Fatigue Life from Sine-on-random Excitations. (2015)

• Record Type: Journal Article
• Authors: Kihm, Frédéric; Halfpenny, Andrew; Ferguson, Neil S.
• Is Part Of: Procedia engineering. Volume 101(2015)
• Page Start: 235
• Page End: 242
• Publication Date: 2015
• Subjects: Random -- Sine-On-Random -- Fatigue -- Damage -- Rainflow Cycle Count; Engineering -- Congresses; Engineering -- Periodicals; Engineering; Conference proceedings; Periodicals; 620.005
• DOI: 10.1016/j.proeng.2015.02.033
• Languages: English
• ISSNs: 1877-7058

Abstract

Abstract: This presentation concentrates on calculating the high cycle fatigue life from sine-on-random excitations. A spectral domain approach offers advantages over the time domain approach when computation times are prohibitive. The proposed approach is to derive the statistical rainflow cycle histogram from a sine-on-random spectrum of stress data and then to use the appropriate material fatigue curve to obtain the estimated life. A case study illustrates the application of the method on a component attached to a helicopter. Comparisons with traditional time-domain approaches are presented and show excellent agreement.