Summary
The study concerns computer simulation of dynamic piling-up behaviour of dislocations emitted from the source against the grain boundary. As the number of dislocations emitted increases, the stress singularity near the pile-up becomes to reveal \(1/\sqrt {\rm{r}}\) characteristics, where r=the distance from the pile-up outward. The dynamic stress intensity facter by the dislocation piling-up was obtained in analytical equation in terms of stress application rate, grain size and materials constants. The comparison of the results was made with the static (equilibrium) result. Finally, the result was applied to the dynamic yielding strength of steel, and it is in good agreement with the experimental data in literatures.
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© 1987 Springer-Verlag, Berlin, Heidelberg
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Yokobori, A.T., Yokobori, T., Nishi, H. (1987). Stress Rate and Grain Size Dependence of Dynamic Stress Intensity Factor by Dynamical Piling-up of Dislocations Emitted. In: Kawata, K., Shioiri, J. (eds) Macro- and Micro-Mechanics of High Velocity Deformation and Fracture. International Union of Theoretical and Applied Mechanics. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-82767-9_12
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DOI: https://doi.org/10.1007/978-3-642-82767-9_12
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-82769-3
Online ISBN: 978-3-642-82767-9
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