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| concept | Abaqus Geomaterial and Concrete Plasticity | advanced | computational-mechanics | 2026-06-01 | 2026-06-02 | c-000097 |
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Abaqus Geomaterial and Concrete Plasticity
Definition
Abaqus geomaterial and concrete plasticity models describe pressure-dependent inelastic response, compaction, dilatancy, cracking, crushing, and stiffness degradation for soils, rocks, foams, jointed materials, and concrete-like media.
How It Works
The source separates these models from ordinary metal plasticity because hydrostatic pressure can strongly influence yielding and volume change. Extended Drucker-Prager models represent pressure-dependent materials such as granular materials and polymers. Modified Drucker-Prager/Cap models add a cap yield surface to control volumetric compaction. Mohr-Coulomb and critical-state clay models support geotechnical applications with pressure and invariant-dependent yield behavior.
Crushable foam models target energy-absorbing foams and similar crushable media. Jointed material behavior represents continua containing dense sets of joint surfaces, such as sedimentary rock. Concrete is represented by multiple models: smeared cracking in Abaqus/Standard, brittle cracking in Abaqus/Explicit, and concrete damaged plasticity in both solvers.
Finite-Elements-in-Plasticity-Theory-and-Practice provides the classical finite element plasticity context for this page's pressure-dependent models. It treats Mohr-Coulomb and Drucker-Prager criteria alongside metal-style criteria and highlights the role of non-associated flow rules for frictional materials.
Why It Matters
These materials cannot usually be modeled by metal-style pressure-insensitive plasticity. They require pressure-dependent yield surfaces, inelastic volumetric strain, tensile cracking, crushing, or damage recovery effects that are tied to element choice, confinement, and loading path.
Connections
- Mixed Finite Element Formulations are relevant when volumetric locking or pressure-like fields dominate the response.
- Abaqus Porous Media and Pore Fluid Materials extends geomaterial modeling to pore-fluid flow and saturation effects.
- Nonlinear Finite Element Analysis supplies the global iteration framework for pressure-dependent plasticity and concrete damage.
- Plasticity Yield Criteria separates pressure-dependent Mohr-Coulomb and Drucker-Prager behavior from pressure-insensitive metal plasticity.