concreteproperties.stress_strain_profile.StrandPCI1992#

class StrandPCI1992(yield_strength, elastic_modulus, fracture_strain, breaking_strength, bilinear_yield_ratio=1.04, strain_cps=<factory>, n_points=<factory>)[source]#

Bases: StrandProfile

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, default: 1.04) – Ratio between the stress at the intersection of a bilinear profile, and the yield strength
strain_cps (List[float], default: <factory>) – Strain control points, generates the following strain segments: [0, strain_cps[0], strain_cps[1], fracture_strain]. Length must be equal to 2.
n_points (List[int], default: <factory>) – Number of points to discretise within each strain segment. Length must be equal to 3.

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()#

Returns the most positive stress.

Returns: float – Compressive strength

get_elastic_modulus()#

Returns the elastic modulus of the stress-strain profile.

Returns: float – Elastic modulus

get_strain(stress)#

Returns a strain given a stress.

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

get_stress(strain)#

Returns a stress given a strain.

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

get_tensile_strength()#

Returns the most negative stress.

Returns: float – Tensile strength

get_ultimate_compressive_strain()#

Returns the largest compressive strain.

Returns: float – Ultimate strain

get_ultimate_tensile_strain()#

Returns the largest tensile strain.

Returns: float – Ultimate strain

get_unique_strains()#

Returns an ordered list of unique strains.

Returns: List[float] – Ordered list of unique strains

get_yield_strength()#

Returns the yield strength of the stress-strain profile.

Returns: float – Yield strength

plot_stress_strain(title='Stress-Strain Profile', fmt='o-', **kwargs)#

Plots the stress-strain profile.

Parameters

title (str, default: 'Stress-Strain Profile') – Plot title
fmt (str, default: 'o-') – Plot format string
kwargs – Passed to plotting_context()

Returns

Axes – Matplotlib axes object

print_properties(fmt='8.6e')#

Prints the stress-strain profile properties to the terminal.

Parameters: fmt (str, default: '8.6e') – Number format
Return type: None