A team of engineers was called in to investigate the failure. They began by collecting data on the pipeline's material properties, operating conditions, and inspection history. They also conducted a thorough visual examination of the failed component.
The team also used the fracture toughness (KIC) to determine the critical stress intensity factor for the material. The fracture toughness is a measure of a material's resistance to fracture, and is defined as: principles of fracture mechanics rj sanford pdf pdf work
The investigation revealed that the pipeline had been fabricated using a welding process, and that the weld had not been properly heat-treated. As a result, the weld region had a higher yield strength and a lower toughness than the base metal. A team of engineers was called in to investigate the failure
where ac is the critical crack length.
K = (900 psi * √(π * 2 inches)) * 1.5 = 85 MPa√m The team also used the fracture toughness (KIC)
The team decided to apply the principles of fracture mechanics to analyze the failure. They used the stress intensity factor (K) to characterize the stress field around the crack tip.