Fatigue Failure of Hydraulic Press Cylinders
Hydraulic cylinders on three identical presses failed in a similar manner after approximately ten years' service life. The cylinder was a steel casting having a carbon content of the order of 0.3 to 0.4%. During machining of the internal surfaces, a sharp corner had been left at the junction of the head with the shell. From this stress raiser a fatigue crack had developed around the entire circumference of the cylinder to give a smooth crack of annular form. The use of a flat end to the cylinder, therefore, resulted in excessive stresses being introduced at the junction of the end with the cylinder.
Fatigue Failure of Hydraulic Press Cylinders, ASM Failure Analysis Case Histories: Processing Errors and Defects, ASM International, 2019, https://doi.org/10.31399/asm.fach.process.c9001416
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