UniaxialMaterial Library

The opensees.uniaxial module (or uniaxialMaterial Tcl command) provide access to the library of models implementing the UniaxialMaterial interface. This interface represents a scalar-valued work-conjugate relationship (e.g., uniaxial stress-strain, force-deformation, etc.) that is generally path-dependent.

The valid queries to any uniaxial material when creating an ElementRecorder are strain, stress, and tangent. Some materials have additional queries to which they will respond. These are documented in the NOTES section for those materials.

General-Purpose Materials

Elastic / Path-Independent

Inelastic

Standard Rate-Independent Materials

These models are formulated and implemented according to well-established principles and algorithms.

Standard Rate-Dependent Materials

Metallic

  • Hysteretic
  • RambergOsgoodSteel A simple metalic model exhibiting a nonlinear hardening curve.
  • Steel01
  • Steel02 Giuffré-Menegotto-Pinto Model with Isotropic Strain Hardening
  • SteelMPF Menegotto and Pinto (1973) model Extended by Filippou et al. (1983)
  • Steel4
  • Dodd Restrepo A new model which allows the “softness” of the Bauschinger curve, as determined by the area under the curve relative to the enclosing parallelogram, to be controlled.
  • ReinforcingSteel
  • UVCuniaxial Updated Voce-Chaboche

Concrete

Bouc-Wen Models

  • BoucWenOriginal
  • DegradingPinchedBW
  • BoucWenInfill
  • BoucWen
  • BWBN Pinching Hysteretic Bouc-Wen Material

Pinch and Slip

  • SAWS Pinching material for woodframed structures.

Wrappers

Other Uniaxial Materials

PyTzQz uniaxial soil materials

for p-y, t-z and q-z elements for modeling soil-structure interaction through the piles in a structural foundation

Frameworks