Abaqus elastic material models define recoverable mechanical response before, or apart from, irreversible material behavior.
How It Works
The guide organizes elastic behavior into linear elasticity, modified elastic response, porous elasticity, and hypoelasticity. Linear elasticity can be isotropic, orthotropic, transversely isotropic, fully anisotropic, plane-stress orthotropic, warping-element specific, or traction-separation based for cohesive response.
Special elastic variants capture modeling assumptions that are not ordinary symmetric stiffness matrices. No-compression or no-tension behavior removes stiffness under selected stress states. Plane-stress orthotropic failure measures provide failure indicators for orthotropic lamina-like behavior. Porous elasticity separates volumetric and shear behavior for porous materials, while hypoelasticity defines the rate of stress change from a tangent modulus matrix and is intended for small elastic strains under monotonic loading.
Why It Matters
Elasticity is often the baseline behavior that plasticity, damage, viscoelasticity, thermal expansion, and user material models build on. Choosing the wrong elastic assumption can make later nonlinear behavior look incorrect even when the solver is functioning normally.
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