纤维组织的单向和双向缝线采用了四种界面增韧方式。实验结果表明,在不同加载速率下,界面增韧提高了夹层试样的最大载荷和吸收能。利用扫描电镜观察和分析了界面强化的破坏模式和机理。观察到碳纤维带的针脚增加了面片与芯之间的粘附接触,从而防止界面脱粘。增韧碳纤维带界面夹层的峰值载荷和吸能分别比普通夹层增加51%和42.5%,增韧碳纤维带的增韧界面夹层比普通夹层增加14%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Numerical and experimental investigation for flexural response of Kevlar short fiber tissue/carbon fiber belts toughened honeycomb sandwich plate

This paper investigates the flexural behavior of honeycomb sandwich panels with a toughened/untoughened interface using carbon fiber belt and short aramid fiber tissues. In the first part of the paper, bending response analysis of carbon fiber aluminum honeycomb sandwich plates with an untoughened interface is done using finite element-based first-order shear deformation theory. In the second part, experimental analysis is done to examine the effect of loading rates on the mechanical characteristics of plain and toughened sandwich panels using a three-point bending test. Four types of interface toughening are used as unidirectional and bi-directional stitches of carbon fiber belts, Kevlar short-fiber tissues, and carbon fiber belts combined with Kevlar short-fiber tissues. Experimental result shows that interface toughening improves the maximum load and energy absorbed by sandwich specimens for all loading rates. A scanning electron microscope is used to observe and analyze the failure mode and mechanism of strengthening the interface. It is observed that the stitch of the carbon fiber belt increases the adhesion contact between face sheets and core leading to prevent interfacial debonding. The peak load and energy absorptions of carbon fiber belts toughened interface sandwich are increased by 51 % and 42.5 %, respectively, compared with that of the plain sandwich by a small increment of weight (14%).

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来源期刊
Forces in mechanics
Forces in mechanics Mechanics of Materials
CiteScore
3.50
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