L.G. Gelimson

By critical conditions, there are normal and shear stresses in typical helicopter configurations. Common strength criteria hold for the simplest cases of a material and static loading, and safety factors for uniaxial stress under simple loading. General strength theory includes critical state theory and general reserve theory based on introduced pure stresses as their own reversed uniaxial safety factors with using equidangerous cycles and Haighs diagram. Each principal stress is a certain function of the initial data in a problem. A general reserve is based on worst-case combining the values of the individual reserves for the problem input and output parameters in their ranges given by these reserves and is significantly less than safety factors optimistic and dangerous. As compared to the stress concentration factor, an introduced equivalent stress concentration factor has many advantages. At a round hole in a plate loaded by stresses far from the hole, it is between 2 and 3 or a little greater. The different radii of a rivet and a hole substantially increase the maximum contact pressure between them. All results apply to predicting fatigue strength, e.g., in aircraft building.

23rd ICAF Symposium of the international Committee on Aeronautical Fatique, 2005, Hamburg

Conference Poster

englisch

A5, 12 Seiten

DGLR-Bericht, 2005, 2005-03, 23rd ICAF Symposium of the international Committee on Aeronautical Fatique - Proceedings; S.589-600; 2005; Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V., Bonn

NA

fatigue, configurations

Bestellbar

2005