PSI - Issue 28

Nikita Kazarinov et al. / Procedia Structural Integrity 28 (2020) 2168–2173 N. Kazarinov et al/ Structural Integrity Procedia 00 (2020) 000–000

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amplitudes and durations, which can be analytically obtained using the solution of the equation of motion. This way, a known effect from dynamic fracture of solids can be reproduced using a very simple system. For the case of a rising load, it can be shown that relatively high loading rates result in higher strength of the system and thus, dynamic branch of the strength curve can be obtained for the linear oscillator system. Moreover, the model can be calibrated to model some known experimental results on dependence of strength on the loading rate: experiments on crack initiation due to pulse loading by Ravi-Chandar and Knauss (1984) were considered and experimental dependence of the starting stress intensity factor on the fracture time was obtained using the oscillator model. Acknowledgements

The work was supported by RFBR (grants 19-31-60037, 20-01-00291). References

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