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Bending fatigue tests on flattened strand wire rope at high working loads.

Authors
Wang-RC; Shapiro-DE
Source
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 9547, 1995 Jan; :1-19
Link
NIOSHTIC No.
20039148
Abstract
The U.S. Bureau of Mines established a wire rope research laboratory to examine the factors that affect the safety and the useful life of wire rope. In most recent work, two 32-mm 6x27H flattened strand ropes were degraded on a bending fatigue machine. The two tests were run at constant loads of 285 and 347 kN or safety factors of 2.5 and 2. Nondestructive and tensile strength tests were performed on samples of the ropes to determine the relationship between rope deterioration and rope breaking strength. Neither the area loss nor the number of broken wires measured from nondestructive tests could be used as clear indicators of the loss of strength. However, it was found from the tensile tests for both rope specimens that the strength loss was associated with the reduction of breaking strain. It suggests that measuring the strain of many short sections of a rope in the elastic region may locate the high stress sections and thus determine the condition of the rope.
Keywords
Hoists; Fatigue-tests; Mechanical-properties; Laboratories; Wire-rope; Mine-hoisting; Tensile-tests; Mining-equipment; Mining-industry
Publication Date
19950101
Document Type
Numbered Publication; Report of Investigations
Fiscal Year
1995
NTIS Accession No.
PB95-216297
NTIS Price
A03
NIOSH Division
PRC
Source Name
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 9547
State
PA
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