Hostname: page-component-848d4c4894-8kt4b Total loading time: 0 Render date: 2024-06-24T11:14:04.775Z Has data issue: false hasContentIssue false

Notched strength estimations of graphite/epoxy composite laminates containing central holes and cracks: A statistical approach

Published online by Cambridge University Press:  03 February 2016

P. K. G. Potti
Affiliation:
Structural Analysis and Testing Group, Vikram Sarabhai Space Centre, Trivandrum, India
B. N. Rao
Affiliation:
Structural Analysis and Testing Group, Vikram Sarabhai Space Centre, Trivandrum, India
V. K. Srivastava
Affiliation:
Department of Mechanical Engineering, Institute of Technology, Banaras Hindu University, Varanasi, India

Abstract

A statistical approach is followed for prediction of tolerences of notched strength of composite laminates using the recently proposed improved inherent flaw model (IFM). In order to examine the validity of this approach, the existing fracture data on graphite/epoxy composite laminates containing central holes and cracks were used. The notched strength estimations are found to be within the range of tested values.

Type
Technical Note
Copyright
Copyright © Royal Aeronautical Society 2004 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1. Waddoups, M.E., Eisenmann, J.R. and Kaminski, B.E. Macroscopic fracture mechanics of advanced composite materials, J Composite Materials, 1971, 5, pp 446454.Google Scholar
2. Nuismer, R.J. and Whitney, J.M. Uniaxial failure of composite laminates containing stress concentrations, 1975, ASTM STP 593, pp 117142.Google Scholar
3. Whitney, J.M. and Nuismer, R.J. Stress fracture criteria for laminated composites containing stress concentrations, J Composite Materials, 1974, 8, pp 253265.Google Scholar
4. Pipes, R.B., Wetherhold, R.C. and Gillespie, J.W. Macroscopic fracture of fibrous composites, Materials Science and Engineering, 1980, 45, pp 247253.Google Scholar
5. Kim, J.K., Kim, D.S. and Takeda, N. Notched strength and fracture criterion in fabric composite plates containing a circular hole, J Composite Materials, 1995, 29, pp 982998.Google Scholar
6. Backlund, J. and Aronsson, C.G. Tensile fracture of laminates with holes, J Composite Materials, 1986, 20, pp 259286.Google Scholar
7. Aronsson, C.G. and Backlund, J. Tensile fracture of laminates with cracks, J Composite Materials, 1986, 20, pp 287307.Google Scholar
8. Eriksson, I. and Aronsson, C.G. Strength of tensile loaded graphite/epoxy laminates containing cracks, open and filled holes, J Composite Materials, 1990, 24, pp 456482.Google Scholar
9. Khatibi, A.A., Ye, L. and Mai, Y.W. An effective crack growth model for residual strength evaluation of composite laminates with circular holes, J Composite Materials, 1996, 30, pp 142163.Google Scholar
10. Khatibi, A.A., Ye, L. and Mai, Y.W. Effective crack growth and residual strength of composite laminates with a sharp notch, J Composite Materials, 1996, 30, pp 333357.Google Scholar
11. Khatibi, A.A. and Ye, L. Residual strength simulation of fibre reinforced metal laminates containing a circular hole, J Composite Materials, 1997, 31, pp 18841904.Google Scholar
12. Govindan Potti, P.K., Nageswara Rao, B. and Srivastava, V.K. Notched strength of fabric composite plates with a circular hole, Zeitschrift fur Metallkunde, 1998, 89, pp 642648.Google Scholar
13. Govindan Potti, P.K., Nageswara Rao, B. and Srivastava, V.K. Tensile fracture strength of graphite epoxy laminates containing Central holes and cracks, Adv Composite Letters, 1999, 7, pp 143147.Google Scholar
14. Govindan Potti, P.K., Nageswara Rao, B. and Srivastava, V.K. A New approach in utilising inherent flaw model for tensile fracture of composite laminates with a circular hole, Adv Composite Letters, 1999, 8, pp 119131.Google Scholar
15. Govindan Potti, P.K., Rao, B. and Srivastava, V.K. Fracture strength of tensile loaded graphite-epoxy laminates containing cracks and circular holes, Int J Plastics, Rubber and Composites, 1999, 28, pp 2629.Google Scholar
16. Govindan Potti, P.K., Nageswara Rao, B. and Srivastava, V.K. Tensile fracture strength of cracked composite laminates, Zeitschrift fur Metallkunde, 1999, 90, pp 376383.Google Scholar
