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Prediction of buckling strengths of cylindrical shells from their natural frequencies
Author(s) -
Radhakrishnan R.
Publication year - 1973
Publication title -
earthquake engineering and structural dynamics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.218
H-Index - 127
eISSN - 1096-9845
pISSN - 0098-8847
DOI - 10.1002/eqe.4290020202
Subject(s) - buckling , structural engineering , instability , vibration , radius , elasticity (physics) , natural frequency , materials science , engineering , mechanics , physics , composite material , computer science , acoustics , computer security
The instability of thin elastic shells still remains the most challenging of all the classical problems of the theory of elasticity. It is the aim of this investigation to verify a rational experimental technique for predicting the buckling loads of cylindrical tubes under axial load as well as under external radial pressure, by measuring their natural frequencies under different loadings. Cylindrical tubes made of Hostaphan (thickness 0·254 mm and radius 100 mm) were tested under axial load and under external radial pressure in the German Air and Space Research Laboratory (Deutsche Forschungsanstalt für Luft und Raumfahrt) at Braunschweig, West Germany, and the results compared with an actual buckling test. The tests revealed that the buckling load can be predicted satisfactorily by the proposed non‐destructive vibration method of testing.