Implementation of a variational recast of the nucleation model

hugary1995 / raccoon

Massively parallel FEM code for phase-field for fracture by Dolbow Lab at Duke University

https://hugary1995.github.io/raccoon

GNU Lesser General Public License v2.1

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Implementation of a variational recast of the nucleation model #158

Closed lyyc199586 closed 4 months ago

lyyc199586 commented 7 months ago

Reason

See A variational formulation of Griffith phase-field fracture with material strength by C. J. Larsen, J. E. Dolbow, O. Lopez-Pamies. This is a variational recast of the phase-field fracture formulation put forth by Kumar, Francfort and Lopez-Pamies (2018).

Example input deck

[Materials]
  [micro_force]
    type = LDLNucleationMicroForce
    regularization_length = l
    normalization_constant = c0
    tensile_strength = sigma_ts
    hydrostatic_strength = sigma_hs
    external_driving_force_name = ce
  []
[]

lyyc199586 commented 7 months ago

updated delta formula with the correction for the mesh spacing h (just for ref): The_beta_version