vStrain

vStrain is a static storage container which stores a vector of six double values. It is used to store mechanical strains in Voigt notations, as a storage unit in Storage3D container.

The data inside of the vStrain container is manipulated using a number of dedicated methods:

Constructors

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vStrain();
Default constructor, sets vector values to zero;

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vStrain(const vStrain& vecinit);
Copy constructor, initializes the current vector with a copy of vecinit.

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vStrain(std::array<double,6> vecinit);
Constructor, initializes the current vector with a copy of vecinit.

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vStrain(std::initializer_list<double> vecinit);
Constructor, initializes the current vector using initializer list vecinit.

Access operators

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double& operator[](const size_t i);
double const& operator[](const size_t i) const;

Return (const) reference to the element i.

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double* data(void);
const double* data(void) const;
Returns (const) pointer to the first element of the vector.

Arithmetic and vector operations

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vStrain operator*(const double m) const;
Returns current vector with all components multiplied by the factor m.

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vStrain operator/(const double m) const;
Returns current vector with all components divided by the factor m.

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vStrain operator+(const vStrain& rhs) const;
Returns the sum of two vectors.

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vStrain operator-(const vStrain& rhs) const;
Returns the difference of two vectors.

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vStrain& operator*=(const double m);
Multiplies all entries of the current vector by the factor m.

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vStrain& operator/=(const double m);
Divides all entries of the current vector by the factor m.

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vStrain& operator-=(const vStrain& rhs);
Subtracts vector rhs from the current vector.

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vStrain& operator+=(const vStrain& rhs);
Adds vector rhs to the current vector.

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vStrain& operator=(const vStrain& rhs);
Assigns the content of the vector rhs to the current vector.

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double norm(double p);
Returns Frobenius norm of the strain tensor (internally considers full tensor notations).

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double double_contract(const vStrain& Bstrain) const;
Returns double contraction of two strain tensors (internally considers full tensor notations).

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double trace() const;
Returns the trace of the strain tensor (internally considers full strain tensors).

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double determinant() const;
Returns the determinant of the strain tensor (internally considers full strain tensors).

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vStrain rotated(const dMatrix3x3& RotationMatrix) const;
Returns the copy of the current strain vector rotated by RotationMatrix (internally considers full tensor notations).

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vStrain& rotate(const dMatrix3x3& RotationMatrix);
Rotates the current strain vector by RotationMatrix (internally considers full tensor notations).

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double PEEQ() const;
Returns equivalent plastic strain.

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double max_abs(void) const;
Returns maximum strain component.

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double get_tensor(const int i, const int j) const;
Returns strain tensor element using tensor indices i,j.

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dMatrix3x3 tensor(void) const;
Returns strain tensor corresponding to the current Voigt vector.

Data manipulation methods

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void set_to_zero(void);
Sets all entries to zero.

Container properties

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constexpr size_t size(void) const;
Returns the size of the stored vector.

MPI communication methods

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void pack(std::vector<double>& buffer);
The method, which packs the content of the current object into the MPI communication buffer.

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void unpack(std::vector<double>& buffer, size_t& it);
The method, which unpacks (reads) the content of the current object from the MPI communication buffer. The existing data in the container is overwritten.

Read/write methods

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std::string print(void) const;
Returns formatted string of the vector values ready to print to the terminal.

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void read_ASCII(std::istream& inp);
Reads vector content from the input stream.

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void write_ASCII(std::ostream& outp, const int precision = 16, const char sep = ' ') const;
Writes vector content in ASCII format with the specified precision using sep as entry separator into the output stream.

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std::string get_output_string(const int precision = 16, const char sep = ' ') const;
Returns output string with vector content in ASCII format with the specified precision using sep as entry separator.

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std::vector<double> get_vector() const;
Returns std::vector containing current vector components.

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std::vector<float> get_vector_float() const;
Returns std::vector<float> containing current vector components rounded to float precision.

vStrain ​

Constructors ​

Access operators ​

Arithmetic and vector operations ​

Data manipulation methods ​

Container properties ​

MPI communication methods ​

Read/write methods ​