Fig. Crack trajectory for double
notched specimen, a)\(\mathbf{\varepsilon}_{\mathbf{\text{eq}}\mathbf{,}\mathbf{\text{crit}}}^{\mathbf{p}}\mathbf{=5\%}\), b)\(\mathbf{\varepsilon}_{\mathbf{\text{eq}}\mathbf{,}\mathbf{\text{crit}}}^{\mathbf{p}}\mathbf{=6\%}\), c)\(\mathbf{\varepsilon}_{\mathbf{\text{eq}}\mathbf{,}\mathbf{\text{crit}}}^{\mathbf{p}}\mathbf{=8\%}\), d)\(\mathbf{\varepsilon}_{\mathbf{\text{eq}}\mathbf{,}\mathbf{\text{crit}}}^{\mathbf{p}}\mathbf{=9\%}\), e)\(\mathbf{\varepsilon}_{\mathbf{\text{eq}}\mathbf{,}\mathbf{\text{crit}}}^{\mathbf{p}}\mathbf{=10\%}\), f)\(\mathbf{\varepsilon}_{\mathbf{\text{eq}}\mathbf{,}\mathbf{\text{crit}}}^{\mathbf{p}}\mathbf{=12\%}\), g)\(\mathbf{\varepsilon}_{\mathbf{\text{eq}}\mathbf{,}\mathbf{\text{crit}}}^{\mathbf{p}}\mathbf{=14\%}\), h)\(\mathbf{\varepsilon}_{\mathbf{\text{eq}}\mathbf{,}\mathbf{\text{crit}}}^{\mathbf{p}}\mathbf{=16\%}\)
Fig.11 shows the effect of critical plastic strain changes on the sample
failure behavior. As can be seen in this figure, as the critical strain
increases, the fracture initiation in the specimens is delayed and more
force is required for the fracture. This result is consistent with the
findings of the related literature.15