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Stability of rectangular plates with cambered bitrapezoidal cross sections

A theory relating moment to curvature is presented by the authors. Also, they show, theoretically and experimentally, that these plates exhibit instability for certain combinations of edge thickness and camber

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Abstract

This paper presents a theoretical moment-curvature relationship for rectangular plates having bitrapezoidal cross sections. It is shown that, for certain values of the cross-section camber and edge thickness, the plates exhibit a bending instability for some values of longitudinal curvature. Experimental results show good agreement between theory and experiment.

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Abbreviations

b :

one-half plate width

c :

plate-edge thickness

k :

dimensionless parameter defining transverse camber

M y :

moment per unit distance acting on a plane whose normal is in they-direction

N y :

membrane force per unit distance acting on a plane whose normal is in they-direction

R :

longitudinal radius of curvature as measured to the neutral surface of the plate cross section

t :

total thickness of plate

t 0 :

one-half thickness of tapered portion of plate

ω:

deflection inz-direction of midline of cross section from neutral surface

W 0 :

initial deflection of midline from neutral surface

W :

deflection inz-direction of midline of cross section from neutral surface due to applied moments

x, y, z :

rectangular coordinates

References

  1. Kelvin, Lord, and Tait, P. G., Principle of Mechanics and Dynamics Dover (1962).

  2. Timoshenko, S. P., Collected Papers, McGraw-Hill, 366–370 (1953).

  3. Flügge, W., “Large Deflections of Thin Wings,”, Technical Report No. 3, Air Forces Contract W33-038 AC-16697, Stanford University (1949).

  4. Fung, Y. C., and Wittrick, W. H., “The Anticlastic Curvature a Strip with a Lateral Thickness Variation,” Jnl. Appl. Mech.,21 (1954).

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Bellow, D.G., Semeniuk, A. Stability of rectangular plates with cambered bitrapezoidal cross sections. Experimental Mechanics 7, 309–312 (1967). https://doi.org/10.1007/BF02327137

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  • DOI: https://doi.org/10.1007/BF02327137

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