Laser induced graphene in fiberglass-reinforced composites for strain and damage sensing
Laser induced graphene in fiberglass-reinforced composites for strain and damage sensing
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DOI：
10.1016/j.compscitech.2020.108367
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发表时间：
2020-10-20
影响因子：
9.1
通讯作者：
Sodano, Henry
中科院分区：
文献类型：
--
作者：
Groo, LoriAnne;Nasser, Jalal;Sodano, Henry
纤维增强复合材料的结构健康监测是至关重要的，因为它们在具有挑战性的结构应用中使用，其中需要低密度并且设计通常使用低安全系数。为了减少外部传感器监测复合结构的需要，最近的注意力已经转向具有集成传感能力的多功能材料。本研究利用激光诱导石墨烯（LIG）技术构建了一种多功能结构，该结构具有嵌入式压阻特性，可用于玻璃纤维增强复合材料的应变和损伤的同时原位监测。LIG层在制造过程中通过转印到预浸料的表面而被整合，然后被铺设成层片堆叠，并且因此位于玻璃纤维增强复合材料的层间区域中。在这项工作中使用的方法是简单的，不需要处理或修改的商业玻璃纤维预浸料之前，LIG转移印刷，这是有前途的工业规模的使用。通过三点弯曲和拉伸试验，证明了压阻夹层在监测应变和损伤方面的性能。此外，观察到玻璃纤维复合材料的层间性能在很大程度上保持与LIG存在于复合材料的层间区域，而阻尼性能被发现得到改善。因此，这项工作通过具有成本效益和可扩展的过程引入了一种具有高阻尼和完全集成的传感能力的新型多功能材料。
Structural health monitoring of fiber-reinforced composite materials is of critical importance due to their use in challenging structural applications where low density is required and the designs typically use a low factor of safety. In order to reduce the need for external sensors to monitor composite structures, recent attention has turned to multifunctional materials with integrated sensing capabilities. This work use laser induced graphene (LIG) to create multifunctional structure with embedded piezoresistivity for the simultaneous and in-situ monitoring of both strain and damage in fiberglass-reinforced composites. The LIG layers are integrated during the fabrication process through transfer printing to the surface of the prepreg before being laid up into the ply stack, and are thus located in the interlaminar region of the fiberglass-reinforced composite. The methods used in this work are simple and require no treatment or modification to the commercial fiberglass prepreg prior to LIG transfer printing which is promising for industrial scale use. The performance of the piezoresistive interlayer in monitoring both strain and damage in-situ are demonstrated via three-point bend and tensile testing. Additionally, the interlaminar properties of the fiberglass composites were observed to be largely maintained with the LIG present in the interlaminar region of the composite, while the damping properties were found to be improved. This work therefore introduces a novel multifunctional material with high damping and fully integrated sensing capabilities through a cost-effective and scalable process.