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Book ChapterDOI

The Significance of Fatigue Crack Closure

W Elber1
01 Jan 1971-Vol. 486, Iss: 486, pp 230-242
TL;DR: Al alloy sheet fatigue crack closure under cyclic tensile loading, deriving expression for crack propagation rate in terms of effective stress amplitude as discussed by the authors, was derived for the first time in the literature.
Abstract: Al alloy sheet fatigue crack closure under cyclic tensile loading, deriving expression for crack propagation rate in terms of effective stress amplitude
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Journal ArticleDOI
TL;DR: A comprehensive review of cumulative fatigue damage theories for metals and their alloys, emphasizing the approaches developed between the early 1970s to the early 1990s, can be found in this paper, where the authors grouped these theories into six categories: linear damage rules, nonlinear damage curve and two-stage linearization approaches; life curve modification methods; approaches based on crack growth concepts; continuum damage mechanics models; and energy-based theories.

1,123 citations

Journal ArticleDOI
TL;DR: In this paper, a general crack opening stress equation is presented which may be used to correlate crack growth rate data for various materials and thicknesses, under constant amplitude loading, once the proper constraint factor has been determined.
Abstract: A general crack opening stress equation is presented which may be used to correlate crack growth rate data for various materials and thicknesses, under constant amplitude loading, once the proper constraint factor has been determined. The constraint factor, alpha, is a constraint on tensile yielding; the material yields when the stress is equal to the product of alpha and sigma. Delta-K (LEFM) is plotted against rate for 2024-T3 aluminum alloy specimens 2.3 mm thick at various stress ratios. Delta-K sub eff was plotted against rate for the same data with alpha = 1.8; the rates correlate well within a factor of two.

761 citations

Journal ArticleDOI
TL;DR: In this article, the authors report the advances in the state of the art considering the relationships between the properties of functional surfaces, their applications and the technologies to engineer surfaces, and their applications in many advanced fields, such as: electronics, information technology, energy, optics, tribology, biology and biomimetics.

593 citations

Journal ArticleDOI
TL;DR: In this paper, the authors used an irreversible constitutive equation for the cyclic interface traction-separation behavior within the cohesive zone model (CZM) approach to study fatigue crack growth (FCG) along an interface.

470 citations