doc:user:elements:volumes:elements_formulation
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doc:user:elements:volumes:elements_formulation [2014/10/20 17:16] – joris | doc:user:elements:volumes:elements_formulation [2018/11/27 08:42] (current) – [EAS Formulation] boman | ||
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===== Selective Reduced Integration ===== | ===== Selective Reduced Integration ===== | ||
- | The classical solution to the locking issue, experienced when using the [[#Standard formulation]], | + | The classical solution to the locking issue, experienced when using the [[#Standard formulation]], |
< | < | ||
</ | </ | ||
- | When using **Selective Reduced Integration**, | + | When using **Selective Reduced Integration**, |
The integration of internal forces is done with the formula: | The integration of internal forces is done with the formula: | ||
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===== Selective Reduced Integration with Pressure Report ===== | ===== Selective Reduced Integration with Pressure Report ===== | ||
- | Integrating the pressure using only one integration point leads to inaccuracies due to an erroneous estimation of the element volume (this can become quite significant in axisymmetric near the revolution axis or when the mesh is highly distorted). The solution consists in calculating the pressure at the element center. Then, since its value is constant over the element, it can be integrated at each integration point used to calculate | + | Integrating the pressure using only one integration point leads to inaccuracies due to an erroneous estimation of the element volume (this can become quite significant in axisymmetric near the revolution axis or when the mesh is highly distorted). The solution consists in calculating the pressure at the element center. Then, since its value is constant over the element, it can be integrated at each integration point used to compute |
===== EAS Formulation===== | ===== EAS Formulation===== | ||
- | Another method which can avoid locking issues is the EAS integration ('' | + | Another method which can avoid locking issues is the EAS integration ('' |
- integer parameters : '' | - integer parameters : '' | ||
- double parameters ('' | - double parameters ('' | ||
+ | |||
+ | <note warning> |
doc/user/elements/volumes/elements_formulation.1413818171.txt.gz · Last modified: 2016/03/30 15:22 (external edit)