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Fiber-Reinforced Viscoelastomers Show Extraordinary Crack Resistance That Exceeds Metals

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Title: Fiber-Reinforced Viscoelastomers Show Extraordinary Crack Resistance That Exceeds Metals
Authors: Cui, Wei Browse this author
King, Daniel R Browse this author
Huang, Yiwan Browse this author
Chen, Liang Browse this author
Sun, Tao Lin Browse this author
Guo, Yunzhou Browse this author
Saruwatari, Yoshiyuki Browse this author
Hui, Chung‐Yuen Browse this author
Kurokawa, Takayuki Browse this author
Gong, Jian Ping Browse this author →KAKEN DB
Keywords: crack resistance
energy dissipation density
force transfer length
modulus ratio
soft fiber‐reinforced polymers
Issue Date: 6-Aug-2020
Journal Title: Advanced Materials
Volume: 32
Issue: 31
Start Page: 1907180
Publisher DOI: 10.1002/adma.201907180
PMID: 32583491
Abstract: Soft fiber‐reinforced polymers (FRPs), consisting of rubbery matrices and rigid fabrics, are widely utilized in industry because they possess high specific strength in tension while allowing flexural deformation under bending or twisting. Nevertheless, existing soft FRPs are relatively weak against crack propagation due to interfacial delamination, which substantially increases their risk of failure during use. In this work, a class of soft FRPs that possess high specific strength while simultaneously showing extraordinary crack resistance are developed. The strategy is to synthesize tough viscoelastic matrices from acrylate monomers in the presence of woven fabrics, which generates soft composites with a strong interface and interlocking structure. Such composites exhibit fracture energy, Γ , of up to 2500 kJ m−2, exceeding the toughest existing materials. Experimental elucidation shows that the fracture energy obeys a simple relation, Γ = W · l T, where W is the volume‐weighted average of work of extension at fracture of the two components and l T is the force transfer length that scales with the square root of fiber/matrix modulus ratio. Superior Γ is achieved through a combination of extraordinarily large l T (10–100 mm), resulting from the extremely high fiber/matrix modulus ratios (104–105), and the maximized energy dissipation density, W . The elucidated quantitative relationship provides guidance toward the design of extremely tough soft composites.
Rights: This is the peer reviewed version of the following article:, which has been published in final form at 10.1002/adma.201907180. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.
Type: article (author version)
Appears in Collections:生命科学院・先端生命科学研究院 (Graduate School of Life Science / Faculty of Advanced Life Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 龔 剣萍 (Gong Jian Ping)

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