Index of NACA Technical Publications


Book Description




Aero Digest


Book Description




Handbook of Structural Life Assessment


Book Description

This important, self-contained reference deals with structural life assessment (SLA) and structural health monitoring (SHM) in a combined form. SLA periodically evaluates the state and condition of a structural system and provides recommendations for possible maintenance actions or the end of structural service life. It is a diversified field and relies on the theories of fracture mechanics, fatigue damage process, and reliability theory. For common structures, their life assessment is not only governed by the theory of fracture mechanics and fatigue damage process, but by other factors such as corrosion, grounding, and sudden collision. On the other hand, SHM deals with the detection, prediction, and location of crack development online. Both SLA and SHM are combined in a unified and coherent treatment.




Railway Age


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Diagonal Tension in Curved Webs


Book Description

The engineering theory of incomplete diagonal tension in plane webs presented in NACA TN No. 1364 is generalizd in order to make it applicable to curved webs. Comparisons are given between calculated and experimental results for a number of stiffened cylinders subjected to torsional loads. The results indicate that the theory predicts the stresses to about the same accuracy for curved webs as for plane webs. The failing stresses in the stringers in curved webs were predicted conservatively in all cases.