Some effects of mill practice on the stress strain behavior of ACSR

Author

Rawlins, Charles B.

Author_Institution

Alcoa Fujikura Ltd., Brentwood, TN, USA

Volume

14

Issue

2

fYear

1999

fDate

4/1/1999 12:00:00 AM

Firstpage

602

Lastpage

629

Abstract

Operating temperatures of overhead lines have risen. Tests have indicated that conventional sag tension calculations may underestimate sags that occur at the higher temperatures in ACSR (aluminum conductor steel reinforced) spans. Search for the source of the disparities has identified two effects associated with the manner in which conductors are manufactured. One effect involves residual stresses, resulting from stranding practice, in the finished conductor. The other is caused by the ability of the aluminum part of ACSR to bear axial compression. Analysis of these effects appears to explain the disparity in at least one of the test programs that revealed it

Keywords

aluminium; internal stresses; overhead line mechanical characteristics; power overhead lines; steel; stress-strain relations; ACSR spans; Hawk conductors; aluminum conductor steel reinforced; axial compression; compression modulus; conductors manufacture; mill practice effects; operating temperatures; overhead lines; residual stresses; sag tension calculations; stranding practice; stress strain behavior; Aluminum; Capacitive sensors; Conductors; Milling machines; Pressure measurement; Steel; Strain measurement; Stress; Temperature; Testing;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.754109

Filename

754109