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Year 2021, Volume: 5 Issue: 1, 7 - 14, 31.03.2021

Abstract

References

  • [1] Làszló, P. K. and George, S. S. (2003). Mechanics of Composites Structures. Cambrige University Press: New York.
  • [2]Radif, Z. S. and Ali, A. (2001). Fracture Toughness of Kenaf Mat Reinforced Polyester Composite. Pertanika Journal of Science and Technology. 99(1), 177 – 187. Retrieved from www.pertanika2.upm.edu.my.
  • [3[ Szekrényes, A. (2007). Overview on the Experimental Investigation of the Fracture Toughness in Composite Materials. Hungarian Electronic Journal of Sciences. 5 (2), 23-34. Retieved from hej.sze.hu. Corpus ID: 49320191.
  • [4] Williams, J. G. (1978). Linear Fracture Mechanics. Advances in Polymer Science, Springer Varlag, Berlin, Heidelberg, New York. 27 (1), 69 – 82.
  • [5] Mandel, J. A., Pack, S. C. and Tarazi, S. (1982). Micromechanical Studies of Crack Growth in Fibre Reinforced Materials. Engineering Fracture Mechanics, 16, 741-754.
  • [6] Parhizgar, S., Zachary, L. W. and Sun, C. T. (1982). Application of the Principle of Linear Fracture Mechanics to the Composite Materials. International Journal of Fracture Mechanics 20, 3-15. https://doi.org/10.1007/BF00942161.
  • [7]Ladeveze, P. and Le Dantec, E. (1992). Damage Modelling of the Elementary Ply for Laminated Composites. composite Science and Technology. 43, 257 – 267.
  • [8] Dhakal, H. N., Zhang, Z. Y., Richardson, M. O. W. and Errajhi, O. A. Z. (2006). The Low Velocity Impact Response of Non-woven Hemp Fibre Reinforced Unsaturated Polyester Composites. Advanced Polymer and Composites (APC) Research Group, Department of Mechanical and Design Engineering, University of Portsmouth. Retrieved from www.elsevier.com.
  • [9] Janssen, M., Zuidema, J. and Wanhill, R. J. H. (2004). Fracture Mechanics. (2nd Edition). New York: Spon Press.
  • [10] Idicula, M., Joseph, K. and Thomas, S. (2009). Mechanical Performance of Short Banana/Sisal Hybrid Fibre Polyester Composite. Journal of Reinforced Plastics and Composites. 29(1), 12 – 29. [11] Mueller, D. H. and Krobjilowski, A. (2004). Improving the Impact Strength of Natural Fibre Reinforced Composites By Specifically Designed Materials and Process Parameter. International Nonwovens Journal. 13(4), 31 – 38. Retrieved from www.inda.org

Investigation Of The Stress Intensity Factors Of A Reinforced Polymeric Composite At Different Fracture Modes

Year 2021, Volume: 5 Issue: 1, 7 - 14, 31.03.2021

Abstract

Reinforced polyester composites potentials cannot be fully harnessed and exploited unless their fracture modes and failure mechanisms under impact force are fully understood, and appropriate design tools for failure prediction are developed and validated. This study therefore, investigate the stress intensity factors of a reinforced polymeric composite (reinforced polyester composite) at different fracture modes. In this study, the polyesters were reinforced with E-glass fibre in forms of woven roving with either hard or soft mat. Fourteen (14) test samples with dimension 210mm by 150mm were developed, cut and tested in accordance with America Standard of Testing Machine (ASTM) for polymeric composites under Mode I, Mode II and Charpy impact test conditions respectively. Destructive test method was used as the process was observed and studied under a video motion camera, making it possible to monitor the damage as it progressed; crack propagation and final fracture of the specimen on a macroscopic scale level were taken. From the experiment, it could be established that the stress intensity factor is a function of the presence of a crack on the composite structure, the magnitude of the load, and the thickness of the specimens. These factors influence the rate of crack propagation in the test specimens. Specimen I was found to have the smallest stress intensity factor with a thickness of 10.3mm at maximum load of 0.91kN. This could be traced to the form and volume fraction of reinforcement. Furthermore, specimen C was observed to possess the highest optimal stress intensity factor of 9.49 MPa.m1/2 and 2.49 MPa.m1/2 at critical stress of 25.82MPa and 7.12MPa for mode-I and mode-II respectively. Therefore, specimen C had the highest tendency for crack to propagate due to excessive build-up of stress around the crack tip at every stage, as this could be traced to the composition of reinforcement.

