for Tensile Prestrained Tubular Struts
Publication: Journal of Structural Engineering
Volume 112, Issue 5
Abstract
Strain reversal in the inelastic range may cause a dramatic drop in the tangent modulus for mild steel struts. Other material properties also affect the tangent modulus. Consequently the influence of several of these properties is examined for an electric‐resistance welded steel tube. The variables chosen are: (1) Strain hardening caused by varying the amount of tensile prestrain; (2) strain aging; (3) and the Bauschinger effect, for a specific steel type. The results of 39 stub column tests on rimmed steel specimens show that tensile prestrain reduces the tangent modulus compared with that found for the as‐received tube, but strain aging is seen to be highly significant in reducing this loss in value. The variations obtained for the tangent modulus are illustrated for low, intermediate, and high axial tresses. The variations are given as functions of the amount of tensile prestrain and whether the steel is fully aged or non‐aged. The importance of knowledge of prior strain history of a material is highlighted.
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References
1.
Bleich, F., Buckling Strength of Metal Structures, McGraw‐Hill, New York, N.Y., 1952.
2.
McClintock, F. A., and Argon, A. S., Mechanical Behaviour of Materials, Addison‐Wesley Publishing Company Inc., Reading, Mass., 1966.
3.
Morgan, P. R., Schmidt, L. C., and Rhodes, W. A., “Material Effects on Mild Steel Strut Stability,” Third International Conference on Space Structures, Univ. of Surrey, U.K., Sept., 1984, pp. 11–14.
4.
Schmidt, L. C., and Morgan, P. R., “Influence of Tensile Prestraining on the Ultimate Load Capacity of Mild Steel Tubular Struts,” Ninth Australasian Conference on Mechanics of Structures and Materials, Univ. of Sydney, Australia, Aug., 1984, pp. 29–31.
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Copyright © 1986 ASCE.
History
Published online: May 1, 1986
Published in print: May 1986
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