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Experimental analysis of ILSS of glass fibre reinforced thermoplastic and thermoset textile composites enhanced with multiwalled carbon nanotubes


In this study experimental investigation of interlaminar shear strength of glass fibre reinforced thermoplastic polyurethane (TPU) and epoxy based thermosets composites enhanced with multi walled carbon nanotubes (MWCNTs) is presented, and comparison is made between thermoplastic and thermosets composites. Suspension of MWCNTs in TPU and epoxy matrix was prepared using magnetic stirring and sonication technique. Both thermoplastic reinforced glass fibre and thermosets reinforced glass fibre composites were manufactured using hand layup technique. Carbon nanotubes were added in the concentrations of 0.1 %weight, 0.3 %weight and 0.5 %weight in both types of composites. Results showed that as the concentration of CNTs increases, the ILSS of the nanocomposites was also improved. With an addition of 0.5 % weight CNTs, there was improvement of 24.37 % in ILSS in epoxy based composites and 10.05 % enhancement in thermoplastic polyurethane reinforced glass fibre composites. The average ILSS obtained for thermoplastic polyurethane composites was less than that of epoxy composites. The TPU based composites also demonstrated inelastic deformations without any trace of brittle fracture. The pristine epoxy based composites on the other hand did show inelastic deformations followed by brittle fracture. Higher concentrations of MWCNTs led to an absence of brittle fracture during the tests, owing to the crack bridging effect of the CNTs.

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  1. [1]

    M. Kadlec, L. Novakova and R. Ruzek, An experimental investigation of factors considered for the short beam shear strength evaluation of carbon fiber-reinforced thermoplastic laminates, Journal of Testing and Evaluation, 42 (3) (2014) 581–592.

    Article  Google Scholar 

  2. [2]

    M. Nasir et al., Tensile strength changeability of multilayered composites, fabricated through optimized" VARTM" technology, an experimental approach. university of engineering and technology Taxila, Technical Journal, 20 (4) (2015) 55.

    Google Scholar 

  3. [3]

    Z. Fan, M. H. Santare and S. G. Advani, Interlaminar shear strength of glass fiber reinforced epoxy composites enhanced with multi-walled carbon nanotubes, Composites Part A: Applied Science and Manufacturing, 39 (3) (2008) 540–554.

    Article  Google Scholar 

  4. [4]

    L. W. Byrd and V. Birman, Effectiveness of z-pins in preventing delamination of co-cured composite joints on the example of a double cantilever test, Composites Part B: Engineering, 37 (4) (2006) 365–378.

    Article  Google Scholar 

  5. [5]

    S. Mazumdar, Composites manufacturing: Materials, product, and process engineering, CrC press (2001).

    Book  Google Scholar 

  6. [6]

    L. K. Jain and Y.-W. Mai, On the effect of stitching on mode I delamination toughness of laminated composites, Composites Science and Technology, 51 (3) (1994) 331–345.

    Article  Google Scholar 

  7. [7]

    P. Zinck, E. Mäder and J. Gerard, Role of silane coupling agent and polymeric film former for tailoring glass fiber sizings from tensile strength measurements, Journal of Materials Science, 36 (21) (2001) 5245–5252.

    Article  Google Scholar 

  8. [8]

    J. Zhu et al., Processing a glass fiber reinforced vinyl ester composite with nanotube enhancement of interlaminar shear strength, Composites Science and Technology, 67 (7) (2007) 1509–1517.

    Article  Google Scholar 

  9. [9]

    A. Godara et al., Influence of carbon nanotube reinforcement on the processing and the mechanical behaviour of carbon fiber/epoxy composites, Carbon, 47 (12) (2009) 2914–2923.

    Article  Google Scholar 

  10. [10]

    V. Chandrasekaran, S. Advani and M. Santare, Role of processing on interlaminar shear strength enhancement of epoxy/glass fiber/multi-walled carbon nanotube hybrid composites, Carbon, 48 (13) (2010) 3692–3699.

    Article  Google Scholar 

  11. [11]

    V. Chandrasekaran, S. Advani and M. Santare, Influence of resin properties on interlaminar shear strength of glass/epoxy/MWNT hybrid composites, Composites Part A: Applied Science and Manufacturing, 42 (8) (2011) 1007–1016.

    Article  Google Scholar 

  12. [12]

    M. Ayatollahi, S. Shadlou and M. Shokrieh, Fracture toughness of epoxy/multi-walled carbon nanotube nanocomposites under bending and shear loading conditions, Materials & Design, 32 (4) (2011) 2115–2124.

    Article  Google Scholar 

  13. [13]

    Y. Liu et al., Role of matrix modification on interlaminar shear strength of glass fibre/epoxy composites, Composites Part B: Engineering, 43 (1) (2012) 95–98.

