Error estimation in hexahedral element

Abstract:

This paper uses the discretization estimator error Z2, proposed Zienckiewz and Zhu, for implementing the refinement by subdivision in hexahedrons elements. Obtaining improved tension field is based on techniques of smoothing tensions by zones, developing three procedures for evaluating the error. The procedures developed in this work were applied to two problems with known solution, in order to evaluate and define the characteristics of each proposed technique. In was observed that in the problem with smooth solution the technique that considers the presence of fictitious nodes and reduced integration could be used. However, in the problem with singularities it is better to consider the nodes with full integration for error estimation.

Año de publicación:

2010

Keywords:

• H-adaptive
• Error estimator
• Discretization error
• Effectivity index
• Smoothed stress

Fuente:

scopus