"Enjoy Every Sandwich" (Artemis), whose title is based on a crack about the preciousness of life that Zevon made to David Letterman, is a better memento of his spiky, cynical, and sometimes tender songwriting.
In this article, a new exponent is proposed based on a crack growth boundary condition.
The extremely high cyclic frequencies characteristic of in-flight loading spectra necessitate that a damage-tolerant design approach be based on a crack-propagation threshold, ΔKTH.
The model for thermomechanical fatigue life prediction is based on a crack growth law, which assumes that the crack growth per cycle, da/dN, is correlated with the cyclic crack-tip opening displacement, ΔCTOD.
Test results were evaluated based on cracking load, crack width, ultimate load, load deflection and load–strain.
With respect to crack growth models, most are based on a single crack driving force ΔK.
The model was based on a potential crack with a diametre of 1 cm and a length of 50 m.
A regularization based on a viscous crack resistance that even enhances the robustness of the algorithm may easily be added.
PhD-Thesis, TU Darmstadt; 2004; Döring R, Hoffmeyer J, Seeger T, Vormwald M. Fatigue lifetime prediction based on a short crack growth model for multiaxial nonproportional loading.
