TY - GEN
T1 - Mechanical properties of novel carbon/glass fiber hybrid rod for tendons
AU - Oguma, H.
AU - Naito, K.
N1 - Funding Information:
This research was promoted by COI program "Construction of next-generation infrastructure using innovative materials - Realization of a safe and secure society that can coexist with the Earth for centuries - supported by MEXT and JST.
Publisher Copyright:
© 2016, European Conference on Composite Materials, ECCM. All rights reserved.
PY - 2016
Y1 - 2016
N2 - In the present work, novel carbon/glass hybrid thermoplastic composite rods have been developed. Three types of the hybrid rod with different carbon/glass ratios were fabricated. To investigate mechanical properties of the hybrid rods, tensile tests and fatigue tests were conducted. In the tensile tests, tensile modulus and strength increased with increasing volume fraction of carbon fiber. The Weibull statistical distributions of the tensile strength indicated that the hybrid rod with smaller volume fraction of void and higher strength showed the narrow strength distribution. Fatigue tests were carried out under stress ratio of R = 0.1 until 107 cycles. Fatigue strengths of the hybrids rods were almost 30% of the tensile strength, and that was lower than anticipated. To investigate the reason of the lower fatigue strength, cross section of the hybrid rods were observed in detail. As a result, there existed voids in the polymer mainly due to the volatilization of solvent. Small voids were also existing in the carbon fiber bundles. Void can affect the force transmission between the fibers, and it can also be an initiation site of crack. The results indicate that production process strongly affect the mechanical properties of the hybrid rods.
AB - In the present work, novel carbon/glass hybrid thermoplastic composite rods have been developed. Three types of the hybrid rod with different carbon/glass ratios were fabricated. To investigate mechanical properties of the hybrid rods, tensile tests and fatigue tests were conducted. In the tensile tests, tensile modulus and strength increased with increasing volume fraction of carbon fiber. The Weibull statistical distributions of the tensile strength indicated that the hybrid rod with smaller volume fraction of void and higher strength showed the narrow strength distribution. Fatigue tests were carried out under stress ratio of R = 0.1 until 107 cycles. Fatigue strengths of the hybrids rods were almost 30% of the tensile strength, and that was lower than anticipated. To investigate the reason of the lower fatigue strength, cross section of the hybrid rods were observed in detail. As a result, there existed voids in the polymer mainly due to the volatilization of solvent. Small voids were also existing in the carbon fiber bundles. Void can affect the force transmission between the fibers, and it can also be an initiation site of crack. The results indicate that production process strongly affect the mechanical properties of the hybrid rods.
KW - Fatigue strength
KW - Hybrid material
KW - Tensile strength
KW - Volume fraction
KW - Weibull modulus
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M3 - Conference contribution
AN - SCOPUS:85018616206
T3 - ECCM 2016 - Proceeding of the 17th European Conference on Composite Materials
BT - ECCM 2016 - Proceeding of the 17th European Conference on Composite Materials
PB - European Conference on Composite Materials, ECCM
T2 - 17th European Conference on Composite Materials, ECCM 2016
Y2 - 26 June 2016 through 30 June 2016
ER -