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CappedDruckerPragerStressUpdate.h
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9 
10 #pragma once
11 
15 
56 {
57 public:
59 
61 
65  bool requiresIsotropicTensor() override { return true; }
66 
67  bool isIsotropic() override { return true; };
68 
69 protected:
72 
75 
78 
81 
83  const bool _perfect_guess;
84 
98  enum class StressReturnType
99  {
102  no_tension
104 
110  const bool _small_dilation;
111 
114 
115  virtual void yieldFunctionValues(Real p,
116  Real q,
117  const std::vector<Real> & intnl,
118  std::vector<Real> & yf) const override;
119 
120  virtual void computeAllQ(Real p,
121  Real q,
122  const std::vector<Real> & intnl,
123  std::vector<yieldAndFlow> & all_q) const override;
124 
125  virtual void preReturnMap(Real p_trial,
126  Real q_trial,
127  const RankTwoTensor & stress_trial,
128  const std::vector<Real> & intnl_old,
129  const std::vector<Real> & yf,
130  const RankFourTensor & Eijkl) override;
131 
132  virtual void initializeVars(Real p_trial,
133  Real q_trial,
134  const std::vector<Real> & intnl_old,
135  Real & p,
136  Real & q,
137  Real & gaE,
138  std::vector<Real> & intnl) const override;
139 
140  virtual void setIntnlValues(Real p_trial,
141  Real q_trial,
142  Real p,
143  Real q,
144  const std::vector<Real> & intnl_old,
145  std::vector<Real> & intnl) const override;
146 
147  virtual void setIntnlDerivatives(Real p_trial,
148  Real q_trial,
149  Real p,
150  Real q,
151  const std::vector<Real> & intnl,
152  std::vector<std::vector<Real>> & dintnl) const override;
153 
154  virtual void computePQ(const RankTwoTensor & stress, Real & p, Real & q) const override;
155 
156  virtual void initializeReturnProcess() override;
157 
158  virtual void finalizeReturnProcess(const RankTwoTensor & rotation_increment) override;
159 
160  virtual void setEppEqq(const RankFourTensor & Eijkl, Real & Epp, Real & Eqq) const override;
161 
162  virtual void setStressAfterReturn(const RankTwoTensor & stress_trial,
163  Real p_ok,
164  Real q_ok,
165  Real gaE,
166  const std::vector<Real> & intnl,
167  const yieldAndFlow & smoothed_q,
168  const RankFourTensor & Eijkl,
169  RankTwoTensor & stress) const override;
170 
171  virtual void consistentTangentOperator(const RankTwoTensor & stress_trial,
172  Real p_trial,
173  Real q_trial,
174  const RankTwoTensor & stress,
175  Real p,
176  Real q,
177  Real gaE,
178  const yieldAndFlow & smoothed_q,
179  const RankFourTensor & Eijkl,
180  bool compute_full_tangent_operator,
181  RankFourTensor & cto) const override;
182 
183  virtual RankTwoTensor dpdstress(const RankTwoTensor & stress) const override;
184 
185  virtual RankFourTensor d2pdstress2(const RankTwoTensor & stress) const override;
186 
187  virtual RankTwoTensor dqdstress(const RankTwoTensor & stress) const override;
188 
189  virtual RankFourTensor d2qdstress2(const RankTwoTensor & stress) const override;
190 };
const SolidMechanicsPlasticDruckerPrager & _dp
Hardening model for cohesion, friction and dilation angles.
const Real _small_smoother2
The cone vertex is smoothed by this amount.
virtual RankFourTensor d2qdstress2(const RankTwoTensor &stress) const override
d2(q)/d(stress)/d(stress) Derived classes must override this
virtual void initializeVars(Real p_trial, Real q_trial, const std::vector< Real > &intnl_old, Real &p, Real &q, Real &gaE, std::vector< Real > &intnl) const override
Sets (p, q, gaE, intnl) at "good guesses" of the solution to the Return-Map algorithm.
Struct designed to hold info about a single yield function and its derivatives, as well as the flow d...
