Multiaxial Damage Characterization of Carbon/Epoxy Angle-Ply Laminates under Static Tension by Combining In Situ Microscopy with Acoustic Emission
Multiaxial Damage Characterization of Carbon/Epoxy Angle-Ply Laminates under Static Tension by Combining In Situ Microscopy with Acoustic Emission
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DOI：
10.3390/app8112021
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发表时间：
2018-11-01
影响因子：
2.7
通讯作者：
Pyl, Lincy
中科院分区：
文献类型：
--
作者：
Kalteremidou, Kalliopi-Artemi;Murray, Brendan R.;Pyl, Lincy
研究碳/环氧复合材料的损伤过程仍然是一个具有挑战性的任务，即使经过多年的分析和研究。特别是在多轴应力状态下，损伤的发展是一种随机现象。在目前的工作中，提出了一种组合的无损检测方法，以调查从静态拉伸载荷的碳纤维增强环氧树脂复合材料的损伤。本文采用平面角铺设层合板研究了多轴应力状态对层合板力学性能的影响。原位显微镜与声发射相结合，以定性和定量地估计层合板中的损伤序列。同时，数字图像相关被用作应变测量和损伤指示的支持工具。重要的结论，突出剪切载荷的主导影响，导致推导出准确的损伤标准的发展是至关重要的。当前手稿中提供的数据在正在进行的研究期间用作疲劳载荷下相同材料的损伤表征的输入。
Investigating the damage progression in carbon/epoxy composites is still a challenging task, even after years of analysis and study. Especially when multiaxial stress states occur, the development of damage is a stochastic phenomenon. In the current work, a combined nondestructive methodology is proposed in order to investigate the damage from the static tensile loading of carbon fiber reinforced epoxy composites. Flat angle-ply laminates are used to examine the influence of multiaxial stress states on the mechanical performance. In situ microscopy is combined with acoustic emission in order to qualitatively and quantitatively estimate the damage sequence in the laminates. At the same time, digital image correlation is used as a supporting tool for strain measurements and damage indications. Significant conclusions are drawn, highlighting the dominant influence of shear loading, leading to the deduction that the development of accurate damage criteria is of paramount importance. The data presented in the current manuscript is used during ongoing research as input for the damage characterization of the same material under fatigue loads.