Engineering tensile behavior of hybrid carbon fiber/self-reinforced polypropylene composites by bio-inspired fiber discontinuities
Engineering tensile behavior of hybrid carbon fiber/self-reinforced polypropylene composites by bio-inspired fiber discontinuities
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仿生纤维不连续性混合碳纤维/自增强聚丙烯复合材料的工程拉伸行为
DOI：
10.1016/j.compositesb.2019.107502
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发表时间：
2019
影响因子：
13.1
通讯作者：
L. Gorbatikh
中科院分区：
文献类型：
--
作者：
Jun Tang;Y. Swolfs;Arya Aslani;L. Mencattelli;G. Bullegas;S. Pinho;S. Lomov;L. Gorbatikh
层间混杂碳纤维(CF)/自增强聚丙烯(SRPP)复合材料的碳纤维层破坏是影响其拉伸性能的重要因素。在碳层中引入切割，这里称为不连续，是调整其失效行为的一种很有前途的方法。受生物复合材料结构特点的启发，我们设计并制备了碳层中分层排列和多边形排列的混杂复合材料。增加层状图案中的层数可以延缓碳层破坏的发生，从而提高混杂复合材料的抗损伤能力。通过产生从纤维束拔出到纤维束断裂的过渡，实现了多边形图案的渐进性碳层破坏。在整个样品中铺开多边形图案导致了独特的扩散分层分布，这在文献中还没有报道。通过创建具有完全分散的多边形图案的分散纤维束拉出来实现伪延性行为。所得混杂纤维/硫化聚丙烯复合材料表现出罕见的刚性(10 GPA)和韧性(约16%的破坏应变)的组合，伪韧性应变超过14%。本文提出并证明了利用不连续面来设计混杂复合材料拉伸行为的概念。
Carbon fiber layer failure is vital for the tensile behavior of interlayer hybrid carbon fiber (CF)/self-reinforced polypropylene (SRPP) composites. Introducing cuts, termed here as discontinuities, into the carbon layer is a promising way to tailor its failure behavior. Inspired by structural features of biological composites, we designed and produced hybrid composites with hierarchical and polygonal arrangements of discontinuities in the carbon layer. Increasing the number of levels in the hierarchical patterns delayed the onset of carbon layer failure, hence improving the damage resistance of the hybrid composites. A progressive carbon layer failure was achieved with the polygonal patterns by creating a transition from fiber bundle pull-out to fiber bundle fracture. Spreading the polygonal patterns throughout the specimen resulted in a unique diffused delamination distribution that has not been reported in the literature. Pseudo-ductile behavior was achieved by creating dispersed fiber bundle pull-out with the fully dispersed polygonal patterns. The resulting hybrid CF/SRPP composites demonstrated a rare combination of stiffness (10 GPa) and ductility (~16% failure strain) with a pseudo-ductile strain over 14%. This paper delivers and proves the concept of utilizing discontinuities to engineer the tensile behavior of hybrid composites.
影响因子：
9.1
作者：
Bullegas G
通讯作者：
Bullegas G
影响因子：
9.1
作者：
G. Bullegas;J. Benoliel;Pier Luigi Fenelli;S. Pinho;S. Pimenta
通讯作者：
G. Bullegas;J. Benoliel;Pier Luigi Fenelli;S. Pinho;S. Pimenta
影响因子：
4.5
作者：
Burn, D. T.;Harper, L. T.;Thomason, J.
通讯作者：
Thomason, J.