EurocodeParabolicUltimate¶

class concreteproperties.stress_strain_profile.EurocodeParabolicUltimate(compressive_strength: float, compressive_strain: float, ultimate_strain: float, n: float, n_points: int = 10)[source]¶

Bases: ConcreteUltimateProfile

Class for an ultimate parabolic stress-strain relationship to EC2.

Parameters:

compressive_strength (float) – Concrete compressive strength
compressive_strain (float) – Strain at which the concrete stress equals the compressive strength
ultimate_strain (float) – Concrete strain at failure
n (float) – Parabolic curve exponent
n_points (int) – Number of points to discretise the parabolic segment of the curve. Defaults to 10.

Methods

`get_compressive_strength`	Returns the most positive stress.
`get_elastic_modulus`	Returns the elastic modulus of the stress-strain profile.
`get_stress`	Returns a stress given a strain.
`get_tensile_strength`	Returns the most negative stress.
`get_ultimate_compressive_strain`	Returns the ultimate strain, or largest compressive strain.
`get_ultimate_tensile_strain`	Returns the largest tensile strain.
`get_unique_strains`	Returns an ordered list of unique strains.
`get_yield_strength`	Returns the yield strength of the stress-strain profile.
`plot_stress_strain`	Plots the stress-strain profile.
`print_properties`	Prints the stress-strain profile properties to the terminal.

Attributes

`n_points`
`strains`
`stresses`
`compressive_strength`
`compressive_strain`
`ultimate_strain`
`n`

get_compressive_strength() → float¶

Returns the most positive stress.

Returns:: Compressive strength
Return type:: float

get_elastic_modulus() → float¶

Returns the elastic modulus of the stress-strain profile.

Raises:: ValueError – Elastic modulus is zero
Returns:: Elastic modulus
Return type:: float

get_stress(strain: float) → float¶

Returns a stress given a strain.

Parameters:: strain (float) – Strain at which to return a stress.
Returns:: Stress
Return type:: float

get_tensile_strength() → float¶

Returns the most negative stress.

Returns:: Tensile strength
Return type:: float

get_ultimate_compressive_strain() → float¶

Returns the ultimate strain, or largest compressive strain.

Returns:: Ultimate strain
Return type:: float

get_ultimate_tensile_strain() → float¶

Returns the largest tensile strain.

Returns:: Ultimate strain
Return type:: float

get_unique_strains() → list[float]¶

Returns an ordered list of unique strains.

Returns:: Ordered list of unique strains
Return type:: list[float]

get_yield_strength() → float¶

Returns the yield strength of the stress-strain profile.

Raises:: NotImplementedError – If this method has not been implemented by the child class
Return type:: float

plot_stress_strain(title: str = 'Stress-Strain Profile', fmt: str = 'o-', eng: bool = False, prec: int = 2, units: UnitDisplay | None = None, **kwargs) → matplotlib.axes.Axes¶

Plots the stress-strain profile.

Parameters:

title (str) – Plot title. Defaults to "Stress-Strain Profile".
fmt (str) – Plot format string. Defaults to "o-".
eng (bool) – If set to True, formats the plot ticks with engineering notation. If set to False, uses the default matplotlib ticker formatting. Defaults to False.
prec (int) – If eng=True, sets the desired precision of the ticker formatting (i.e. one plus this value is the desired number of digits). Defaults to 2.
units (UnitDisplay | None) – Unit system to display. Defaults to None.
kwargs – Passed to plotting_context()

Returns:

Matplotlib axes object

Return type:

matplotlib.axes.Axes

print_properties(fmt: str = '8.6e') → None¶

Prints the stress-strain profile properties to the terminal.

Parameters:: fmt (str) – Number format