Towards efficient and robust elements for 3D-soil plasticity

✍ Scribed by R. de Borst; A.E. Groen

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 423 KB
• Volume: 70
• Category: Article
• ISSN: 0045-7949
• DOI: 10.1016/s0045-7949(98)00151-5

✦ Synopsis

The performance of several mixed formulations that can be developed for the eight-noded brick element is scrutinized for dilative or contractive plastic ¯ow which occurs in constitutive models for cohesive±frictional materials such as clay, sand and rock. Special attention is given to the phenomenon of element locking under dilative/contractive conditions and to the robustness of dierent mixed formulations for conditions of plastic ¯ow. Analytic considerations and numerical simulations of elementary tests will be presented to explain and to underline the importance of the above mentioned phenomena. A three-dimensional calculation of the bearing capacity of a square footing will be given to demonstrate the relevance and the applicability of the developed formulations.