TY - JOUR
T1 - Direct three-dimensional imaging of the fracture of fiber-reinforced plastic under uniaxial extension
T2 - Effect of adhesion between fibers and matrix
AU - Saito, Haruko
AU - Aoyanagi, Yuko
AU - Mihara, Takaaki
AU - Tanaka, Teruhisa
AU - Higuchi, Takeshi
AU - Morita, Hiroshi
AU - Jinnai, Hiroshi
N1 - Funding Information:
We are grateful to NEDO for support through the Japanese National Project “Nano-Structured Polymer Project” by the Ministry of Economy, Trade and Industry . H.J. gratefully acknowledges the financial support received through Grants-in-Aid Nos. 16H02288 and 16K14001 from the Ministry of Education, Science, Sports and Culture .
Publisher Copyright:
© 2017 Elsevier Ltd
PY - 2017/5/5
Y1 - 2017/5/5
N2 - The three-dimensional morphology and a mechanical property of a fiber-reinforced plastic (FRP) have been investigated under uniaxial extension. A custom tensile apparatus for X-ray computerized tomography was developed for this purpose. The two FRPs used in the present study consisted of nylon 6 with glass fibers. In one of the FRPs, the fiber surfaces were treated to adhere to the nylon 6. It was observed that the fibers tended to align along the extension axis, and that cavitation occurred simultaneously during the extension. In the case of the FRP with glass fibers without any surface modification (hereafter, referred as “neat” glass fibers), void formation was dominant over the whole extension range. In the case of the FRP with surface treatment, fiber alignment occurred first and was followed by void formation. A numerical simulation was carried out to study the stress concentration around a fiber with such morphological changes during extension. Through quantitative measurements of fiber orientation and void volume, together with predictions from the numerical simulations, the effect of fiber/matrix adhesion on the morphological developments and mechanical properties of the FRPs was discussed.
AB - The three-dimensional morphology and a mechanical property of a fiber-reinforced plastic (FRP) have been investigated under uniaxial extension. A custom tensile apparatus for X-ray computerized tomography was developed for this purpose. The two FRPs used in the present study consisted of nylon 6 with glass fibers. In one of the FRPs, the fiber surfaces were treated to adhere to the nylon 6. It was observed that the fibers tended to align along the extension axis, and that cavitation occurred simultaneously during the extension. In the case of the FRP with glass fibers without any surface modification (hereafter, referred as “neat” glass fibers), void formation was dominant over the whole extension range. In the case of the FRP with surface treatment, fiber alignment occurred first and was followed by void formation. A numerical simulation was carried out to study the stress concentration around a fiber with such morphological changes during extension. Through quantitative measurements of fiber orientation and void volume, together with predictions from the numerical simulations, the effect of fiber/matrix adhesion on the morphological developments and mechanical properties of the FRPs was discussed.
KW - Dynamical 3D imaging
KW - FRP
KW - Fracture process
KW - X-ray CT
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U2 - 10.1016/j.polymer.2017.01.072
DO - 10.1016/j.polymer.2017.01.072
M3 - Article
AN - SCOPUS:85013170613
VL - 116
SP - 556
EP - 564
JO - Polymer (United Kingdom)
JF - Polymer (United Kingdom)
SN - 0032-3861
ER -