Plastic

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Plastic#

Model.uniaxialMaterial("Plastic", tag, E, Fy, Hiso, Hkin, eta=None)

Define a plastic material with linear isotropic and kinematic hardening.

Parameters:

  • tag (integer) – unique tag identifying material

  • E (float) – elastic modulus, \(E\)

  • Fy (float) – yield stress, \(F_y\)

  • Hiso (float) – isotropic hardening modulus

  • Hkin (float) – kinematic hardening modulus

  • eta (float) – optional parameter

Theory#

This model implements a 1D specialization of the J2 Plasticity material, without the nonlinear exponential hardening option.

Examples#

import xara
model = xara.Model(ndm=3)

Fy = 50
E  = 29e3
G  = 11.2e3
K  = 3
nu = 0.24

Hiso = 20e3
Hkin = 10e3

# All positional arguments
model.uniaxialMaterial("Steel", 1, E, Fy, Hiso, Hkin)

# Mix keywords and positional arguments
model.uniaxialMaterial("Steel", 2, E, Fy, Hiso=Hiso, Hkin=Hkin)

# All keyword arguments
model.uniaxialMaterial("Steel", 4, Fy=Fy, E=E, Hkin=Hkin, Hiso=Hiso)
model.uniaxialMaterial("Steel", 5, Fy=Fy, G=G, nu=nu, Hkin=Hkin, Hiso=Hiso)

# Legacy
model.uniaxialMaterial("Hardening", 9, E, Fy, Hiso, Hkin)

model.print(json=True)
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