References

  • [1] Làszló, P. K. and George, S. S. (2003). Mechanics of Composites Structures. Cambrige University Press: New York.
  • [2]Radif, Z. S. and Ali, A. (2001). Fracture Toughness of Kenaf Mat Reinforced Polyester Composite. Pertanika Journal of Science and Technology. 99(1), 177 – 187. Retrieved from www.pertanika2.upm.edu.my.
  • [3[ Szekrényes, A. (2007). Overview on the Experimental Investigation of the Fracture Toughness in Composite Materials. Hungarian Electronic Journal of Sciences. 5 (2), 23-34. Retieved from hej.sze.hu. Corpus ID: 49320191.
  • [4] Williams, J. G. (1978). Linear Fracture Mechanics. Advances in Polymer Science, Springer Varlag, Berlin, Heidelberg, New York. 27 (1), 69 – 82.
  • [5] Mandel, J. A., Pack, S. C. and Tarazi, S. (1982). Micromechanical Studies of Crack Growth in Fibre Reinforced Materials. Engineering Fracture Mechanics, 16, 741-754.
  • [6] Parhizgar, S., Zachary, L. W. and Sun, C. T. (1982). Application of the Principle of Linear Fracture Mechanics to the Composite Materials. International Journal of Fracture Mechanics 20, 3-15. https://doi.org/10.1007/BF00942161.
  • [7]Ladeveze, P. and Le Dantec, E. (1992). Damage Modelling of the Elementary Ply for Laminated Composites. composite Science and Technology. 43, 257 – 267.
  • [8] Dhakal, H. N., Zhang, Z. Y., Richardson, M. O. W. and Errajhi, O. A. Z. (2006). The Low Velocity Impact Response of Non-woven Hemp Fibre Reinforced Unsaturated Polyester Composites. Advanced Polymer and Composites (APC) Research Group, Department of Mechanical and Design Engineering, University of Portsmouth. Retrieved from www.elsevier.com.
  • [9] Janssen, M., Zuidema, J. and Wanhill, R. J. H. (2004). Fracture Mechanics. (2nd Edition). New York: Spon Press.
  • [10] Idicula, M., Joseph, K. and Thomas, S. (2009). Mechanical Performance of Short Banana/Sisal Hybrid Fibre Polyester Composite. Journal of Reinforced Plastics and Composites. 29(1), 12 – 29. [11] Mueller, D. H. and Krobjilowski, A. (2004). Improving the Impact Strength of Natural Fibre Reinforced Composites By Specifically Designed Materials and Process Parameter. International Nonwovens Journal. 13(4), 31 – 38. Retrieved from www.inda.org
There are 10 citations in total.

Details

Primary Language English
Subjects Engineering
Journal Section Articles
Authors

Dıckson Davıd Olodu 0000-0003-3383-2543

Cyril Aliyegbenoma 0000-0003-0056-7763

Publication Date March 31, 2021
Published in Issue Year 2021 Volume: 5 Issue: 1

Cite

IEEE D. D. Olodu and C. Aliyegbenoma, “Investigation Of The Stress Intensity Factors Of A Reinforced Polymeric Composite At Different Fracture Modes”, IJESA, vol. 5, no. 1, pp. 7–14, 2021.

ISSN 2548-1185
e-ISSN 2587-2176
Period: Quarterly
Founded: 2016
Publisher: Nisantasi University
e-mail:ilhcol@gmail.com