concreteproperties.stress_strain_profile.StrandProfile

class StrandProfile(strains, stresses, yield_strength)

Bases: StressStrainProfile

Abstract class for a steel strand stress-strain profile.

Implements a piecewise linear stress-strain profile. Positive stresses & strains are compression.

Parameters

• strains (List[float]) – List of strains (must be increasing or equal)

• stresses (List[float]) – List of stresses

• yield_strength (float) – Strand yield strength

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

strains
stresses
yield_strength

get_strain(stress)

Returns a strain given a stress.

Parameters

stress (float) – Stress at which to return a strain.

Returns

float – Strain

get_yield_strength()

Returns the yield strength of the stress-strain profile.

Returns

float – Yield strength

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

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_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

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