PSI - Issue 33

Sergey Uvarov et al. / Procedia Structural Integrity 33 (2021) 465–468 Author name / Structural Integrity Procedia 00 (2019) 000 – 000

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Fig. 5. Strain field of the failing specimen

1.3. Results and discussion Interlaminar shear strength appears to be dependent on the compression stress. It changes from 90 to 150MPa with the compression load increase from 126 to 800MPa. This is comparable with strain rate sensitivity of this parameter (Fig 6).

100 120 140 160

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1000s^-1

400s^-1

static

Shear strength, MPa

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Loading angle, degrees

Fig. 6. Shear strength of the CFRP at different strain rates and layer orientations (right)

We found that in some cases the friction is not enough and some improvement and future investigation needed. We have plan to investigate two cases: low friction when thin layer of the Teflon will be placed between contact surfaces and the small ledge on the clamps or rods in order to prevent specimen movement in the transversal direction. Acknowledgements The research was supported by a grant Russian Science Foundation (project No. 21-79-30041). References Shi, Y., Swait, T., Soutis, C., 2012. Modelling damage evolution in composite laminates subjected to low velocity impact. Composite Structures 94, 2902 – 2913. https://doi.org/10/gft3rx Davydova, M., Uvarov, S., 2013. Fractal statistics of brittle fragmentation. Fracture and Structural Integrity 24, 60-68.