Mode II interlaminar fracture

The pure mode II interlaminar fracture testing can be performed using both the end notched flexure (ENF) specimen (Russell and Street, 1984, 1985) and the end loaded split (ELS) specimen (Corleto and Bradley, 1987 Prel et al.. 1989) (Fig 3.32). 

Fig. 3.32. Schematic illustrations of mode II interlaminar fracture test specimens (a) ENF speeimen ...

The increase in mode II interlaminar fracture toughness is even more significant than the mode 1 interlaminar fracture toughness. The similarity in the changes of magnitude of the mode II fracture toughness and the ILSS with regard to the level of... 

Summary of Mode I and Mode II interlaminar fracture toughness values for unidirectional carbon fiber 828 mPDA epoxy matrix composites with different fiber surface treatments ... 

Vf, fiber volume fraction neat resin fracture toughness mode 1 interlaminar fracture toughness of composite G),., mode II interlaminar fracture toughness of composite. 

Fig. 8.10. Correlation of residual compression-after-impact (CAI) strength with composite mode II interlaminar fracture toughness, Gji. After Masters (1987a).

Davies, P., G.D. Sims, B.R.K. Blackman, A.J. Brunner, K. Kageyama, M. Hojo, K. Tanaka, G.B. Murri, C.Q. Rousseau, B. Gieseke, and R. Martin, Comparison of test configurations for determination of mode II interlaminar fracture toughness results from international collaborative test programme. Plastics, Rubber and Composites, 1999. 28(9) p. 432-437. 

Fig. 10. Effects of fiber type (T300 and Altex) and test environment (RT-air and 77K-LN on the relation between mode II interlaminar fracture toughness and increment of crack length in fiber/ poxyH laminates.

Finally, the basic Adhesive B formulation was toughened using the MEAc core-shell polymer and used as the matrix for an epoxy-graphite fiber composite. The mode II interlaminar fracture toughness, GIIc, was increased from 500 J/m2 to 890 J/m2 by the presence of the acrylic core-shell toughener. 

Kusaka T, Hojo M, Ochiai S, Kurokawa T. Rate-dependent mode II interlaminar fracture behavior of carbon fiber/epoxy composite laminates. Mater Sci Res Int 1999 5 98-103. 

Arai A, Noro Y, Sugimoto K-I and Endo M (2008) Mode I and mode II interlaminar fracture toughness of CFRP laminates toughened by carbon nanofiber interlayer, Compos Sci Technol 68 516-525. 

Beckermann GW, Pickering KL (2015) Mode I and Mode II interlaminar fracture toughness of comjtosite laminates interleaved with electiospun nanofibre veils. Compos A Appl Sci Manuf 72 11-21. doi 10.1016/j.compositesa.2015.01.028... 

O Brien, T.K., Johnston, W.M., Toland, G.J., 2010. Mode II Interlaminar Fracture Toughness and Fatigue Characterization of Graphite Epoxy Composite Material. Report Prepared for NASA, NASA/TM-2010—216838, Hampton, Virginia. 

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