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Quantitative mechanism of fatigue crack initiation is presented; two closely located thin slices of metal slide in opposite directions under cyclic loading; increase of local plastic strain is calculated; shear strain, positive in one slice and negative in other, reaches 100% at free surface in few hundred cycles; these strains cause start of extrusion or intrusion and fatigue crack nucleation. (32631)
Quantitative mechanism of fatigue crack initiation is presented; two closely located thin slices of metal slide in opposite directions under cyclic loading; increase of local plastic strain is calculated; shear strain, positive in one slice and negative in other, reaches 100% at free surface in few hundred cycles; these strains cause start of extrusion or intrusion and fatigue crack nucleation. (32631)
Fatigue crack nucleation in metals
Proc Nat Acad Sci USA
1969
5 pages
Article (Journal)
English
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