International E-publication: Publish Projects, Dissertation, Theses, Books, Souvenir, Conference Proceeding with ISBN.  International E-Bulletin: Information/News regarding: Academics and Research

Effect of Fiber Orientation on Mode I Crack Opening Stress Intensity of an Orthotropic Laminate

Author Affiliations

  • 1 Department of Mechanical Engineering, R.V.R and J.C College of Engineering, Guntur, AP, INDIA
  • 2 Department of Mechanical Engineering, JNTU College of Engineering, Hyderabad, AP, INDIA

Res. J. Engineering Sci., Volume 2, Issue (5), Pages 30-34, May,26 (2013)

Abstract

In this paper, the influence of fiber angle on Mode I transverse crack opening stress intensity in case of (AS4/3501-6) carbon/Epoxy laminate is studied. Ten independent fiber orientations are considered and both analytical and finite element solutions are presented using macro mechanics approach of analysis of orthotropic lamina and by using ANSYS10 finite element package. It is observed that the stress intensity at the crack tip increased gradually from zero degrees to seventy degrees and showed a decline after 70 degrees. It is observed that the variations in the load carrying capacity of matrix phase around the discontinuous fibers at the crack tip for different fiber orientations influenced the stress intensity variations. The results obtained from analytical and finite element approaches showed good congruence.

References

  1. Astrom B.T., Manufacturing of polymer composites, Chapman and Hall publications, London, (1992)
  2. Mallick P.K., Fiber reinforced composites: materials, manufacture and design, Marcel-Dekker, edition , (1993)
  3. Balaguru I., Senthil Kumar S., Sridhar K., Investigation of stealth strategies in coir fiber reinforced polymer matrix composites, Research Journal of Material Sciences,1(1), 6-10 (2013)
  4. Sankaran Apurva, Bhuvaneswari B., Maheswaran S., Santhi A.S., Nagesh R., Iyer, Application of Multi layer composites in construction and their future challenges, Research Journal of Material Sciences,1(3), 12-18, (2013)
  5. Halpin J.C. and Tsai S.W., Effects of environmental factors on composite materials, Airforce technical Report AFML-TR-67-423,Wright Aeronautical labs, Dayton, OH, (1967)
  6. Halpin J.C., Stiffness and expansion estimates for oriented short fiber composites, Journal of Composite Materials,3,732-734 (1969)
  7. Hashin Z., Analysis of composite materials-A Survey, ASME Journal of Applied Mechanics, 50, 481-505 (1983)
  8. Ishai O., Failure of unidirectional composites in tension, J. Eng. Mech. Div, proceedings of ASCE, 97, 205-221,(1971)
  9. Tsai S.W. and Wu E.M., A general theory of strength of anisotropic materials, Journal of Composite Materials,, 58-80 (1971)
  10. Sun C.T., Strength analysis of unidirectional composites and laminates, in comprehensive composite materials, A. Kelly and C.Zweben edition, chapter 1.20, Elsevier science ltd, oxford, (2000)
  11. Daniel I.M., Rowlands R.E. and Whiteside J.B., Effects of material and stacking sequence on behaviour of composite plates with holes", Journal of Experimental Mechanics, 14, 1-9 (1974)
  12. Konish H.J. and Whitney J.M., Approximate stresses in an orthotropic plate containing a circular hole, Journal of composite materials,, 157-166 (1975)
  13. Nuismer R.J. and Whitney J.M., Uniaxial failure of composite laminates containing stress concentrations, in fracture mechanics of composites, ASTM STP 953, American Society for Testing Materials, 117-142 (1975)
  14. Karlak R.F., Hole effects in a related series of symmetrical laminates, proceedings in failure modes in composites, vol IV, The Metallurgical Society of AIME, Chicago, 105-112 (1977)
  15. Daniel I.M., Failure mechanisms and fracture of composite laminates with stress concentrations, proceedings of seventh international conference on experimental stress analysis, Israel, 1-20 (1982)
  16. Awerbuch J. and Madhukar M.S., Notched strength of composite laminates; predictions and experiments-A Review, Journal of Reinforced Plastics and Composites,, 3-159 (1985)
  17. Nikbakht M. and Choupani N., Numerical Investigation of delamination in carbon epoxy composite using Arcan specimen, International Journal of Aerospace and Mechanical Engineering,, 259-266 (2008)
  18. A.B. de Moraisa, M.F. de Mourab, A.T. Marquesb, P.T. de Castrob, Mode-I interlaminar fracture of carbon/epoxy cross-ply composites, Journal of Composites science and Technology (Elsevier),62, 679-686 (2002)