Correction to: A New Rock Brittleness Index Based on the Peak Elastic Strain Energy Consumption Ratio

1 Correction to: Rock Mechanics and Rock Engineering https://doi.org/10.1007/s00603-021-02738-y

In the original publication, the author has missed to update a few errors and they are corrected as follows:

1. Correction to text

• 1. In the line 4 of “Abstract”, “failure energy” should be “post-peak failure strain energy”.

• 2. In the “List of Symbols”, the descriptions of several symbols are incorrect, the correct ones are as follows:

  $U_{{\text{p}}}^{{\text{e}}}$:

  Peak elastic strain energy

  $U^{{\text{f}}}$:

  Post-peak failure strain energy

  $U_{{\text{r}}}^{{\text{e}}}$:

  Residual elastic strain energy

  $U^{{\text{a}}}$:

  Additional input strain energy

  $U^{{{\text{ec}}}}$:

  Consumed elastic strain energy during the failure process

  $U_{{\text{p}}}^{{\text{d}}}$:

  Peak dissipated strain energy

• 3. In the line 8 of the first paragraph of Sect. 2, the “input energy” should be “input strain energy”; in the line 13, the “dissipated energy” should be “dissipated strain energy”.

• 4. In the line 8 of the second paragraph of Sect. 2, the “failure energy” should be “post-peak failure strain energy”; in the line 10, the “failure energy” should be “post-peak failure strain energy”; in line 14, the “input energy” should be “input strain energy”.

• 5. In the line 5 of the third paragraph of Sect. 2, the “peak elastic strain density” should be “peak elastic strain energy”; the “failure energy density” should be “post-peak failure strain energy”; in line 6, the “residual elastic strain energy density” should be “residual elastic strain energy”; in line 14, the “input energy” should be “input strain energy”.

• 6. In the line 33 of the third paragraph of Sect. 3.1, the “pre-peak elastic strain energy” should be “peak elastic strain energy”.

• 7. In the line 4 of the first paragraph of Sect. 3.2, the “energy density” should be “strain energy”.

• 8. In the line 17 of Sect. 3.3, the “input energy” should be “input strain energy”.

2. Correction to Tables

• 1. In the line 1 of column “Energy parameters” of Table 1, the “additional input energy” should be “additional input strain energy”; the “total failure energy” should be “post-peak failure strain energy”.

• 2. In the line 5 of column “Energy parameters” of Table 1, the “peak dissipated energy” should be “peak dissipated strain energy”.

• 3. In the lines 6 and 7 of column “Characteristics” of Table 1, the “additional input energy” should be “additional input strain energy”.

• 4. In the lines 13, 14 and 16 of column “Characteristics” of Table 1, the “dissipated energy” should be “dissipated strain energy”.

• 5. In the lines 22 and 24 of column “Characteristics” of Table 1, the “fracture energy” should be “post-peak failure strain energy”.

• 6. In the line 27 of column “Characteristics” of Table 1, the “additional input energy” should be “additional input strain energy”.

• 7. In the lines 34 and 35 of column “Characteristics” of Table 1, the “failure energy” should be “post-peak failure strain energy”.

• 8. In the line 38 of column “Characteristics” of Table 1, the “input energy” should be “input strain energy”.

3. Correction to Figures

• 1. Figure 1b of the original article is incorrect. The corrected version is shown below.