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cs_fatigue_variables

residual_sig_hoop = None module-attribute

residual hoop stress in strucutal material (Pa)

n_cycle = None module-attribute

Allowable number of cycles for CS stress model

n_cycle_min = None module-attribute

Minimum allowable number of cycles for CS stress model

t_crack_radial = None module-attribute

Initial depth of crack in thickness of conduit (m)

t_crack_vertical = None module-attribute

Inital vertical crack size (m)

dr_cs_turn_conduit = None module-attribute

Thickness of CS conductor conduit (m)

dz_cs_turn_conduit = None module-attribute

Vertical thickness of CS conductor conduit (m)

bkt_life_csf = None module-attribute

Switch to pass bkt_life cycles to n_cycle_min

sf_vertical_crack = None module-attribute

Safety factor for vertical crack size (-)

sf_radial_crack = None module-attribute

Safety factor for radial crack size (-)

sf_fast_fracture = None module-attribute

safety factor for stress intensity factor (-)

paris_coefficient = None module-attribute

Paris equation material coefficient (-)

paris_power_law = None module-attribute

Paris equation material power law (-)

walker_coefficient = None module-attribute

walker coefficent (-)

fracture_toughness = None module-attribute

fracture toughness (MPa m^½)

init_cs_fatigue_variables()

Source code in process/data_structure/cs_fatigue_variables.py 
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def init_cs_fatigue_variables():
    global residual_sig_hoop
    residual_sig_hoop = 2.4e8

    global t_crack_radial
    t_crack_radial = 6.0e-3

    global t_crack_vertical
    t_crack_vertical = 0.89e-3

    global n_cycle
    n_cycle = 0.0

    global n_cycle_min
    n_cycle_min = 2.0e4

    global dz_cs_turn_conduit
    dz_cs_turn_conduit = 0.022

    global dr_cs_turn_conduit
    dr_cs_turn_conduit = 0.07

    global bkt_life_csf
    bkt_life_csf = 0.0

    global sf_vertical_crack
    sf_vertical_crack = 2.0

    global sf_radial_crack
    sf_radial_crack = 2.0

    global sf_fast_fracture
    sf_fast_fracture = 1.5

    global paris_coefficient
    paris_coefficient = 65.0e-14

    global paris_power_law
    paris_power_law = 3.5

    global walker_coefficient
    walker_coefficient = 0.436

    global fracture_toughness
    fracture_toughness = 2.0e2