Effects of Carbon Nanomaterial Reinforcement on Composite Joints Under Cyclic and Impact Loading
Tan, Meng Hwee
Kwon, Young W.
Pollak, Randall D.
MetadataShow full item record
This study investigated the influence of Multi-Walled Carbon Nanotubes (MWCNTs) and Carbon Nanofibers (CNFs) reinforcement on the behavior of Carbon Fiber Reinforced Polymer (CFRP) joint interface under cyclic and impact loading. Test coupons with pre-cracks were fabricated via Vacuum Assisted Resin Transfer Molding (VARTM) technique with 7.5g/m2 of MWCNTs or CNFs dispersed at the joint interface ahead of the crack tip. The test coupons were loaded in 3-point bending at 2Hz and 10Hz frequencies for the cyclic loading test. The CNTs and CNFs-reinforced samples displayed higher stiffness and had significantly shorter crack propagation lengths under the same loading cycles. Resistance to crack propagation was evident in the reinforced samples as observed using an optical microscope. Similar sets of reinforced as well as non-reinforced samples were subjected to low energy impact tests and their dynamic responses and failures were also compared. CNTs-reinforcement samples experienced failure at higher impact force as compared to non-reinforced samples. However, further testing was recommended to establish the effects of CNFs reinforcement under impact loading. The test results suggested that proper reinforcement of the joint interface using carbon nanomaterial can significantly delay the crack growth, resulting in improvement of composite structural integrity and its service life.
Showing items related by title, author, creator and subject.
Shelley, Dustin A. (Monterey, CA; Naval Postgraduate School, 2020-12);High specific strength and stiffness properties of carbon fiber composite cylinders make them an ideal material for internal pressure and blast applications. While previous research investigates failure loading and modes ...
Kadlec, Lauren N. (Monterey, CA; Naval Postgraduate School, 2022-03);The use of composite materials in naval applications has been increasing, primarily due to their high strength-to-weight ratio. However, additional study is needed on the impact of cyclic loading on these materials. The ...
Conner, Ryan P. (Monterey, California. Naval Postgraduate School, 2012-06);In this study composite materials were tested in different fluid environments to determine the role of Fluid Structure Interaction with these composites under a lower velocity impact. The purpose of this research is to ...