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+---
+type: concept
+title: "Abaqus Geomaterial and Concrete Plasticity"
+complexity: advanced
+domain: computational-mechanics
+created: 2026-06-01
+updated: 2026-06-01
+address: c-000097
+aliases:
+  - Abaqus Drucker-Prager plasticity
+  - Abaqus cap plasticity
+  - Abaqus Mohr-Coulomb plasticity
+  - Abaqus clay plasticity
+  - Abaqus concrete plasticity
+tags:
+  - concept
+  - finite-element-method
+  - abaqus
+  - plasticity
+  - geomaterials
+  - concrete
+status: current
+related:
+  - "[[Abaqus-Analysis-User-s-Guide-Volume-III|Abaqus Analysis User's Guide Volume III]]"
+  - "[[Abaqus Metal Plasticity Models]]"
+  - "[[Abaqus Porous Media and Pore Fluid Materials]]"
+  - "[[Nonlinear Finite Element Analysis]]"
+  - "[[Mixed Finite Element Formulations]]"
+sources:
+  - "[[Abaqus-Analysis-User-s-Guide-Volume-III|Abaqus Analysis User's Guide Volume III]]"
+---
+
+# 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.
+
+## 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.
+
+## Sources
+
+- [[Abaqus-Analysis-User-s-Guide-Volume-III|Abaqus Analysis User's Guide Volume III]]
+