Abstract
End notched flexure (ENF) test specimens of unidirectional IMA/M21 carbon fiber composite (CFC) were fabricated using standard autoclave process. A Teflon insert was used to simulate a delamination at the midplane. Three-point bend setup tests were conducted at an average frequency of 2 Hz using a 25 kN servo-hydraulic test machine in room temperature conditions. Constant amplitude fatigue tests were done at three different stress ratios, viz. R = 0.0, 0.5, and −1.0 to construct the standard G-N onset diagram, similar to S–N curve in its usefulness. N onset was identified as 5% change in initial compliance value. Using an equivalent energy release rate parameter, G eq, all the curves were collapsed into a single curve in the form of Basquin’s equation. The equation was subsequently used in predicting the delamination onset-of-growth life under a standard mini-FALSTAFF spectrum load sequence. A fairly good correlation was found between the predicted and experimental mode II onset-of-growth behavior.
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Abbreviations
- R :
-
Stress ratio
- N onset :
-
Number of constant amplitude (CA) fatigue cycles for onset-of-growth
- G max :
-
Maximum strain energy release rate (SERR)
- G min :
-
Minimum SERR
- G eq :
-
Equivalent SERR
- G IIC :
-
Critical mode II SERR
- \(G_{\text{eq}}^{\prime }\) :
-
Basquin's coeffecient
- ΔG :
-
Range SERR
- γ :
-
Best fit parameter
- N b :
-
Number of spectrum fatigue load blocks
- D :
-
Damage fraction
References
Hexcel ready to fly on the A350 XWB, Reinf. Plast. 57, 25–26 (2013)
A.C. Garg, Delamination—a damage mode in composite structures. Eng. Frac. Mech. 29, 557–584 (1988)
R.P. Wei, Fracture Mechanics: Integration of Mechanics, Materials Science, and Chemistry (Cambridge University Press, 2010)
FAA, Composite Aircraft Structure: Advisory Circular (AC) 20-107B, Change 1, FAA (2010)
N.L. Post, S.W. Case, J.J. Lesko, Modeling the variable amplitude fatigue of composite materials: a review and evaluation of the state of the art for spectrum loading. Inter. J. Fatigue 30, 2064–2086 (2008)
N. Jagannathan, A.R. Anilchandra, C.M. Manjunatha, Onset-of-growth behavior of mode II delamination in a carbon fiber composite under spectrum fatigue load. Compos. Struct. 132, 477–483 (2015)
M. Wisnom, M. Jones, Through thickness fatigue failure of fibre-reinforced composites. Aeronaut. J. 102, 83–88 (1998)
J. Petermann, A. Plumtree, A unified fatigue failure criterion for unidirectional laminates. Compos. Part A: Appl. Sci. Manuf. 32, 107–118 (2001)
M. Hojo, K. Tanaka, C.G. Gustafson, R. Hayashi, Effect of stress ratio on near-threshold propagation of delamination fatigue cracks in unidirectional CFRP. Compos. Sci. Technol. 29, 273–292 (1987)
I. Maillet, L. Michel, F. Souric, Y. Gourinat, Mode II fatigue delamination growth characterization of a carbon/epoxy laminate at high frequency under vibration loading. Eng. Frac. Mech. 149, 298–312 (2015)
http://www.hexcel.com/Resources/DataSheets/Prepreg-Data-Sheets/M21_global.pdf
A.R. Anilchandra, R. Bojja, N. Jagannathan, C.M. Manjunatha, Variable amplitude fatigue testing to characterize mode II delamination in a polymer composite. Trans. Indian Inst. Met. 69, 421–424 (2016)
P. Heuler, H. Klätschke, Generation and use of standardised load spectra and load–time histories. Int. J. Fatigue 27, 974–990 (2005)
W.X. Wang, M. Nakata, Y. Takao, T. Matsubara, Experimental investigation of test methods for mode II interlaminar fracture testing of carbon fiber reinforced composites. Compos. Part A Appl. Sci. Manuf. 40, 1447–1455 (2009)
ASTM D6115, Standard test method for mode I fatigue delamination growth onset of unidirectional fiber-reinforced polymer matrix composites, vol. 15.03. Annual Book of ASTM Standards, ASTM International, West Conshohocken, PA, 2003
A.J. Vinciquerra, B.D. Davidson, J.R. Schaff, A.L. Smith, Determination of the mode II fatigue delamination toughness of laminated composites. J. Reinf. Plast. Compos. 21, 663–677 (2002)
ASTM E1049, Standard practices for cycle counting in fatigue analysis. Annual Book of ASTM Standards, ASTM International, West Conshohocken, PA, 2003
I. Maillet, L. Michel, F. Souric, Y. Gourinat, Mode II fatigue delamination growth characterization of a carbon/epoxy laminate at high frequency under vibration loading. Eng. Fract. Mech. 149, 298–312 (2015)
C.M. Manjunatha, R. Bojja, N. Jagannathan, Enhanced fatigue performance of a polymer nanocomposite under spectrum loads. Mater. Perform. Charact. 3, 327–341 (2014)
C.M. Manjunatha, R. Bojja, N. Jagannathan, A.J. Kinloch, A.C. Taylor, Enhanced fatigue behavior of a glass fiber reinforced hybrid particles modified epoxy nanocomposite under WISPERX spectrum load sequence. Int. J. Fatigue 54, 25–31 (2013)
B.L.V. Bak, C. Sarrado, A. Turon, J. Costa, Delamination under fatigue loads in composite laminates: A review on the observed phenomenology and computational methods. Appl. Mech. Rev. 66, 1–24 (2014)
A. Argüelles, J. Viña, A.F. Canteli, M.A. Castrillo, J. Bonhomme, Interlaminar crack initiation and growth rate in a carbon-fibre epoxy composite under mode-I fatigue loading. Compos. Sci. Technol. 68, 2325–2331 (2008)
T.K. O’Brien, W.M. Johnston, G.J. Toland, Mode II interlaminar fracture toughness and fatigue characterization of a graphite Epoxy Compos Mater, NASA/TM–2010-216838
Acknowledgements
Authors wish to thank the AR&DB for financially supporting the project. The support and encouragement provided by Mr. Shyam Chetty, Director, Dr. Satish Chandra, Head, STTD, Dr. Ramesh Sundaram, ACD, CSIR-NAL are acknowledged. Thanks are also due to scientists and technical support staff members of FSIG-STTD and ACD, CSIR-NAL for their assistance in experimental work.
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Anilchandra, A.R., Seshagirachari, M., Bojja, R., Jagannathan, N., Manjunatha, C.M. (2018). Prediction of Mode II Delamination Onset Life Under Spectrum Fatigue Loads Using Equivalent Strain Energy Release Rate Concept. In: Prakash, R., Jayaram, V., Saxena, A. (eds) Advances in Structural Integrity. Springer, Singapore. https://doi.org/10.1007/978-981-10-7197-3_17
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