Tag
fatigue
5 posts
April 22, 2026
What a broken part tells you
A short note on reading a fracture surface. Beach marks and striations, fatigue versus overload, finding the origin, and why the broken part is the one piece of evidence the analysis can't argue with.
April 12, 2026
FE-test correlation notes that don't fit on a slide
Practical lessons from correlating models with coupon, element and full-scale test. Gauges, boundary conditions, the conservatism multiplier on fatigue, and the little reference model.
February 3, 2026
Fatigue is still hard, and I've made peace with that
A short note on the parts of fatigue analysis that resist automation, mostly scatter and history and the judgement calls no pre-processor asks you about.
October 20, 2025
Where you clip the spectrum changes the life
Fatigue spectra get clipped at both ends and the clipping moves the answer. Omission, truncation, load interaction, and why the conservative direction isn't obvious.
March 27, 2025
The Kt question a junior asks me about once a month
Why the static analyst and the fatigue analyst quote different Kt for the same hole, gross versus net, and how both of them are right at the same time.