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
Kelvin, Lord, and Tait, P. G., Principle of Mechanics and Dynamics Dover (1962).
Timoshenko, S. P., Collected Papers, McGraw-Hill, 366–370 (1953).
Flügge, W., “Large Deflections of Thin Wings,”, Technical Report No. 3, Air Forces Contract W33-038 AC-16697, Stanford University (1949).
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