    Article  Google Scholar 

  14. [14]

    N. A. Siddiqui, S. U. Khan and J.-K. Kim, Experimental torsional shear properties of carbon fiber reinforced epoxy composites containing carbon nanotubes, Composite Structures, 104 (2013) 230–238.

    Article  Google Scholar 

  15. [15]

    K. C. Shekar, B. A. Prasad and N. E. Prasad, Interlaminar shear strength of multi-walled carbon nanotube and carbon fiber reinforced, epoxy-matrix hybrid composite, Procedia Materials Science, 6 (2014) 1336–1343.

    Article  Google Scholar 

  16. [16]

    V. M. Boddu et al., Energy dissipation and high-strain rate dynamic response of E-glass fiber composites with anchored carbon nanotubes, Composites Part B: Engineering, 88 (2016) 44–54.

    Article  Google Scholar 

  17. [17]

    X. Zhang et al., Design of glass fiber reinforced plastics modified with CNT and pre-stretching fabric for potential sports instruments, Materials & Design, 92 (2016) 621–631.

    Article  Google Scholar 

  18. [18]

    L. Franco, M. L. de Alencastro Graça and F. Silva, Interlaminar shear strength and fractographic evaluation with varying temperature and moisture content of thermoplastic composites, Applied Mechanics and Materials, Trans Tech Publ., 3–4 (2005) 179–184.

    Google Scholar 

  19. [19]

    K. V. Kumar, M. Safiulla and A. K. Ahmed, An experimental evaluation of fiber reinforced polypropylene thermoplastics for aerospace applications, Journal of Mechanical Engineering, 43 (2) (2014) 92–97.

    Article  Google Scholar 

  20. [20]

    P. Jaeschke et al., Investigation on interlaminar shear strength properties of disc laser machined consolidated CFPPS laminates, Polymer Letters, 5 (3) (2011) 238–245.

    Article  Google Scholar 

  21. [21]

    H. Qaiser et al., Optimization of interlaminar shear strength behavior of anodized and unanodized ARALL composites fabricated through VARTM process, International Journal of Material Forming, 8 (3) (2015) 481–493.

    Article  Google Scholar 

  22. [22]

    D. S. Ahmed, A. J. Haider and M. Mohammad, Comparesion of functionalization of multi-walled carbon nanotubes treated by oil olive and nitric acid and their characterization, Energy Procedia, 36 (2013) 1111–1118.

    Article  Google Scholar 

  23. [23]

    N. A. Buang et al., Characteristic of mild acid functionalized multiwalled carbon nanotubes towards high dispersion with low structural defects, Digest Journal of Nanomaterials and Biostructures, 7 (1) (2012) 33–39.

    Google Scholar 

  24. [24]

    V. Datsyuk et al., Chemical oxidation of multiwalled carbon nanotubes, Carbon, 46 (6) (2008) 833–840.

    Article  Google Scholar 

  25. [25]

    P.-C. Ma et al., Dispersion and functionalization of carbon nanotubes for polymer-based nanocomposites: A review, Composites Part A: Applied Science and Manufacturing, 41 (10) (2010) 1345–1367.

    Article  Google Scholar 

  26. [26]

    M. W. Marshall, S. Popa-Nita and J. G. Shapter, Measurement of functionalised carbon nanotube carboxylic acid groups using a simple chemical process, Carbon, 44 (7) (2006) 1137–1141.

    Article  Google Scholar 

  27. [27]

    E. Rogel-Hernández et al., Side-wall functionalization of multi-walled carbon nanotubes with t-butyl diazoacetate, Journal of the Mexican Chemical Society, 55 (1) (2011) 07–10.

    Google Scholar 

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Corresponding author

Correspondence to Muhammad Ali Nasir.

Additional information

Recommended by Editor Chongdu Cho

Muhammad Ali Nasir is working as an Associate Professor and Director of Composite Materials & Smart Structures Laboratory, Department of Mechanical Engineering, University of Engineering & Technology, Taxila, Pakistan. He is doing research in the areas of Advanced Materials Science, Nanocomposites, Smart structures, Nanomaterials, Fiber metal laminates, Fractographic characterization of nano materials, Materials Characterization.

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Zahid, S., Nasir, M.A., Nauman, S. et al. Experimental analysis of ILSS of glass fibre reinforced thermoplastic and thermoset textile composites enhanced with multiwalled carbon nanotubes. J Mech Sci Technol 33, 197–204 (2019).

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  • Epoxy
  • Glass fibre
  • Interlaminar shear strength
  • Multiwalled carbon nanotubes
  • Thermoplastic polyurethane