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Hybrid effects and interactive failure mechanisms of hybrid fiber composites under flexural loading: Carbon/Kevlar, carbon/glass, carbon/glass/Kevlar by Hongyong Jiang; Xuefeng Liu; Shulan Jiang; Yiru Ren is a Engineering article available to read on EtoBox.

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Regulatable and customized mechanical properties of aeronautical composites, e.g., stiffness, strength, elongation, energy-absorption (EA), etc., can be flexibly obtained with fiber hybridization, but the hybridization design is challenging due to complex hybrid effects. Hence, hybrid effects and interactive failure mechanisms of carbon-glass-Kevlar hybrid fiber reinforced polymer (HFRP) composites under flexural loading are revealed. Double-/multi-fiber HFRP (carbon/glass, carbon/Kevlar and carbon/glass/Kevlar) with different hybrid ratios and stacking sequences are proposed. Experimental specimens are fabricated and a series of flexural tests are conducted to assess flexural properties and cost-effectiveness. It is found that HFRP has 152.9% and 76.2% higher EA than CF9 and KF9 which benefits from the combination of ductile Kevlar-fiber and strong carbon-fiber. Different hybrid effects are also produced by different fiber-hybridizations, e.g., +0.866 (CF5/KF4), +0.72 (CF5/GF2/KF2) in EA. From microscopic characterization, the combined brittle/ductile breakage, buckling, fiber-splitting, crack suppression and underlying interactions are revealed to explain the improvements. It is

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Author

Hongyong Jiang; Xuefeng Liu; Shulan Jiang; Yiru Ren

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Engineering (Physical Sciences)