Correction to: A basic hypoplastic constitutive model for sand

1 Correction to: Acta Geotechnica DOI 10.1007/s11440-017-0550-4

In the original publication of the article, the placement of the symbol sigma in the last term of Eq. (6) is incorrect. The correct equation should read as given below:

$$ {\mathring{{\varvec{\sigma}}}}= c_1({\hbox{tr}}{\varvec{\sigma}}){\dot{{\varvec{\epsilon}}}}+ c_2\frac{{\hbox{tr}}({\varvec{\sigma}}\dot{{\varvec{\epsilon}}})}{{\hbox{tr}}{\varvec{\sigma}}}{\varvec{\sigma}}+ c_3\frac{{{\varvec{\sigma}}}^2}{{\hbox{tr}}{\varvec{\sigma}}} ||\dot{{\varvec{\epsilon}}}|| + c_4 \frac{{{{\varvec{\sigma}}}^*}^2}{{{\hbox{tr}}}{\varvec{\sigma}}}||\dot{{\varvec{\epsilon}}}|| $$

(6)