Title: Investigate the In-Plane Shear Properties Improvement of Carbon Fiber Reinforced Polymer Laminate Enhanced with Carbon Nanofiber Z-threads by Using Digital Image Correlation System

Authors: Obaidul Hasan, Ryan Warren, Kuang-Ting Hsiao

DOI: 10.33599/nasampe/s.25.0082

Abstract: In-plane shear strength is an important issue for the structural integrity of carbon fiber reinforced polymers (CFRP). In this study [± 45°]4s in-plane shear test was performed for both Z-threaded CFRP (ZT-CFRP) and traditional CFRP. A newly developed proprietary Bisphenol-F based epoxy blend was used in this study. A significant improvement of +24% in the in-plane shear strength for ZT-CFRP was observed. There was a notable difference found in the failure modes between control CFRP and ZT-CFRP samples. Intralaminar and interlaminar delamination modes were noticed in control CFRP samples spreading to all plies whereas the ZT-CFRP samples experienced a confined failure in the interlaminar region. Digital image correlation (DIC) showed more uniform stress distribution and higher strain in ZT-CFRP, which suggested ZT-CFRP was stronger and tougher under the in-plane shear testing. Microscopic analysis of failure mode indicated that the z-threaded CNFs act as effective nano-structural reinforcement between and inside the laminas to keep the interlaminar/intralaminar bonding stronger.

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Conference: SAMPE 2025

Publication Date: 2025/05/19

SKU: TP25-0000000082

Pages: 14

Price: $28.00