Elevated-temperature tests of simply-supported beams and circular plates subjected to time-varying loadings Page: 3 of 16
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aspects of elastic-plastic and creep behavior as well as information regarding
the effects of prior elastic-plastic deformation on subsequent creep behavior
and the effects of prior creep on subsequent elastic-plastic behavior. The re-
sults that are presented here were chosen to illustrate the essential behavioral
features and to provide the analyst with a selection of simple benchmark prob-
lems which embody a variety of inelastic behavioral features.
The beams used in this investigation came from 1-in. plate product form of
type 304 stainless steel neat 9T2796; the circular plates came from 3/4-in.
plate of the same heat. This material, which is being used throughout the HNL
High-Temperature Design Program, is well characterized, and the appropriate ma-
terial properties required as input for inelastic analysis are given in the Ap-
pendix of this booklet. To assure that the material test data would be appli-
cable, the finished beams and plates, as well as the material test specimens,
were subjected to identical pretest heat treatments consisting of a full anneal
at 2000 F (30 min) followed by rapid forced-air cooling to room temperature.
The remainder of this paper is divided into three major sections, which are
designed to facilitate use of the results as benchmark problems. In the First
section the problems are described. The specimen geometries and dimensions and
the precise load histograms and boundary condition are given. From this sec-
tion the analyst should be able to model and set up an analysis of each of the
problems. The second section describes the experimental approach. The test
facility, instrumentation, and test procedures are briefly described so that the
reader can more fully understand and judge the test results. The test results
are presented graphically in the third major section, and the final section con-
tains a brief discussion of the results.
PROBLEM DESCRIPTION
The beam and plate specimens are depicted in Fig. 1; the dimensions and the
method of loading and supporting the specimens are shown. The beams were each
2 in, high, 1 in. wide, and 25 in. long, and they were simply supported so that
the effective length was 24 in. The
center load was applied through 0.75-
in.-diam rollers and was down (+P) on ')"
the top surface or up (-P) on the bot-
tom surface as shown. The simple end
supports were through 0.75-in.-diam
rollers which passed through the beam ;
on its centerline.The circular plate specimens were
0.50 in. thick and had an outside di-
ameter of 20.75 in. The plates were
simply supported by a line of 0.50-in.-
diam ball bearings on a 20-in.-diam
circle. Since the center load could
be applied either down (+P) or up (-P),
ball bearing supports were required on
both the bottom and top surfaces, re-
spectively. The center load was ap-
plied through a 2-in.-diam boss and
loading bar as shown. A boss of the
same dimensions was included on the
bottom surface, and a nut and 2-in.-OD
washer were used to clamp the plate to
a 1-in.-diam threaded extension of the
loading bar which passed through a
hole in the plate. The objective of
this arrangement was to provide a con-
figuration Which could be modeled as a
2-in.-diam solid bar, top and bottom,
at the center of the plate.("l SIMPLY-SUPPORTED BEAM SPECIMEN
rr
l '
1 0 . 0 1 9 (
/ o"
(1 SIMPLY-SUPPORTED CIRCULAR PLATE SPECIMEN
Fig. 1 Dimenions of simply-
supported beam and circular plate
test specimens
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Corum, J.M. & Richardson, M. Elevated-temperature tests of simply-supported beams and circular plates subjected to time-varying loadings, article, January 1, 1975; Tennessee. (https://digital.library.unt.edu/ark:/67531/metadc877141/m1/3/: accessed April 23, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.