Wire rope improvement program. Fiscal years 1979 to 1980. Interim report

Abstract

To address identified problems and provide information from which behavior of large-diameter wire rope could be better understood, efforts in the following areas were undertaken during FY79 and continued in FY80:• large-diameter rope testing • small-diameter rope testing • data analysis and evaluation • wear and failure analysis • load sensor development • technology transfer.Wire ropes 3/4 in., 1-1/2 in., and 3 in. in diameter were tested in bend-over-sheave fatigue. Attempts were made to correlate fatigue life of these ropes. limited field rope data were available to compare with test results. The modes of failure and wear in laboratory ropes were compared with those seen previously in field ropes.A load sensor was designed and ordered in FY79. It will be connected to the drag rope and jewelry of working draglines during the summer of FY80.Technology transfer was achieved through disseminating written materials, conducting seminars, holding a national symposium, and filming of selected field operations • iii • . .

Wire rope improvement program. Final report. [For draglines]

“…Other efforts included technology commercialization, collection of field rope samples and planning for a national wire rope symposium. Technology transfer activities prior to FY81 were documented in detail in Morgenstern et ale (1980).…”

“…To the extent necessary, this report is intended to serve as a record of the entire 6-year program. The research procedures and findings related to tasks completed prior to Fiscal Year 1981 have already been reported in detail (Beeman 1977(Beeman , 1978Morgenstern et al 1980). Nevertheless, the first main section of this report presents a brief overview of WRIP efforts from the program's inception up to FY81.…”