Fatigue assessment of welds based on elastic analysis
according to 2015 ASME Section VIII Division 2 Part 5
Input data
Time point 1
Time point 2
Elastic membrane stress
σ
e
m
MPa
Elastic bending stress
σ
e
b
MPa
Temperature
T
°C
Weld thickness
t
mm
Yield strength
S
y
MPa
Modulus of elasticity
E
y
MPa
Poisson's ratio
ν
Cyclic stress-strain curve
Carbon steel
1Cr-½Mo
1Cr-1Mo-¼V
2¼Cr-½Mo
9Cr-1Mo
Type 304 steel
Alloy 800H
Prediction interval
lower 99% (-3σ)
upper 99% (+3σ)
lower 95% (-2σ)
upper 95% (+2σ)
lower 68% (-1σ)
upper 68% (+1σ)
mean curve
Modification factor
f
E
Calculate
Calculation
Elastic stress range
Δσ
e
MPa
Nonlinear stress range
Δσ
MPa
Stress range parameter
ΔS
ess
MPa·mm
10/45
Results
Permissible number of cycles
N
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