Use of Microfractography in the Study of Fatigue Crack Propagation Under Spectrum Loading

Download or read book Use of Microfractography in the Study of Fatigue Crack Propagation Under Spectrum Loading written by PR. Abelkis and published by . This book was released on 1978 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: Use of electron microscope fractography in the study of fatigue crack propagation under spectrum loadings is based on the evaluation of 7075-T651 aluminum alloy specimens from an experimental program. Microscopically established crack propagation data by striation spacing measurements are shown to provide cycle-to-cycle evidence of crack propagation behavior under spectrum loading that normally cannot be established under macroscopic observation. Crack propagation rate retardation and acceleration is illustrated through fractographic striation measurements. Contribution and interaction of various loads of a transport wing loads spectrum are illustrated fractographically from the test program.