a = 2 inches + (2.5 * 10^(-5) inches/cycle * 10,000 cycles) = 4.5 inches
da/dN = 10^(-10) * (50 MPa√m)^2.5 = 2.5 * 10^(-5) inches/cycle principles of fracture mechanics rj sanford pdf pdf work
The team compared this value to the fracture toughness: a = 2 inches + (2
The team also discovered that the pipeline had been subjected to a series of pressure cycles, with pressures ranging from 500 to 900 psi. These cycles had caused fatigue cracks to form and grow in the weld region. principles of fracture mechanics rj sanford pdf pdf work
The team used the Paris-Erdogan law to model the fatigue crack growth: