concreteproperties.stress_strain_profile.EurocodeNonLinear#

class EurocodeNonLinear(elastic_modulus: float, ultimate_strain: float, compressive_strength: float, compressive_strain: float, tensile_strength: float, tension_softening_stiffness: float, n_points_1: Optional[int] = 10, n_points_2: Optional[int] = 3)[source]#

Bases: ConcreteServiceProfile

Class for a non-linear stress-strain relationship to EC2.

Tension is modelled with a symmetric elastic_modulus until failure at tensile_strength, after which the tensile stress reduces according to the tension_softening_stiffness.

Parameters

elastic_modulus (float) – Concrete elastic modulus (\(E_{cm}\))
ultimate_strain (float) – Concrete strain at failure (\(\epsilon_{cu1}\))
compressive_strength (float) – Concrete compressive strength (\(f_{cm}\))
compressive_strain (float) – Strain at which the concrete stress equals the compressive strength (\(\epsilon_{c1}\))
tensile_strength (float) – Concrete tensile strength
tension_softening_stiffness (float) – Slope of the linear tension softening branch
n_points_1 (Optional[int]) – Number of points to discretise the curve prior to the peak stress
n_points_2 (Optional[int]) – Number of points to discretise the curve after the peak stress

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_strain`	Returns the largest strain.
`get_unique_strains`	Returns an ordered list of unique strains.
`plot_stress_strain`	Plots the stress-strain profile.
`print_properties`	Prints the stress-strain profile properties to the terminal.

Attributes

`n_points_1`
`n_points_2`
`strains`
`stresses`
`elastic_modulus`
`ultimate_strain`
`compressive_strength`
`compressive_strain`
`tensile_strength`
`tension_softening_stiffness`

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.

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_strain() → float#

Returns the largest 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

plot_stress_strain(title: Optional[str] = 'Stress-Strain Profile', **kwargs) → matplotlib.axes.Axes#

Plots the stress-strain profile.

Parameters

title (Optional[str]) – Plot title
kwargs – Passed to plotting_context()

Returns

Matplotlib axes object

Return type

matplotlib.axes.Axes

print_properties(fmt: Optional[str] = '8.6e')#

Prints the stress-strain profile properties to the terminal.

Parameters: fmt (Optional[str]) – Number format