TwoParameterPlasticityStressUpdate performs the return-map algorithm and associated stress updates fo...
virtual void finalizeReturnProcess(const RankTwoTensor &rotation_increment) override
Derived classes may use this to perform calculations after the return-map process has completed succe...
virtual RankTwoTensor dqdstress(const RankTwoTensor &stress) const override
d(q)/d(stress) Derived classes must override this
const bool _small_dilation
If true, and if the trial stress exceeds the tensile strength, then the user gaurantees that the retu...
virtual RankFourTensor d2pdstress2(const RankTwoTensor &stress) const override
d2(p)/d(stress)/d(stress) Derived classes must override this
CappedDruckerPragerStressUpdate(const InputParameters &parameters)
Rate-independent non-associative Drucker Prager with hardening/softening.
virtual RankTwoTensor dpdstress(const RankTwoTensor &stress) const override
d(p)/d(stress) Derived classes must override this
bool isIsotropic() override
Is the implmented model isotropic? The safe default is &#39;false&#39;.
virtual void setIntnlValues(Real p_trial, Real q_trial, Real p, Real q, const std::vector< Real > &intnl_old, std::vector< Real > &intnl) const override
Sets the internal parameters based on the trial values of p and q, their current values, and the old values of the internal parameters.
const SolidMechanicsHardeningModel & _cstrength
Hardening model for compressive strength.
virtual void yieldFunctionValues(Real p, Real q, const std::vector< Real > &intnl, std::vector< Real > &yf) const override
Computes the values of the yield functions, given p, q and intnl parameters.
bool requiresIsotropicTensor() override
Does the model require the elasticity tensor to be isotropic?
DIE A HORRIBLE DEATH HERE typedef LIBMESH_DEFAULT_SCALAR_TYPE Real
virtual void consistentTangentOperator(const RankTwoTensor &stress_trial, Real p_trial, Real q_trial, const RankTwoTensor &stress, Real p, Real q, Real gaE, const yieldAndFlow &smoothed_q, const RankFourTensor &Eijkl, bool compute_full_tangent_operator, RankFourTensor &cto) const override
Calculates the consistent tangent operator.
const SolidMechanicsHardeningModel & _tstrength
Hardening model for tensile strength.
virtual void initializeReturnProcess() override
Derived classes may use this to perform calculations before any return-map process is performed...
StressReturnType
This allows some simplification in the return-map process.
CappedDruckerPragerStressUpdate performs the return-map algorithm and associated stress updates for p...
const InputParameters & parameters() const
virtual void setIntnlDerivatives(Real p_trial, Real q_trial, Real p, Real q, const std::vector< Real > &intnl, std::vector< std::vector< Real >> &dintnl) const override
Sets the derivatives of internal parameters, based on the trial values of p and q, their current values, and the old values of the internal parameters.
enum CappedDruckerPragerStressUpdate::StressReturnType _stress_return_type
virtual void setEppEqq(const RankFourTensor &Eijkl, Real &Epp, Real &Eqq) const override
Set Epp and Eqq based on the elasticity tensor Derived classes must override this.
virtual void computePQ(const RankTwoTensor &stress, Real &p, Real &q) const override
Computes p and q, given stress.
virtual void setStressAfterReturn(const RankTwoTensor &stress_trial, Real p_ok, Real q_ok, Real gaE, const std::vector< Real > &intnl, const yieldAndFlow &smoothed_q, const RankFourTensor &Eijkl, RankTwoTensor &stress) const override
Sets stress from the admissible parameters.
const bool _perfect_guess
Initialize the NR proceedure from a guess coming from perfect plasticity.
virtual void preReturnMap(Real p_trial, Real q_trial, const RankTwoTensor &stress_trial, const std::vector< Real > &intnl_old, const std::vector< Real > &yf, const RankFourTensor &Eijkl) override
Derived classes may employ this function to record stuff or do other computations prior to the return...
virtual void computeAllQ(Real p, Real q, const std::vector< Real > &intnl, std::vector< yieldAndFlow > &all_q) const override
Completely fills all_q with correct values.