Estimation of Remaining Fatigue Life for Elbow Pipe Subjected to Cyclic Overload
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Low-cycle fatigue tests for STPT410 elbow pipes were conducted under displacement control with and without an internal pressure of 9 MPa. First, preliminary fatigue tests were conducted under constant displacements of ±15, ±20 and ±30 mm. Next, two-step fatigue tests were carried out in which the elbows were first subjected to cyclic displacements of ±30 or ±20 mm, which correspond to cyclic overload, and then subjected to a second displacement of ±20 or ±15 mm until a fatigue crack penetrated. The total usage factor was 0.8∼1.2. Thus, the remaining fatigue life of a given elbow pipe can be predicted by the cumulative fatigue damage rule.
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2002 ◽
Vol 24
(6)
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pp. 699-703
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2006 ◽
Vol 326-328
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pp. 1011-1014
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2016 ◽
Vol 713
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pp. 86-89
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2012 ◽
Vol 2012
(0)
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pp. _OS0808-1_-_OS0808-3_