Table 2 Hourglass energy \({\mathcal {H}}\) relative to the total elastic energy \({\mathcal {E}}\) of the specimen for Q4G1 element as a function of the element size \(h \in \{1, 2, 4, 8, 16\} \, \ell \)
\({\varvec{h}}\) | \({\varvec{16}}{\varvec{\ell }}\) | \({\varvec{8}}\varvec{\ell }\) | \({\varvec{4}} \varvec{\ell }\) | \({\varvec{2}}\varvec{\ell }\) | \({\varvec{1}}\varvec{\ell }\) |
|---|---|---|---|---|---|
\({\mathcal {H}}/{\mathcal {E}}\) | 21.8 | 1.98 | 0.304 | 0.0960 | 0.0138 |