5 FATIGUE ANALYSIS USING STRESS-LIFE (S-N) CURVES 5.1 Introduction 5.2 Application of stress concentrations 5.3 Complex load histories 98 5.4 Calculation of fatigue stress reserve factors 107 5.5 ...

Sometimes, through no fault of their owners’ use, gun parts simply fail. In many cases, “fatigue failures” are to blame. Can they be predicted? A veteran firearm engineer answers that question.

While the broken paperclip is a trivial example of metal fatigue, the phenomenon is a huge problem in the wider world. "Most unexpected failures -- bridges, airplanes, oil rigs, heart valves ...

Such analysis is helpful for identifying alloys that show exceptional or unusual behaviour and provides a different approach for identifying fatigue-resistant alloys quickly and simply, he adds. The ...

The cockpit voice recorder and flight data recorders were shipped for analysis to NTSB facilities in Washington, D.C. Two of the 22 fan blades on one of the Pratt & Whitney engines were damaged.