Abstract
We calculate the effect of the nonsingular stress acting parallel to a crack (the “T-stress”) on edge dislocation nucleation at a crack loaded in Mode I. We find that this leads to crack size effect - that is, for small cracks (of order 100 atomic spacings or less), the T stress causes the critical load for dislocation nucleation (expressed in terms of the applied stress intensity factor) to deviate from the classical T = 0 result. Specific results are discussed for the case of a finite crack subject to remote tension, where it is shown that the threshold for dislocation nucleation is reduced.
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© 2000 Kluwer Academic Publishers
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Beltz, G.E., Fischer, L.L. (2000). Effect of T-stress on Edge Dislocation Formation at A Crack Tip Under Mode I Loading. In: Chuang, T.J., Rudnicki, J.W. (eds) Multiscale Deformation and Fracture in Materials and Structures. Solid Mechanics and Its Applications, vol 84. Springer, Dordrecht. https://doi.org/10.1007/0-306-46952-9_14
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DOI: https://doi.org/10.1007/0-306-46952-9_14
Publisher Name: Springer, Dordrecht
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