17. Govindan Potti, P.K., Nageswara Rao, B. and Srivastava, V.K. Improved inherent flaw model for tensile fracture of cracked composite laminates, Adv Composite Letters, 1999, 8, pp 227230.Google Scholar
18. Govindan Potti, P.K., Nageswara Rao, B. and Srivastava, V.K. Comparison of models for the notched strength of CFRP laminates, Int J Plastics, Rubber and Composites, 1999, 28, pp 463466.Google Scholar
19. Govindan Potti, P.K., Nageswara Rao, B. and Srivastava, V.K. Notched strength evaluation of fabric laminates having a circular hole, Adv Composite Materials, 2000, 9, pp 4758.Google Scholar
20. Govindan Potti, P.K., Nageswara Rao, B. and Srivastava, V.K. Notched tensile strength evaluation of long- and short-fibre reinforced polyamide, Int J Theoretical and Applied Fracture Mechanics, 2000, 33, pp 145152.Google Scholar
21. Govindan Potti, P.K., Nageswara Rao, B. and Srivastava, V.K. Notched strength of carbon fibre/epoxy composite laminates with a circular hole, Forschung im Ingenieurwesen, 2000, 65, pp 295300.Google Scholar
22. Govindan Potti, P.K., Nageswara Rao, B. and Srivastava, V.K. Fracture strength of graphite/epoxy center-notched tensile strips, J Material Science Letters, 2000, 19, pp 911914.Google Scholar
23. Govindan Potti, P.K., Nageswara Rao, B. and Srivastava, V.K. Tensile fracture of fibre reniforced metal laminates containing a circular hole, Aeronaut J, 2000, 104, pp 4751.Google Scholar
24. Govindan Potti, P.K., Nageswara Rao, B. and Srivastava, V.K. Notched tensile strength of randomly oriented E-glass composite laminates, Materials Science and Engineering, 2000, 282, pp 5966.Google Scholar
25. Govindan Potti, P.K., Nageswara Rao, B. and Srivastava, V.K. Residual strength of composite laminates with a center crack under tension, Adv Composite Materials, 2000, 9, pp 131143.Google Scholar
26. Govindan Potti, P.K., Nageswara Rao, B. and Srivastava, V.K. Notched tensile strength of various fibre reinforced metal laminates, Adv Composite Materials, 2000, 9, pp 187206.Google Scholar
27. Govindan Potti, P.K., Nageswara Rao, B. and Srivastava, V.K. Tensile fracture of boron/aluminum composite laminates, Forschung im Ingenieurwesen, 2000, 66, pp 2430.Google Scholar
28. Govindan Potti, P.K., Nageswara Rao, B. and Srivastava, V.K. Tensile fracture of boron/aluminum laminates with holes and slits, Materials Science and Engineering, 2001, 301, pp 244252.Google Scholar
29. Mar, J.W. and Lagace, P.A. Tensile fracture of graphite/epoxy laminates with holes, 1980, Advances in Composite Materials, ICCM3 (Vol 1), pp 130145, Pergamon Press.Google Scholar
30. Morris, D.H. and Hahn, H.T. Fracture resistance characterisation of graphite/epoxy composites, 1977, ASTM STP 617, pp 517.Google Scholar
31. Bowker, A.H. and Lieberman, G.J. Engineering Statistics, 1972, Prentice-Hall, Englewood Cliffs, NJ.Google Scholar
32. Bowie, O.L. Analysis of an infinite plate containing radial cracks originating from the boundary of an internal circular hole, J Mathematics and Physics, 1956, 35, pp 6071.Google Scholar
33. Konish, H.J. Mode-I stress intensity factors for symmetrically cracked orthotropic strips, 1975, ASTM STP 593, pp 99116.Google Scholar
34. Fridrich, K., Ed. Application of fracture mechanics to composite materials, 1989, Composite Material Series, Pipes, R.B. (Ed), 6, Elsevier, Netherlands.Google Scholar
35. Harris, C.E. and Morris, D.H. On the use of crack-tip-opening displacement to predict the fracture strength of notched graphite/epoxy laminates, Experimental Mechanics, June 1985, 25, pp 193199.Google Scholar
36. Tan, S.C. Finite width correction factor for anisotropic plate containing central opening, J Composite Materials, 1988, 22, pp 10801097.Google Scholar
37. Effects of Stress Concentrations in Composites Design Hand Book for Space Applications, December 1988, ESA-PSS-03-1101.Google Scholar
38. Sih, G.C., Handbook of Stress Intensity Factors, 1973, Leigh University, Pennsylvania.Google Scholar
39. Murakami, Y. Stress Intensity Factors Hand Book, 1987, 1, pp 239240, Pergamon Press, New York.Google Scholar