StrandPCI1992¶

class concreteproperties.stress_strain_profile.StrandPCI1992(yield_strength: float, elastic_modulus: float, fracture_strain: float, breaking_strength: float, bilinear_yield_ratio: float = 1.04, strain_cps: list[float] = <factory>, n_points: list[int] = <factory>)[source]¶

Bases: StrandProfile

Class for a PCI Strand (1992).

Class for a strand stress-strain profile by R. Devalapura and M. Tadros from the March-April issue of the PCI Journal.

Parameters:

yield_strength (float) – Strand yield strength
elastic_modulus (float) – Strand elastic modulus
fracture_strain (float) – Strand fracture strain
breaking_strength (float) – Strand breaking strength
bilinear_yield_ratio (float) – Ratio between the stress at the intersection of a bilinear profile, and the yield strength. Defaults to 1.04.
strain_cps (list[float]) – Strain control points, generates the following strain segments: [0, strain_cps[0], strain_cps[1], fracture_strain]. Length must be equal to 2. Defaults to [0.005, 0.015].
n_points (list[int]) – Number of points to discretise within each strain segment. Length must be equal to 3. Defaults to [5, 14, 5].

Methods

`get_compressive_strength`	Returns the most positive stress.
`get_elastic_modulus`	Returns the elastic modulus of the stress-strain profile.
`get_strain`	Returns a strain given a stress.
`get_stress`	Returns a stress given a strain.
`get_tensile_strength`	Returns the most negative stress.
`get_ultimate_compressive_strain`	Returns the 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

`bilinear_yield_ratio`
`strains`
`stresses`
`yield_strength`
`elastic_modulus`
`fracture_strain`
`breaking_strength`
`strain_cps`
`n_points`

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_strain(stress: float) → float¶

Returns a strain given a stress.

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

Returns:: Yield strength
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