Static and Fatigue Mechanical Properties of Polymer Matrix Composite Rods

Abstract:

Tendons (cables or rods) are commonly employed as tension members in civil infrastructure, as well as buildings and offshore engineering structures. This study focuses on reliability evaluation of composite rods consisting of polymer matrix (carbon fiber/glass fiber hybrid thermoplastic composite rods (hybrid composite rods) and basalt fiber/polypropylene composite rod (BF/PP composite rod)). Optical and gravimetric methods were used to characterize the morphologies, including constituent volume fractions, of the composite rods. The hybrid composite rods are braided structures with varying diameters and braid angles. The BF/PP composite rod exhibits slight twisting. The volume fractions of the constituent elements (carbon fiber, glass fiber, basalt fiber, matrix, and void) were evaluated. Tensile and flexural tests were conducted under static and fatigue loadings. During the static tensile test, the stress applied to the composite rods was almost linearly proportional to the strain. The fiber-dominant behaviors of the composite rods were observed. During the static flexural test, the stress-strain relationship was initially linear, but as the stress approached its maximum, deformation became non-linear, and finally, the fibers fractured rapidly. During the fatigue tensile and flexural tests, the regression lines of the full-logarithmic curves showed good agreement with the fatigue test data. In addition, data was collected and statistical analyses were performed to assess the effects of environmental factors, such as temperature, on the static properties of the composite rods.

• Periodical: Key Engineering Materials (Volume 970)
• Pages: 101-111
• DOI: https://doi.org/10.4028/p-2omkqG
• Online since: December 2023
• Authors: Kimiyoshi Naito*
• Keywords: Basalt Fiber, Carbon Fiber, Glass Fiber, Mechanical Properties, Polypropylene, Thermoplastic Epoxy

References

[1] E.G. Nawy: Prestressed concreate: a fundamental approach (Prentice Hall, New York 2009)

[2] M.G. Mangala and B. Haym: Dynamic response of an axially loaded tendon of a tension leg platform. J. Sound Vib. Vol. 293 (2006) p.38.

DOI: 10.1016/j.jsv.2005.09.027

[3] Y. Zhao, J. Yang and Y. He: Preliminary design of a multi-column TLP foundation for a 5-MW offshore wind turbine. Energies Vol. 5 (2012) p.3874.

DOI: 10.3390/en5103874

[4] V. Périer, L. Dieng, L. Gaillet, C. Tessier, and S. Fouvry: Fretting-fatigue behaviour of bridge engineering cables in a solution of sodium chloride. Wear Vol. 267 (2009) p.308.

DOI: 10.1016/j.wear.2008.12.107

[5] U. Meier: Carbon fiber reinforced polymer cables: Why? Why Not? What If? Arab. J. Sci. Eng. Vol. 37 (2012) p.399.

DOI: 10.1007/s13369-012-0185-6

[6] Komatsu Matere fabric laboratory [fa-bo] on https://www.komatsumatere.co.jp/.

[7] Nagase ChemteX Corporation. Process for production of thermoplastic cured epoxy resin with transparency to visible light, and thermoplastic epoxy resin composition. U.S. Patent No. US2014/0194590 A1 (2014).

[8] K. Naito and H. Oguma: Tensile properties of novel carbon/glass hybrid thermoplastic composite rods. Compos. Struct. Vol. 161 (2017) p.23.

DOI: 10.1016/j.compstruct.2016.11.042

[9] K. Naito, H. Oguma and C. Nagai: Temperature-dependent tensile properties of hybrid carbon/glass thermoplastic composite rods. Polym. Compos. Vol. 41 (2020) p.3985.

DOI: 10.1002/pc.25686

[10] K. Naito: Flexural properties of carbon/glass hybrid thermoplastic epoxy composite rods under static and fatigue loadings. Appl. Compos. Mater. Vol. 28 (2021) p.753.

DOI: 10.1007/s10443-021-09893-z

[11] H. Oguma and K. Naito: Hybridization effects on the fatigue properties of novel core-in-sheath-type carbon/glass hybrid thermoplastic composite rods. Fatigue Fract. Eng. Mater. Struct. Vol. 45 (2022) p.3514.

DOI: 10.1111/ffe.13826

[12] K. Naito, H. Oguma, J. Tanks and C. Nagai: Reliability evaluation of novel core-in-sheath-type carbon/glass hybrid thermoplastic composite rods. Mater. syst. Vol. 40 (2023) p.37.

[13] J. Tanks, K. Naito and H. Ueda: Characterization of the static, creep, and fatigue tensile behavior of basalt fiber/polypropylene composite rods for passive concrete reinforcement. Polymers Vol. 13 (2021) p.3136.

DOI: 10.3390/polym13183136

[14] E.A. Turi: Thermal Characterization of Polymeric Materials (Academic Press, New York 1997).

[15] W. Weibull: A statistical distribution function of wide applicability. J. Appl. Mech. Vol. 18 (1951) p.293.

[16] K. Naito, Y. Tanaka, J.M. Yang and Y. Kagawa: Tensile properties of ultrahigh strength PAN-based, ultrahigh modulus pitch-based and high ductility pitch-based carbon fibers. Carbon Vol. 46 (2008) p.189.

DOI: 10.1016/j.carbon.2007.11.001

[17] K. Naito, J.M. Yang and Y. Kagawa: Tensile properties of high strength polyacrylonitrile (PAN)-based and high modulus pitch-based hybrid carbon fibers-reinforced epoxy matrix composite. J. Mater. Sci. Vol. 47 (2012) p.2743.

DOI: 10.1007/s10853-011-6101-8

[18] Y. Qiu and P. Schwartz: Micromechanical behavior of Kevlar-149/S-glass hybrid seven-fiber microcomposites: I. Tensile strength of the hybrid composite. Compos. Sci. Technol. Vol. 47 (1993) p.289.

DOI: 10.1016/0266-3538(93)90037-h

[19] B. Harris: Fatigue in Composites (Woodhead Publishing, Cambridge 2003).

[20] I. Kafodya, G. Xian and H. Li: Durability study of pultruded CFRP plates immersed in water and seawater under sustained bending: Water uptake and effects on the mechanical properties. Compos. Part B. Eng. Vol. 70 (2015) p.138.

DOI: 10.1016/j.compositesb.2014.10.034