Bethlehem Steel

About: Bethlehem Steel is a based out in . It is known for research contribution in the topics: Coating & Corrosion. The organization has 1529 authors who have published 1559 publications receiving 19098 citations. The organization is also known as: Bethlehem Steel Corporation.

Method for treating a flux coating

Abstract: A method for providing a smooth coating of flux material uniformly distributed on a metal surface comprising directing a flame onto the flux-coated surface. The apparatus comprises a flame distributor adapted to contact the surface of the flux coating with a high-heat flame. The impingement of the flame on the flux surface causes an initial set in the flux surface which is smooth and evenly distributed.

Earthquake Response of Systems with Bilinear Hysteresis

Abstract: A spectral study of the behavior of systems subjected to earthquakes is presented, in which single degree of freedom systems with elasto-plastic and bilinear hysteresis are considered. The system parameters that varied are natural period, damping, yield strength, and strength characteristics. The results, presented in graphical and tabular form, permit a comparison of elasto-plastic action with bilinear action. All investigations were conducted with the aid of a digital computer, using the accelerograms for the N-S component of the El Centro, Calif., earthquake of May 18, 1940, and the N69W component of the Taft, Calif., earthquake of July 21, 1962. It is concluded that bilinear hysteresis, as compared to elasto-plastic hysteresis, reduces the maximum lateral deflection and permanent set, that the energy input is affected only slightly by the presence of plasticity, and that plasticity reduces the total inelastic displacement.

Shakedown of Strain-Hardening Structures

Abstract: Elastic perfectly plastic theory predicts progressive permanent deformations of statically indeterminate structure with each cycle of variable repeated loading above the so-called shakedown load. Experimental evidence of this behavior, however, is contradictory. In an effort to explain some of the observed discrepancies, a theory of incremental deformations is developed which includes the effects of strain hardening of the material. On the basis of calculations, the importance of strain-hardening is assessed, and results of two earlier test programs are used to verify the validity of the approach. On the basis of comparison of analytical and experimental results, it is concluded that strain-hardening must be included for realistic prediction of the incremental deformations of steel structures.