Abstract

This paper deals with the influence on the stress-strain curve of a prestressing steel of such mechanical variables as the gage length, the sample length, and the gripping conditions. An original experimental technique was developed, both to increase the gage length of the standard extensometer and to test large size wires, using different grips. The results show that, at least in a first approach, the stress-strain curve of a prestressing steel has an intrinsic character. Nevertheless, small variations in the yield strength and the flow step were noticed when the sample length changed. These differences may be attributed to the initial curvature of the wire supplied in rolls.

References

1.
Campbell
,
J. D.
, “
Dynamic Plasticity: Macroscopic and Microscopic Aspects
,”
Materials Science and Engineering
, Vol.
12
,
1973
, pp.
3
-
21
.
2.
Hill
,
R.
,
The Mathematical Theory of Plasticity
,
Clarendon Press
,
Oxford
,
1983
.
3.
Johnson
,
W.
and
Mellor
,
P. B.
,
Engineering Plasticity
,
John Wiley and Sons
,
New York
,
1983
.
4.
Ramberg
,
W.
and
Osgood
,
W. R.
, “
Description of Stress-Strain Curves by Three Parameters
,” NACA, TN 902,
1943
.
This content is only available via PDF.
You do not currently have access to this content.