Modeling of pressure-sensitive materials using a cap plasticity theory in extended finite element method
| Autor: | A. R. Azami, Amir R. Khoei, Amir Shamloo |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
Engineering
Computer simulation business.industry Stress space Metals and Alloys Structural engineering Plasticity Industrial and Manufacturing Engineering Computer Science Applications law.invention Partition of unity law Modeling and Simulation Ceramics and Composites Hardening (metallurgy) Metal powder Hydrostatic equilibrium business Extended finite element method |
| Zdroj: | Journal of Materials Processing Technology. :1248-1257 |
| ISSN: | 0924-0136 |
| DOI: | 10.1016/j.jmatprotec.2005.02.161 |
| Popis: | In this paper, a new computational technique based on the extended finite element method (X-FEM) is presented in elasto-plastic behavior of pressure-sensitive material. The cap plasticity model is employed within the X-FEM framework in numerical simulation of powder die pressing. The double-surface plasticity model includes a failure surface and an elliptical yield cap, which closes the open space between the failure surface and hydrostatic axis. The yield cap expands in the stress space according to a specified hardening rule. Application of the X-FEM in simulation of two phase plasticity continuums is presented in an incremental manner and the role of sub-elements in the partition of unity method is demonstrated. Finally, three numerical examples, including: a plate with hole subjected to compression, a double-layer foundation and the compaction simulation of metal powder are analyzed numerically. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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