Computational Geomechanics and Hydraulic Structures by Sheng-Hong Chen

Author:Sheng-Hong Chen
Language: eng
Format: epub, pdf
Publisher: Springer Singapore, Singapore

The different phases of rock excavation and concrete placement demand different meshes;

Spatial-time characteristics attributable to the crack propagation (Wang 1987; Tradegard et al. 1998) or/and localization (Leroy and Ortiz 1990; Needleman 1992; Chen et al. 2007) need mesh adjustment and data transfer.

5.2.2 Error and Element Size Estimators

Towards the adaptive FEM computation of h-version refinement, the posteriori error and element size estimator is most essential.

Normally, the exact solution demanded in approximation error estimation is not accessible. In the ZZ-estimator, stress gradient error is approximated by the difference between the recovered solution of higher order and the original FE solution on the mesh with element size .

Take the linear elastic problem for example, the governing equation of Eq. (4.​71) may be reduced in terms of total displacement

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