Direct observation of micro delamination in graphene oxide incorporated carbon fiber/epoxy composite via in-situ tensile test
Direct observation of micro delamination in graphene oxide incorporated carbon fiber/epoxy composite via in-situ tensile test
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DOI：
10.1016/j.compscitech.2019.04.006
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发表时间：
2019-06
影响因子：
9.1
通讯作者：
Nitai Chandra Adak;Suman Chhetri;Satvik Sabarad;H. Roy;N. C. Murmu;P. Samanta;Tapas Kuila
中科院分区：
文献类型：
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作者：
Nitai Chandra Adak;Suman Chhetri;Satvik Sabarad;H. Roy;N. C. Murmu;P. Samanta;Tapas Kuila
微分层分析是目前碳纤维增强环氧树脂复合材料分层失效分析中的一个关键问题。用填料提高碳纤维/环氧复合材料的抗分层性能以及用无损检测技术研究碳纤维/环氧复合材料的微分层是材料研究者十分关注的问题。本文中，将0.2wt%的氧化石墨烯（GO）纳米填料掺入CF/环氧树脂复合材料中以抵抗分层期间的微裂纹形成，并在场发射扫描电子显微镜的试样室中使用微测试仪进行原位拉伸测试以研究混杂复合材料的微分层行为。据观察，GO改性的环氧树脂基体显示出比纯环氧树脂更好的基体抗开裂性。GO（0.2wt%）/CF/环氧树脂复合材料的基体抗开裂性的改善是由于GO改性基体与CF之间良好的粘附。除了实验研究之外，还进行了混合复合材料的有限元分析，以预测每个层中产生的应力，因为通过实验研究是不可能的。Tsai-Wu失效准则也被应用于分析复合材料层合板中每层的损伤。
The microdelamination analysis is a critical issue in current failure analysis of delamination phenomenon in carbon fiber (CF) reinforced epoxy composites. Both, the improvement of delamination resistance of the CF/epoxy composites using filler materials and the microdelamination studies of these hybrid composites through nondestructive technique are great concern to the material researchers. Herein, 0.2 wt% graphene oxide (GO) nanofiller was incorporated in CF/epoxy composite to resist the micro crack formation during delamination and in-situ tensile test was conducted to investigate the microdelamination behavior of the hybrid composite using a microtester in the specimen chamber of a field emission scanning electron microscope. It was observed that the GO modified epoxy matrix showed better matrix cracking resistance than the pure epoxy resin. The improvement in matrix cracking resistance of the GO (0.2 wt%)/CF/epoxy composite is due to the good adhesion between GO modified matrix and CF. Besides the experimental study, Finite Element Analysis of the hybrid composite was performed to predict the generated stress in each ply as it is not possible through experimental study. Tsai-Wu failure criteria was also applied to analyze the damage in each ply of the composite laminate.