Energy absorption characteristics of expanded graphite-reinforced carbon/Elium and carbon/epoxy composites exposed to cryogenic conditions for hydrogen storage application
水素貯蔵用途向け極低温条件下での膨張黒鉛強化炭素/Eliumおよび炭素/エポキシ複合材料のエネルギー吸収特性 (AI 翻訳)
J Jefferson Andrew, Jabir Ubaid, Chanaka Sandaruwan, Yarjan Abdul Samad, Wesley J. Cantwell, Kamran A. Khan, Rehan Umer
🤖 gxceed AI 要約
日本語
本研究は、極低温水素貯蔵用炭素繊維複合材料の耐衝撃性に対し、膨張黒鉛ナノ強化材、マトリックス種、積層板曲率の複合効果を初めて調査した。0.1wt.%のEG最適添加により、剛性、最大荷重、弾性エネルギー回復が向上し、CF/Eliumではエネルギー吸収量が11%増加した。曲面板での試験により、マトリックス依存の損傷モード遷移が明らかになり、極低温耐性に優れたCF/Eliumが有望であることを示した。
English
This study investigates the combined effects of expanded graphite (EG) nanofiller, matrix type, and laminate curvature on low-velocity impact behavior of carbon-fiber composites for cryogenic hydrogen storage. Optimal 0.1 wt.% EG enhances stiffness and energy recovery, with EG-reinforced CF/Elium achieving 11% higher absorbed energy and retaining elasticity after cryogenic exposure. Curved laminates reveal matrix-dependent damage transitions, highlighting CF/Elium's superior low-temperature resistance.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
日本は水素社会の実現に向け、液化水素貯蔵タンクの軽量化・耐極低温性が重要課題。本研究成果は、炭素繊維複合材料のマトリックス選定とナノ添加剤設計に指針を与え、国産水素タンクの競争力向上に寄与する可能性がある。
In the global GX context
This paper provides a novel materials design framework for damage-tolerant composites in cryogenic hydrogen storage, directly relevant to global hydrogen infrastructure development. The comparative analysis of epoxy vs. thermoplastic Elium matrices and the role of nanofillers offer practical insights for tank manufacturers targeting cost-effective and durable storage solutions.
👥 読者別の含意
🔬研究者:Advances understanding of nanofiller-matrix-geometry interplay for cryogenic composite design, with validated optimal loading and damage mechanisms.
🏢実務担当者:Offers guidance on selecting matrix (Elium) and nanofiller (0.1 wt.% EG) for improved impact resistance in hydrogen storage tanks.
📄 Abstract（原文）
This study investigates, for the first time, the combined effects of expanded graphite (EG) nano-reinforcement, matrix type (epoxy vs. Elium), laminate curvature, and cryogenic conditioning on the low-velocity impact (LVI) behavior of carbon-fiber (CF) composites engineered for hydrogen storage applications. Unlike prior work limited to flat laminates and ambient conditions, this study uniquely integrates nanofiller effects, structural geometry, and cryogenic exposure. Incorporating worm-like EG into both matrices simultaneous enhances stiffness, peak load, and elastic energy recovery at ultra-low filler content. An optimal EG loading of 0.1 wt.% is identified, forming an effective stress-bridging network, as confirmed by Raman mapping and interlaminar shear strength improvements of ∼22% (CF/epoxy) and ∼23% (CF/Elium). Distinct reinforcement mechanisms are revealed, chemical stiffening in CF/epoxy and plasticity-driven energy dissipation in CF/Elium leading to fundamentally different impact responses. Notably, EG-reinforced CF/Elium laminates achieve a 11% higher absorbed energy than neat one and retain significant elastic energy after cryogenic conditioning, demonstrating exceptional low-temperature resistance. Curved laminates, representative of tank geometries, further reveal matrix-dependent transitions between elastic and plastic dissipation modes, with EG-reinforced CF/Elium showing superior stiffness recovery and delayed instability. Overall, this work establishes a novel framework linking nanofiller, matrix, and geometry for designing damage-tolerant composites for cryogenic hydrogen storage.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1080/15376494.2026.2676186first seen 2026-06-18 05:43:50
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